There is high res. picture on techpowerup pages,front or back,you can choose :D
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There is high res. picture on techpowerup pages,front or back,you can choose :D
erm, ill eat my words. They are in a review available HERE.
edited because the pics were huge. You can find them in the post below me.
Yeah, :(Quote:
Originally Posted by quake6
^^
Not yet... As jimmyz said, this is not even done with testing yet...Quote:
Originally Posted by JamesBong420
You'll hear directly from him and W1zzard when it's complete (read: safe).
We're still poking around at this point. ;)
OMHG This thread is crazy! I love xtremesystems!
ummmmmm the chip to do the vmod is on the front.. i wish i could just read the chip. or at least have a card.. might have to grab one as well and slang the 4850 after i finish making a PWM circuit for her...... :up::p:Quote:
Originally Posted by Theta
How were you planning on doing the pwm mod? Just attatching another PWM ic with the current one?Quote:
Originally Posted by JamesBong420
yea basically make a separate circuit on some waffer board, some mosfets..... direct attach to the feed for gpu..
stealing "Rol-Co's" method..
http://www.xtremesystems.org/forums/...&postcount=329
Quote:
Originally Posted by Specialfighter
Hi there
What POTs may be used for VCORE and VMEM ? i have one of 1kohm, one of 10kohms, 2 of 20kohms and one of 50kohms
Regards
You use a 100k pot for both the vmem and vcore. Happy modding.Quote:
Originally Posted by weirkved
cant be dif from 100 :s?Quote:
Originally Posted by wesleyclark
It could be higher, but i think anything lower will result in a stock voltage that is to high. But i am not sure, you might want to wait for someone else's response.Quote:
Originally Posted by weirkved
@weirkved
please read this. it will help.. and to anyone who is new to vmods. :up:
http://www.aoaforums.com/forum/hardw...mod-guide.html
I tried the 20K vr recommendation by VR Zone for both Vgpu & gddr on 4850.
Works fine using 20K vr.
Vgpu measure
http://img111.imageshack.us/img111/9...ebyshamxs8.jpg
http://img111.imageshack.us/img111/9...23f80bd208.jpg
Vgpu mod using 20K VR
http://img162.imageshack.us/img162/4323/vgpuxh6.jpg
Vgddr mod using 20K also
http://img104.imageshack.us/img104/5539/mg2257ke7.jpg
4870 uses same Vreg as 9800GX2 and GTX 280, I am looking for VT1165MF data sheet, hope no NDA on it.
Could you post a link to that guide? as i am a little confused about the pictures.Quote:
Originally Posted by intel101
why thanks. looks like the one in the first post of this thread, just using lower trimpots, and one less solder point to the PWM.
why change voltage destroing warranty, when you can do it via bios edition with RBE_111?
Changing the bios values will result in a maximum of 1.21volts, which isn't as big a gain as some would like.Quote:
Originally Posted by weirkved
... you posted the same question in 2 threads...
why do i hear an echo? lol
I don't think some of the people posting are reading the whole thread.
Alright, I've tested my HD4870's VGPU measure points and just holding on for the VGPU mod. . .
Got it all under water at the moment and BIOS moding doesn't seem to do alot since I don't know what the maximum VGPU values are for BIOS mods.
I just wish it was as easy to mod the voltage as it was on my 2900Pro, where the BIOS allower for some pretty hefty voltage increases.
4870 vgpu bios mod? default 1.263v
Currently got the card running at 840 on the core with 1.276v which i believe is the max attainable in the bios.
Reading the actual voltage on the VGPU points gives me 1.19v at 1.276v bios, and 1.18v at 1.263v bios.
OK, so i will be picking up the 4870 in a few days hopefully, and would be willing to be a "Guinea pig" to find a volt mod.
Just one question, do we need to install the hotfix over the catalyst 8.6 or install the hotfix as a standalone?
