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:
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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:
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) ?
On some cards the mem-volt is 3.05 default.Quote:
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:
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
No vic256,I monitored the voltages without mod !!Quote:
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) ?
Thanks TomQuote:
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
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......
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...
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:
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.
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.
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?
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.
Volt mods and pelts, don't do much good without at least water.
As we all know , the colder the better.:p:
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.
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???
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.
stock (default) volts for the 9800 are -
core(gpu) = 1.7v
ddr(mem) = 2.9v
:p:
thanks a lot for gpu vmodQuote:
Originally posted by runmc
stock (default) volts for the 9800 are -
core(gpu) = 1.7v
ddr(mem) = 2.9v
:p:
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)
dont suppose any of the brilliant minds here have tinkered with the vref and vddr on the 9800pro 256 yet??? (fingers crossed):confused:
not I :D
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?
ok boys, since nobody answers
be what god wants
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
whats the chances of breaking the card if you get it wrong
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;)
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.Quote:
Originally posted by Jowin
whats the chances of breaking the card if you get it wrong
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