runmc 9800 vcore mod

[runmc]

Here is a pic of the 9800 vgpu and vddr mods.



10k v-r



http://home.comcast.net/~rbmccall2000/wsb/media/78548/site1441.jpg



http://home.comcast.net/~rbmccall2000/wsb/media/78548/site1443.jpg

20k v-r


Here is a link to macci's volt mods

http://www.maximumoc.com/img/hardware/sapphire_9800pro_setup/voltage_mods.jpg

[dttdar]

which wire is ground that connects to the 9700 on both mods, and how many ohms should each vr be set to before booting up?

[runmc]

On the v-r, I use the pin next to the screw and the pin in the middle. Snip the other pin off.

Solder a wire to each pin and then solder the other ends of the wires as I have shown.

Neither pin on the v-r is positive or negative so it doesn't matter which way you do it.

You mentioned a 9700. This is a 9800. You may have just made a type-error, but I just want to be sure you know.

Turn the screw on the v-r counterclockwise all the way out. Do it gently so you don't damage the v-r. Then just fire it up and check it with a voltmeter. Turn the v-r clockwise to increase voltage.

[dttdar]

yea, i meant 9800. I see you only used two vr's. The picture at maximumoc.com shows you need like 4 vr's. Did the maxoc pic do unnecessary mods?

[runmc]

The pics you saw were of all four v-mods

Vcore or vgpu

vddr or vmem

Those were the two I did

vref

vddq

You can do as many mods as you like. If you do the vref mod then you need to do the vddq mod. You need to keep these two voltages working together. I believe vddq is half of vref. That's how it was on the 9700 anyway.

I chose to only do two. I may do the others later, but for now I don't feel the need. :p

[dttdar]

so what results did you get over the overclocks before the vmod.

[runmc]

Originally posted by dttdar
so what results did you get over the overclocks before the vmod.
I don't do notes well and I don't recommend voltmodding, but just in case someone decides to do one, I thought the pics might help. lol ;)

[BMORIN]

Very very clean mod. I like how you mounted the trimmers on the VC itself. What did you use to do that?

[runmc]

Very very clean mod. I like how you mounted the trimmers on the VC itself. What did you use to do that?

thank you


I used a dab of silicon(atx)

I found the best way for me, is to solder the wires to the v-r, then silicon the v-r on the card and let it sit overnight. Then the next day solder the wires to the board.

That way, you can position your wires and you don't have anything to worry about.

If you solder first and then move the v-r to put silicon under it, then you move it back, well what may happen is you brake your solder joints.

Get everything positioned and secure, and then solder wires.:p

[BMORIN]

Cleanest mod I've seen. Great job. You've got your trimmers easy to access to increase/decrease.

[BMORIN]

BTW, what kind of wire r u using there?

[runmc]

I used single strand wire.

I think it was 26 gauge.. That may be wrong, but I'm pretty sure that's what it is.

Please correct me if needed.

:p

this is a 9700, it has all four mods.

http://home.attbi.com/~rbmccall2000/wsb/media/78548/site1354.jpg

:p

[BMORIN]

LOL. That is way too perfect! You've inspired me to clean mine up. Thx for all the pics BTW.

[OPTPrime]

Wow!~that is a great job done there, lots of care and precision, thumbs up my friend

[Raptor]

Nice job! :toast:

I would really like to know how much did you gain on those mems!

[zachsss626]

I noticed you left the aluminum plate off... I almost killed a 9500 non-pro trying to avoid the plate (pulled one of the solder pads for the ic off, but was able to solder a jumper in to the correct resistor.) Anyway, did leaving the plate off hurt your overclock at all? I would really like to be able to solder "over the top" of the ic's and to the actual legs, like I did on the other mods, instead of soldering to the relatively fragile solder pad. Help appreciated :)

[runmc]

I'm not totally understanding everything your saying.

I left the plate off because I had previouly shorted out a card with the plate. I didn't notice a difference without it. You could put it back on if you wanted or cut up little heatsinks and stick them on.

The card your referring to ( the one with the gold heatsinks) is a 9700.The 9700 has a heat plate on it.

The card in the first post is a 9800, it doesn't come with the plate.


What card and which mods are you talking about
??