Question about soft-modding my 4850 (I know, I know... this is all about the hard-mods :)). The Voltage through BIOS is both for the Core and Memory correct? My Visiontek has a stock voltage of 1.046 idle and 1.084 (not actual) at load and my max OC (CCC) is 700/1050. Bumping the memory to 1075 artifacts after a few minutes in ATITool (max load temp was 66c at 65% fan speed).
So bumping the voltage to 1.15/1.2 should give me a nice amount of headroom on the memory correct?
The Hotfix is a standalone ;)Quote:
Originally Posted by wesleyclark
where are the vgpu read point on 4870?
The reason that the method in testing has not been posted publicly is precisely that - to keep people from becoming guinea pigs.Quote:
Originally Posted by wesleyclark
Once you get your 4870, PM jimmyz if you want to test with us.
And lastly, the mods in question currently all occupy the back of the card, not the front (to address earlier speculation).
I posted it two pages back... ;)Quote:
Originally Posted by u22
or its right here. I spent the time to find it, so i might as well post it yeah?
Quote:
Originally Posted by W1zzard
What i meant was, i wanted to help you guys test it out. Sorry for the confusion. I will pm jimmyz once i get it.Quote:
Originally Posted by Theta
I was simply pointing out that I had posted it TWO PAGES back... No use in littering the thread with large posts that are very CLOSE to one another in the same thread... :confused:Quote:
Originally Posted by wesleyclark
Still, it's not a huge deal. ;)
Sounds good to me, I'm still trying to figure out if I've even hit the nail on the head... Voltage is going up, but not in the way it should be...Quote:
Originally Posted by wesleyclark
Hey guys, question, what sort of read outs from the VGPU measure points do you get on your 4870s ? ( The ones with DMMs ).
need 4870 gpu measure point? :shrug:
It's about 3 posts above you.
Still clocking this 4850 up. Currently i have it up to 900/1120 @ 1.44v vgpu
Will submit to hwbot when i find the max :)
http://img359.imageshack.us/img359/8105/18517ae3.png
sorry guys,
Can you post a photo for 4870 vgpu mod?
wich trimmer can I use?
under watercooling, Which is the max safety vgpu for benchmark and wich for daily use?
thanks
There is no confirmed 4870 volt mod. Some are working very hard on finding it, and confirming it. Be patient, and it will be here soon.Quote:
Originally Posted by diablos
As for the trimmer, you'll have to wait until they find the volt mod first.
thanks;)Quote:
Originally Posted by wesleyclark
Wow guys screw the 4870. The 4850+mods is by far the best bang for your buck out thier period. Heading up to bestbuy to grab a 4850. I will be armed with a Zalman VF-900, volt meter and my trusty Number 2 pencil!!:D
But a 4870 vmoded would be a better performer...still within a reasonable price.Quote:
Originally Posted by vengance_01
Which is what i am going for.
Hate to burst your bubble, but here's the fact about what you're saying:Quote:
Originally Posted by vengance_01
Best Buy 4850 = $199 + Tax (Maybe 10% off, Saving Tax)
VF-900 = $30-$35
So we're at about $240 for the retail 4850 w/ VF900. Now, the 4870 is $299, and can clock without mods to at least 790 on the core...
After modding 3 4850s, the best core @ 1.4v on an Accelero S1 was only 820 for me... All of my Visionteks were duds, I guess... I also hate to tell you that your VF900 will be overwhelmed after 1.35v on the VGPU, netting you an average of 810 on the core.
I posted my results of the vmodded 4850s vs the 4870s, and there was still over 10% of a difference in favor of the 4870...
Also, the volt mod will be available soon for the 4870, and the stock cooler may actually be able to handle a bit more voltage. I'm loading up at 48C on 1.3v, stock coolers, in CFx.
So really, it's up to you, but it's not a HUGE price difference, and the 4870 is still on top no matter how you slice it.
Thank you theta, that's exactly the kind of support i needed. I also plan on getting the soon to be released thermalright cooler, and sticking it on top of a pelt, so that should do some pretty good cooling for me.Quote:
Originally Posted by Theta
Well, all that being said before, the guys with water cooling have it made with the 4850, as they're able to just dump voltage into it. 1.5v+ only nets 40-45C load
Since we don't know how the 4870 scales at the top end yet, the 4850 may be a better choice for top end benching and testing with high end water, phase, and LN2/DI.
Air is a different story though, and CF is a consideration for me, and many others... Can't go to crazy with air cooling in two PCI slots. ;)
hum... Well I already have the Zalman VF-900. If Bestbuy has the 4870 I might get that, but there are currently 0 volt mods for the 4870's. Also what were your temps at 1.4 volts? These cards seem to take the heat well. Also the 4850@800 core and maybe 1200 memory is still a fast card. Also I am not looking for top performance, but bang for my buck and thats where I see the 4850. I guess lastly it will be more fun to bench the 4850 then the 4870. Not in terms of score, but fun in general. =)Quote:
Originally Posted by Theta
Completely agree with you there! The 4850 is a ton of fun pushing it to the wall, and it's fairly cheap by itself. Hell, they ran a $150 deal a few weeks ago on it... Talk about a steal.Quote:
Originally Posted by vengance_01
My temps were in the high 60Cs, low 70Cs at 1.4v. Topped out at 1125 memory on all cards @ 2.2v, didn't want to push it further.
Had to stop playing with them to focus on the 4870 volt mod tests. :)
nice clocks Booj !
ok thats what I wanted to hear.I wish I could have gotten the card when it was 150$. Also O/Ced 4850 can come close to a 4870 which is great. I mean when have we seen this kind of performance from a single slot card at this price. :up:Quote:
Originally Posted by Theta
I know how you feel. I got mine for $140 brand new. For that price, it's just too hard to beat (and turn down)!Quote:
Originally Posted by Theta
Too bad I'm afraid to hardmod my card (and never done it either) so I will be sticking to BIOS modding :shakes::)
preliminary 4870 mods. still need resistor values. both solder spots are on the back of the card
http://img.techpowerup.org/080704/Capture420.jpg
http://img.techpowerup.org/080704/Capture419.jpg
BEAUTIFUL. But what is the difference between mvddc, and mvddq? I know vddc is for the GPU core.Quote:
Originally Posted by W1zzard
after 3 seconds of google: MVDDQ is the VDDQ or I/O voltage for the memory chips
Why don't you know about resistance values? What are the enterring resistance in the regulation chips?
Glorious just what I wanted to hear I just gotta figure out why all this flickering in 2d mode when I edit the bios.
I was out, I Have PMed the values to him but he was not responding.Quote:
Originally Posted by Clemmaster
VDDC 50 ohm
the mem mods should be 5k each.
Hey there, just wanted to say the pictures are great, I'm not sure who does your photoshop work but say thanks to them too because it makes things very clear and easy to understand for hard-mod nOObs like me! :up:Quote:
Originally Posted by W1zzard
Guys I am trying to do the pencil mod. I have my volt meter and I am getting 1.06 on idle and 1.10 on load. I have a VisionTek version. Temps are fine at under 60C and I look semi stable at 700/1100 at these volts. I am using the right points before. I used this same DVM when I had my GTS 8800. Do I need to flash my bios to unlock the extra voltage? Because outside of windows I measure at 1.14
I think.
Edit I was able to flash my bios. with 1.19 volts on load, 740/1100 looks to be stable. Temps are around 65-66C when running Mass Effect. I think I will keep it here. Temps are pretty high and I am almost close to 4870 performance.
I had my Powercolor 4850 at 750 and 1150 with bios flash with bios vgpu set 1.4 if that stuff works or not. And 3dmark06 15180 in vista with q6600 @ 3.6
I have a TT Duorb installed on my card. Auto tune went to 690 and 1153 completely stable.
Would a volt mod make the 750 stable then?
It should, mine and most others can scale to over 900 with the mod and proper cooling.Quote:
Originally Posted by piebaker
Hello .
I have done the pencil with my HD4850 and have now 1.37 volt for the GPU under water ( swiftech waterblock ) .