[q149]

If I am using a 10k pot with the ground wire on the middle leg and the wire that goes to the leg on the SC1175 chip on the leg furthest from the dial, which way would i need to turn the dial all the way to make sure it is on 10k?
thanks

[zachsss626]

I'm talking about the 9700 mods that you posted. I am just trying to see if you see any differences without the plate. It's a lot easier to solder to the top of the ic leg, at least for me, and it's impossible to do that and still retain the aluminum plate.

edit- q149, it depends which legs you used (or are using) when you set up your mod. I don't know offhand which legs correspond to which direction, and some pots might be different than others... test with a multimeter and see what happens.

doh didnt read all the way... i would still test with a multimeter, but on my trimmers if i hook the wires up that way it's counterclockwise to raise resistance. This is a vishay-spectrol 15 turn trimmer.

edit again- i don't think i was clear enough on the problem the first time around, so here goes. I was trying to solder the wire low enough on the ic leg so as not to interfere with the aluminum plate. In doing that, an attempt at taking off a bad connection resulted in pulling off the solder pad, because apparently the soldering iron didnt heat the connection and melt the existing solder :rolleyes: I ended up getting a jumper soldered between that pin and the resistor that the trace led to, but it was a stroke of luck I don't want to rely on again :cool:

[q149]

I don't have a multimeter with me atm but i am using a regular 10k 15-turn pot from Radio Shack. The rig looks exactly like this (http://www.extremeoverclocking.com/articles/guides/images/radeon9700vmod_07.jpg). The pin assignment is 3 at the end with the dial and 1 at the other.

[zachsss626]

oooooops i told you what it would be for the pin next to the screw and the middle pin... for the center and end legs (on a radioshack trimmer, I have one of those too), it's clockwise to raise resistance.

[runmc]

q149,

turn the screw counterclockwise to lower volts.

you really do need a mutimeter if your going to vmod.:p

[arte]

two questions about the 9800P volt mod (vgpu and vmem)

1. Is there a very high current in the cables, do i need THICK cables or will any do?

2. When the pot is turned to 10k will i have standard voltage or higest voltage??

[vic256]

1. The current isn't that large.. It's the current in a voltage regulator that you manipulate, not to the GPU directly..

2. The highest resistance (In the multiturns/resistors recommended by macci) gives you the value closest to default voltage.

(Things you didn't ask but need to know:

3. Unless you have a small amount of knowledge about the circitry and REALLY know how to solder, I wouldn't recommend you do the vmod, and even if you do, I wouldn't recommend it anyway.

4. Remember that you are violating your warrenty so if anything goes wrong, you're left with $300+ worth of scrap. You may even ruin you mainboard/motherboard and what's in it as well.

5. I haven't been able to get more than around 10-20MHz extra out of the core with vmod than I could without, even with extra cooling, is that worth it?? Others may have had more luck with theirs, but who says you got a "good" core and mem??

6.It's only worth it if you know what you're doing, accept the risk and outcome, even if the results aren't that great AND you are an enthusiast or even fanatic.

7. Don't crank up the voltage to 1.9+V just because you can't reach the magic 500MHz. This thing gets HOT.

8. If you decide to do the vmod despite the warnings, stick with the vgpu mod, it's the easiest to solder and the less likely to go wrong.. Anyways, defenitely stay away from the vref and vddq.

9. Use common sense in whether to do this or not, not momentarely exitement of maybe getting the fastest graphx card in the block or to impress your friends, it's still a fast chip when not modded (And expensive too).

10. I wouldn't recommend it.

11. I wouldn't recommend it.

12. I wouldn't recommend it.

13. Don't do it) ;)

[texuspete00]

Dont vmod without a multimeter... Might as well play rusian roulette on your card.

[CarNabY]

I monitored now the voltages of my 9800pro before to do the mod. It is possible ? 1.76v vgpu and 3.05v for vdimm?
I used the multimeter in the points marked in the photograph of Macci....
The value vdimm would not have to be 2.9v? :confused:

[vic256]

Yeah, the vddr should be 2.9V, are your multiturn/v-r turned all the way towards max. resistance? Did you meassure your multiturn/v-r at max. resistance before doing the mod and did it have the right resistance (20 Ohm) ?

[Tom Holck]

Originally posted by CarNabY
I monitored now the voltages of my 9800pro before to do the mod. It is possible ? 1.76v vgpu and 3.05v for vdimm?
I used the multimeter in the points marked in the photograph of Macci....
The value vdimm would not have to be 2.9v? :confused:

On some cards the mem-volt is 3.05 default.