I flashed the card at 850 Mhz for the GPU but when i use 3dmark2006 , i have got some artefact on the last scene with snow but no freeze .
At 820 mhz GPU , no more artefact .
So , do you think the card need more voltage or is it normal to have some artefact at 850 mhz GPU ?
Did someone notice the same thing ?
4870 Pencil mod? GPU or Mem :rolleyes:Quote:
Originally Posted by W1zzard
It isn't normal since it went away after dropping speed. You may need a touch more voltage for 850, just keep an eye on the temps.Quote:
Originally Posted by jeanjean15
When the volt mods are confirmed properly and working then we can worry about pencil mods. Though I won't be searching for any others will. I feel a pencil mod is never the answer. hard mod only in my house. I like to be sure It is working right.Quote:
Originally Posted by 865pe
Ok , thanks .:)Quote:
Originally Posted by jimmyz
The température is ok , only 50° C max . So , effectively i should increase the voltage to solve the problem .
Or just find a speed/ voltage setting you feel good about. that is what it is all about anyway, not everybody will keep their cards at max clocks all the time. also try a tough bench like crysis etc to test 3DMark is not long enough to test for gaming speed. I like to play for an hour or more.Quote:
Originally Posted by jeanjean15
Thank you for the advice but before deciding which speed will be the best compromise for my use , i like to find the maximum speed with 3dmark2006 and 3dmark2003 because these are very good benchs to do this.Quote:
Originally Posted by jimmyz
Just got my water block.
900/1110 clocks for 24/7. LOVE this card:p:. Have yet to try higher...
What is the voltage ppl. are putting though the memory, 'cause at this point, that is what is bottlenecking me. What do you think the max I should put is? I've got heatsinks on it, btw.
nice clocks. My memory will not go above 1100. I even upped the voltage from 2.0 to 2.2 and it did not help. Oh well my 725/1100 clocks are find for air cooling during the hot summer weather out here in CA.
what voltage are you running with 900? 4850s seem to be hitting that around the 1.4-1.49v ballpark. Try pushing the highest you can go while being artifact free, I am curious to know how much of a difference the power circuitry and additional 6pin Power connector makes in ocing the RV770 to its limits on air/water
Furmark seems to be a great stability tester
Right now I'm pushing 1.40v core and 1.09v mem. that was just the first voltage I tried and it worked, so I'm thinking I could push the core a bit more without having to raise the voltage. My temps are amazing: 29C idle and 34C load WITH the vmodd and nearly 50% overclock :eek:. haha. I'll keep pushing it more later tonite or tomorrow morning.
Edit:
3dmark06 15942marks (16k to be broken VERY soon, obviously. my cpu wasn't oc'd to benching speed)
Vantage 9057 Marks (to be raised, my cpu wasn't oc'd to benching speed) hehe
Again, this is 24/7 ROCK stable, artifact free, etc, etc. I love this card...
sweet, go for 1GHz! Run Furmark for stability, seems to stress the cards very high compared to 3DMark and ATITool
http://www.ozone3d.net/benchmarks/fur/
1.4v @ 900 is definitely on the low side compared to 4850 overclocks, so maybe the cores are binned after all :)
Hi there. I had this same problem and I can help you there. The flickering that happens between 2d and 3d mode is due to changing memory clocks. You'll notice that the 4870 by default has the same 2d and 3d mem clocks. You'll need to modify your bios to have the same 2d mem clocks as 3d mem clocks to fix this issue (worked for me). Just up your 2d mem clocks to your overclocked 3d mem clocks.Quote:
Originally Posted by keninishna
for the vgpu mod on the 4870 can i use any ground eg heatsink screws or does it have to be the one pictured?
Any ground, I use the ones where the PCI-E power plug hook to the board.Quote:
Originally Posted by dean0
ok thanks ive soldered the vgpu point just need to ground then ill post some pics and results
i dont think this vgpu mod works for the 4870. Ive done everything correct as in pic execpt i used a heatsink screw for the earth. When im turning the 50k vr there is no change from 1274v, which i had set in bios, any ideas?