For high OC the voltmods are absolut nessesery..
But you need 2 cards!!
If the first fail!
If you can affort that, then do it.

My results:
first card: 450/370 default
Prommy cooling: 500/380
Volt mod + Prommy: 522/418

2. card: 460/360 default
Prommy + voltmod: 555/408


:D

[CarNabY]

Originally posted by vic256
Yeah, the vddr should be 2.9V, are your multiturn/v-r turned all the way towards max. resistance? Did you meassure your multiturn/v-r at max. resistance before doing the mod and did it have the right resistance (20 Ohm) ?

No vic256,I monitored the voltages without mod !!

[CarNabY]

Originally posted by Tom Holck
On some cards the mem-volt is 3.05 default.

For high OC the voltmods are absolut nessesery..
But you need 2 cards!!
If the first fail!
If you can affort that, then do it.

My results:
first card: 450/370 default
Prommy cooling: 500/380
Volt mod + Prommy: 522/418

2. card: 460/360 default
Prommy + voltmod: 555/408


:D

Thanks Tom
My 9800(Gigabyte)
475/380 default (not stable...limit)
500//380 WB and cold water(very cold water :D ) no pelti
prommy +voltmod ?????? :rolleyes: maybe......

[vic256]

Wasn't aware that at 3.05V vddr version existed.. Guess u learn as long as you live... :)

Well, it seems that heat is one of the major limiting OC factors with the 9800 Pro judging your results and my own experience...

I'm not using water cooling though ;)

Nice results...

My max OC is 479/372 with voltmod and 460/359 without... All aircooled with a Zalman heatpipe and a 80mm fan...

[Matt McFaul]

any clue on the mem mods for the 9800-256? They've change a few things. Actually doin the mod for vddr lloks like cake just cant figure out the vddq or where to mearsure either the vddq or the vddr.....the caps no longer run through the board.:slobber:

[dttdar]

i did the mem mod the way runmc has it shown, but someone told me to do it like this:

http://jason57.iwarp.com/1m2m1.gif

he told me to connect it to that highlighted ic leg instead of that solder point that runmc and maximumoc has.

So which was should it be done?
I'm asking because the highest i can go is 3.05v by turning VR.

[runmc]

I found out about the third leg myself from toofast.

I never used the third leg, but I know you can. I can turn my volts up past 3.05. I've been to 3.4v and my friend donebalp has had his up higher than 3.4v

toofast uses the third leg and a ground. he say he uses grabbers.
I couldn't get ahold of the third leg with grabbers

v-r do some strange things,

be careful with the card. I'm on my wat as we speak to pick up a new card.

I really don't know how I fried it this time. The only thing I can think of is I spun the volts up too fast. Maybe like a power surg.

[BMORIN]

Too bad about your card runmc. It is absolutely true that v-r does some strange things. I just do the vgpu and vmem.

I've noticed that TEC cooling gets me about 50MHZ on the core and the voltmod adds about another 25MHZ. Does this seem to be about the same thing that everyone else is experiencing?

[dttdar]

I think most people who have recieved great results from the mods are those using water or better cooling. on the 9800 pro, i think too much heat is generated by the ram and the core to really get a nice gain. I've had 3 9800pro's and none of them could go past 470 with vgpu at 1.8~1.9v

I had one non pro, and the ram ran really cool with some ram sinks and with the mod, i could pull a 485 on the core with vgpu at 1.9v

I've known i needed water for some time but i've been procrastinating, so hopefully if money goes alright i can get the waterchill next month.

[runmc]

Volt mods and pelts, don't do much good without at least water.

As we all know , the colder the better.:p:

[arte]

Did the vcpu and vmem, didnt give me any gain at all with stock cooling. Tried 1.9v at cpu.
Manged to push to core to 49X and mem to 380 or so, but then there where lots and lots of artifacts.
I guess a MCW50T@172W will take those artifacts away.

[Matt McFaul]

with my 9700pros 1.9v yeilded great results at first but then after a while (weeks) they began to seem power hungry and anything above 1.75 didnt yeild me any gains.
With my 9800pro I have taken a different approach...rather then going for broke and crankin the puppy I decided to ease my way up as if Im breaking in ram or something. So far so good cause Im only pushing 1.73 for 505 on the core, 1.8 for 520, and Im going to run it there for a while. At first it wouldnt go past 510 without some minor dot artifacts. After breaking it in at 1.75v and 510 for a week I notice that it will now push on a little further. I never expected that but I guess it makes sense.
Running a mcw50t stock 80 watt pelt, dedicated meanwell at 13.86 idle, swiftech duallie 120 res with 4 y.s. tech 120x35mm 122 cfm fans, mcp300 pump. I placed a temp sensor on the cold plate just before the drop for the core and am getting 50f idle and 65-72f under load.
Which brings me to this conclusion....this core must be real hot cause my nb at 228fsb2v is bringing another mcw50t up to a mere 20-30f.
Do I have a failing pelt on the gpu or is that normal???

[Amperage]

hrmm.. just started doing mods to my 9800pro.. I noticed the stock vddr was only 2.63v
I upped it to 2.85v and gained about 6mhz on bare chips.. but they are gettin pretty warm.. guess I'll have to make the ram sinks real soon.

my gpu is at 1.67v.. slightly undervolted if it's supposed to be 1.7v.

[runmc]

stock (default) volts for the 9800 are -

core(gpu) = 1.7v

ddr(mem) = 2.9v




:p:

[copyman]

Originally posted by runmc
stock (default) volts for the 9800 are -

core(gpu) = 1.7v

ddr(mem) = 2.9v




:p:

thanks a lot for gpu vmod

not bad for watercooled machine cpu and gpu

23032marks

p42.8c @ 3822mhz 9800pro [ 520 (1,9v) 385 ] F2 Extreme watercooled

http://service.futuremark.com/compare?2k1=6756109

go to vmem v mod....

[]'s

Ivo Guilhon (Copyman)

[Matt McFaul]

dont suppose any of the brilliant minds here have tinkered with the vref and vddr on the 9800pro 256 yet??? (fingers crossed):confused:

[runmc]

not I :D

[copyman]

would you have the kindness of explaining to me as the vddq and the vref they influence in the overclok?

I know that 23k already this good , but..........

Done the trimpot of the vmem vmod configure for initial value of 20koms it is safe for the first boot to do the measurement?

[copyman]

ok boys, since nobody answers
be what god wants

[copyman]

ok boys I survived
I placed the adjusted trimpot for 18.8koms in the first boot and the presented voltages were of 2,76v in the vmem, slowly I adjusted the trimpot for 2,95v, of 380mhz dirty I went to 390mhz clean, slowly again I placed 3.0v, I went to 400mhz clean, unhappily as the room temperature it increased 3c and I had to reduce the gpu for 512mhz and the cpu for 3800mhz but even so the earnings was of 250 - 300 marks in the 3dmark 2001 to 400mhz memo

23213marks

p42.8c @ 3800mhx 9800pro 514 398 F2 Extreme watercooled

http://service.futuremark.com/compare?2k1=6756810

Will it be that that memory can work with more than 3.0v in fast benchmarks?

thank you very much to all

I will continue and to be something interesting I return here

[Jowin]

whats the chances of breaking the card if you get it wrong

[Matt McFaul]

that depends how wrong you get it.....thats why I use datel displays (datel.com), if you screw up the mod then youll see it in the voltages when you boot. Then you can just reach around your machine and turn off your power supply;)

[copyman]

Originally posted by Jowin
whats the chances of breaking the card if you get it wrong

in my opinion many, you have that at least to have a minimum knowledge of electronics and it welds, now if you already have them, the chance of damaging the video board depends of as you force the voltages.

for instance, I know until the one where I can go with some margin of safety in the gpu and vmem, but I don't know as the other two mods they act in the video plate, and while nobody to explain to me or I not to get to understand for me same, although i knows you make them, I don't know you use them, and they will be left out of my videobord

in the war you get ready for the worst

me when I decided to thread strange components in a plate I got ready for the worst, lose her

[vertices]

Well this sux.

I just toasted the memory on my 9800pro. I get green lines on the screen now even at post.

I've had the Vgpu mod done for a long time and was happy with the card. I just added ramsinks and the Vddr mod and increased my Vddr to ONLY 3.1 volts.

It gave me another 15 mhz on the mem. It worked for about 15 minutes and I was running Nature 100% artifact free and all of a sudden artifacts and green lines popped out EVERYWHERE. I quickly snipped the wire for the Vddr mod and rebooted and to my horror I saw the vertical green lines at post knowing I just fragged my card.

Bottom line, be careful with the Vddr mod. My card toasted at 3.1 volts with ramsinks.:(

DAMNIT!!:mad: :mad: This sux.:(

[runmc]

Sorry to hear about your card. I know you feel horrible. :(

[muzz]

Sorry to hear that vertices,

Seems from my experience the mem is pretty sensitive ( I have a couple here toasted ).
Just got a 9800p to mod/pelt myself, I hope I dont run into that, as this bitty won't do much over 360mem artifact free stock.

[CarNabY]

Vertices,sorry for what it is happened you :mad:
The yours 9800 is still in guarantee?

It seems me weird that itself fault of the too voltage. 3.1v I is not a lot! I use the my 9800 to 3.8V!!! :eek: :eek:

[vertices]

Originally posted by CarNabY
Vertices,sorry for what it is happened you :mad:
The yours 9800 is still in guarantee?

It seems me weird that itself fault of the too voltage. 3.1v I is not a lot! I use the my 9800 to 3.8V!!! :eek: :eek:


I'm sure I have no warranty as I have epoxied ramsinks on the card. Plus the soldering. I have now way of getting a replacement short of buying a new one.:(

Maybe I will get a 5900Ultra this time just to buy something different. It sucks having to buy the same thing twice.


I also was very surprised that 3.1volts killed it. Especially when others like yourself have run up to 3.8volts. I got unlucky I guess.:(

[CATCH22ATPLAY]

Originally posted by runmc
stock (default) volts for the 9800 are -

core(gpu) = 1.7v

ddr(mem) = 2.9v
:p:
That may be true however. Data sheets indicate ddr for the R9800Pro should be VDD=2.8 and VDDQ=2.8 and Vref should be 1/2 of VDDQ. Default Vcore is kinda hard to say. I think ATI tried for 1.60 volts and if it doesn't pass Q/A then they increase it. I've had the 4 i own anywhere from 1.606 to 1.775 volts. BTW the 1.606 volt card O/Cs quite nicely even before mods.

The 256mb R9800 should be VDD=2.5, VDDQ=1.8 and Vref 1/2 of VDDQ aka 0.900 volts. Wierd thing is increasing the o/c on that ddr2 stuff doesn't increase score as much as it does on the normal ddr. Quite dissapointing actually. Since i don't see a seperate controller chip for Vref i'd bet money it's just using a resistor divider network from VDDQ to get 1/2 of VDDQ voltage. Easy enough to do and only takes 2 resistors to set Vref btw. There is no reason to look for a Vref mod because when you raise VDDQ Vref will raise accordingly because of that resistor divider network. It will track exactly too. Mobos usually use the same technique for ddr too btw. I don't believe raising voltage for VDD or VDDQ will help much. I think we need to increase current. With my somewhat expensive multimeter i can tell when power is being maxed out. I get ripple voltage. This tells me how high i can raise voltages for Vcore or VDD or VDDQ. Increasing past that ripple point is a waste of time. I've tested this on numerous cards. Why we get such different O/Cs. Worse offender so far is the DDR2 with VDD. It's possible to eliminate ripple but it's kinda hard to do unless you wanna change parts outright and actually add parts. Sometimes just swapping out an Inductor may do the trick. I was gonna build an power supply just for this. But i chickened out. I'd really hate to fry a $500.00 vid card. Especially since O/Cing the ddr2 doesn't help enough to justify the mod.

If i was an electronic engineer this sure would be easier to figure out. Frankly i'm suprised that will all the people around the world O/Cing vid cards we never really get input from an expert. I seem to do fairly good at this type of stuff. But maybe i'm just lucky cause i really don't know WTF i'm doing :confused: BUt someone just try to beat my 82f air cooling and core o/c of 530 please. Oh that same card i've ran at up to 580 with extreme cooling btw. Too bad i can't get the ddr to run above 414 :mad: Oh well it's all good and quite fun. Good luck dudes :cool:

[Matt McFaul]

it would appear at first that you are reporting your results of the 9800pro 128mb but then further down you get into the ddr2 discussion. Are you actually modding and testing a 9800pro 256ddr2 version? If so I need your input on the mods. For one my vcore doesnt seem to much matter over 1.8v and maxes out at 510mhz.....and this is with an mcw50t on a dedicated meanwell320 and h20 rig with 4- 120x35mm y.s. tech 122cfm monsters sandwhiching the raddy.
My mem without modding maxes at 405 before the onset of artifacts and I have 2 80mm sunons and 1x120mm panaflow cooling the ddr2.
I am unbelievably interested in any info you can supply me with.
thanks!

[CATCH22ATPLAY]

Yes you are quite correct. I was replying to Runmc's post of R9800 128mb vid cards voltages. Then i tried to reply to your questions about the 256mb r9800Pro2 vid card. Let me add to my previous comments, Especially to your core max limit. More than likely you hit your limit. It would require replacement of parts for you to achieve a higher o/c. Or way cooler temps. But even way cooler temps isn't gonna help all that much. Either your core doesn't like more current or volts or you can't supply enough current with the components on your vid card. There are few ways to raise current. Only problem is it isn't all that easy. Also sounds like your card is probably getting voltage ripple when you try to increase voltage above above 1.80 volts. I've owned quite a few R9700's and R9800,s and R9800 256mb models. Some get that voltage ripple at as low as 1.825 volts. I've actually done about 10 different volt mods to just 1 card trying to fix this. It helped, but not enough imo. I ended up replacing parts etc. I won't even bother trying to detail everything i did. I do every card i own just a bit different every time. My R9800Pro2 256mb card core runs at up to 2.025 volts with 82f air. Slight color coruption is all. I don't mean to suggest you try running it that high. My core stays very cool or i'd worry about it. I usually run at 1.95 with 82f air 24/7. But as far as i know i'm the only one that can do that on air. Is my custom modded PSU having that much of a difference? Hmm well for $325.00 maybe it is, i dunno. Have you checked your 5v and 12v and 3.3v on the card when it's at max o/c? I've had excellent PSU'd5v line drop to below 4.6 volts when measured at diodes on the r9800. In fact one of my 400 watt models dropped to 4.2 volts. But my modded PSU doesn't drop below 5.00 when i set it to 5.225v. I haven't done enough experimenting on my 256mb card. I'm still trying to get #1 R9800 3dmark03 score using my 128mb card. The 256mb one doesn't like to run above 550 core :( But if i ever decide to play with that card more. I believe i may have an idea to raise core a bit more. Hell i know i do. But since each card has it's own particular problems and each require a bit different mod i can't exactly tell you what will work. After having about 5 128mb models and 1 256mb model all i can say is only 1 128mb and 1 256mb card would o/c better/higher than both my R9700's. If it don't do say 450-470 core stock then don't expect to get great O/C results even if you use LN2. But having said that if and when i get #1 R9800 score i'll see what i can do about this 256mb R9800Pro2 card. I have an easy idea brewing in my head that might work er maybe :p:

[runmc]

No one knows volt modding like Catch22 :)

Nice to have your input, Catch..

I know whenever I need help with, or have questions about a v-mod, I always run to the master "Mr Catch" :D

[Matt McFaul]

thanks I look forward to hearing more when the time comes!:slobber:

I have a modded enermax and an antec true control 550 on this sytem and have attinuated all settings to what will stabilize the rest of the system. I have tried running just the enermax on gpu but that didnt make much difference...my voltaes seem really stable...unussually actually cept for the vcore but thats a different story (problem coil caused by old noisey vantec 520 i think).
Im content for the moment since funds are heck alow so take your time...hehe!

thanks again:D

[CATCH22ATPLAY]

Thanks runmc :D Matt it sounds like power may not be a problem. But I've never owned an Antec or an Enermax that i liked. Maybe i was unlucky. But mine really sucked. 5v lines dropped way too way on mine. I haven't tried that true control though. I do have another PSU that i set to 5.3 volts and when i checked volts at the diode next to SC1175 chip the voltage was 4.50 Take a reading right there. It's that big mofo right next to the SC1175 chip. 5v one side and 3.3v the other side. BTW i always solder an extra 5v wire to the 5v side of that diode to a spare molex cable. I mean spare as in make sure it's not on the same molex as you already got plugged into the card. Take it from the hdd if you have to. That usually increases voltage 0.200 alone. I've tried a second PSU to see if that would help. But it made things worse. My other PSU's just can't compare to my pcpowercooling psu. 80amps on the 5v line n/p hehe i tested it. :rolleyes:

OK now it's time to fry another mobo. Dryice time and here's for attempting P4@4.2G+ and R9800@580/414 or so. Hmm might even try 2.20 volts for gpu core again. But damn the screen looks fugly :smileysex

[bowman1964]

hey catch whats up my friend.long time no see.
i am doing a little reading and i see you post...:D

runmc glad to see this post,you did a fine job.:D

i may try out some of the mods,since i just got a r9800 and a 1700 that is suposed to do over 3.1g.so i might give them a run..:cool:

[CATCH22ATPLAY]

Hiya bowman1964 :) A 1700 that does over 3.1G? Damn i'm jealous. Very nice and i hope it does it. Was about to start my dryice bench but my computer turned off on me. Seems i left my a/c for my water cooling. I haven't insulated anything. So i just spent the last half hour + with a room heater drying up all the water/condensation. Arg i been trying to get that #1 R9800 score for almost a month now. Every time condensation kills me. Gonna attempt again after pizza. Hey good news though. I thought maybe i fried my 3.2G P4 a week ago or so. Well i just stuck it in this heated up/dried out rig and she's working again WOOHOO!!!!. I was sweating that one. Needed it for this run. Wish me luck :)

Oh hey you wanna know a secret? Don't biatch slap me for telling either people, you know who you are. Try lowering VDDQ on the 128mb R9800 to as low as 2.50 volts. Has helped a few people. Ain't done sheit for me though. Just test it and see. Use a 50k ohm variable resistor on both sides of R134. Not to ground. Basically you're just lowering the resistance of that fixed resistor. Hm i hope it's R134. I can't read it atm. It's the resistor closest to agp slot er well dimm slot actually. Also next to what looks like C140. Hope it helps someone. :rolleyes:

[runmc]

Does someone have a pic of this v-core mod, using a grabber?(micro clip):)

[Mac0r]

Originally posted by runmc
thank you
I used a dab of silicon(atx)


where could one purchase this?

[lostark374]

does any one have a pic of vcore and vmem with grabbers? id appreciate it greatly

[runmc]

Originally posted by Mac0r
where could one purchase this?


You can pick up silicon at any Auto Supply.

[krag]

Thanks runmc!! This thread inspired me to do the GPU v-mod! I did it and it works great!!!! Right now I have my 9800 Pro GPU voltage at 1.87 with a 500mhz core!!! My current card (Gigabyte) runs at 500/384. My 3DMark2003 score is 7,027!!! whhoohhoooooo!

Now I just need to do the v-mod on my mem.:banana:

BTW...I used a small patch of black velcro instead of silicone. Works killer!

[runmc]

good clocks!!!:D

velcro is a good idea, and so is double sided tape.

silicon works good, but the velcro and tape would be easier to clean up;)

[wkljohn]

you better use some alchole to clean your card

[SlimHitman]

Originally posted by lostark374
does any one have a pic of vcore and vmem with grabbers? id appreciate it greatly Here is a link (http://www.ocfaq.com/forum/showthread.php?threadid=168) to the 9800p vmods with grabbers if thats what you guys were looking for.

Does anyone know if any old 20kohm multi-turn resistor will work?
The only 20k i can find is a square Vernitron brand and i don't know how many turns or watt it is.

[(F)rossen]

Would all of these fine mods work on my Excalibur r9800 non pro, wich should arive tomorrow?


Other info

It will be cooled with a dangerden and a blackice pro radiator, so there should not be a problem transfering quite a big amount of heat, well the northbridge is also on the water pump, cpu is r404 cooled with a vapo. (But NOT hitting 3.1ghz ;) only 2715 )

[SlimHitman]

It will work on your Excalibur r9800 as long as the card follows the ATI reference design.

[(F)rossen]

The mail man was on time.

Rage3d and windows tells me that it is an 9800 pro, althoug the core speed is nonpro. why is that?

pro 380mhz
np 325mhz

The reason i bought this card, was an article, stating that it was mounted with samsung ram. NOT!!! It has infinion on it. So i guess that a hardcore memoc is out of the "?". Theres no heatsinks on the ram, but even if I put some on, would it be wize to do mods on the ram?

[SlimHitman]

Mine is a pro and Rage3d tells me it is 378/337.5.