Sorry it does work vgpu at 1.3v, i hadnt turn the vr enough :rofl:how how can i push on stock cooler?
where did i say 50k? it is a 50 ohm VR. no wonder you had to crank it way in.Quote:
Originally Posted by dean0
it wont damage card unless i give it too many volts just gota be carful right?
exactly, keep an eye on the volts. a 50 ohm will give much better voltage control, more linear. also there should be some sort of ovp if you make a mistake, but I wouldn't count on it.Quote:
Originally Posted by dean0
kk thanks . Would a 5k be better than 50k? i cant seem to find 50ohm vr in my local shop they only have 5k 10k 50k...........
Iam at 1.33v and if i go slightly higher screen goes blank and i have to restart? any ideas :p:
get a 5k and try it. the 50k has no real scaling a tiny move will probably put you past the OVP limit.Quote:
Originally Posted by dean0
Just found out my local shop sells 1k and 500r. which one is best?
lower the better. the 50 ohm was what the other tester (Theta) used.
Hey Dean, I can't find a 50 at my local store either. Let me know how the 500 works out for you.
Sorry for the delay - was away for the holiday...
You guys will need to order a 50 ohm, they're never in stores...
That being said, you CAN buy a 1k ohm off the shelf at almost any store (including radioshack)... BUT, be very careful, as the 50 ohms you need will me the last 3/4 turn of the 15-turn pot.
Lastly, you can use fixed resistors to get the desired voltage as follows:
10 ohm fixed ~ 1.566v
15 ohm fixed ~ 1.465v
22 ohm fixed ~ 1.400v
27 ohm fixed ~ 1.375v
33 ohm fixed ~ 1.355v
CAUTION - I have not tried anything past 22 ohms (1.4v) on the card. So far, it has lived through all of the other voltages. The mod is successful, but I still need some help with BIOS modding to get some good clock numbers past 790.
try this to pass 790 ;)Quote:
Originally Posted by Theta
http://www.overclex.net/data/images/...cktool-9.8.rar
Just to give everyone a heads up. Do not use the Zalman VF-900 with a volt modded 4850. Even at 1.21 load it gets very hot to touch. Granted I do have 85F room temp. But The AC S1 passive with good case airflow is beating the Zalman. under 60C full load. I don't have room for fans, but I will try to add them.
Now I did warn you! :DQuote:
Originally Posted by vengance_01
Just had to say it. :p:
Why zalman vf-900 is so bad for modded 4850?I don't understand that..
Not beefy enough to dump the heat effectively.Quote:
Originally Posted by 0maro
After 1.25v went into free climb 90+C in our tests.
I know you did, but I just had to find out. I just can't believe how well the S1 handles this card passive with great airflow in my case. I have room for 2 80mm fans even with a small wireless card in my way. Gonna rig those up as well. But man I love this card. Playing Crysis at 1680x1050 and a popular custom config. Everything looks so good and now very playable. Should get a nice boost once I go for 750 again. I am glad I got the 4850. But what I don't understand is how ATI could ship the 4850 with the bios it had and how hot it was running. I remember how much heat the card at stock was dumping into my case. It was terrible.Quote:
Originally Posted by Theta
You will be seeing my old 8800GT and G92 GTS in the FS section soon. =)
My god, this card requires MASSIVE cooling for the voltage regulators. I had previously cut the original heatsink and used that, but over 1.4v it just gets into the 80c and over range. I just modded a cpu heatsynk to fit the voltage regulators and it seems cool, even in 3dmark06. Working on a beefy ramsink right now. Time to push to 1000mhz:D.
Big probelm! I done the vgpu mod succesfully and after testing stability in atitools artifact scanner it looked good but know when i run 3dmark06 my frames have dropped and i have loads of artifacts, its the same in crysis.
I did at one point boot with the volts at 1.7v could this have buggered the card? ow well back to the shop for a new one :shakes:
try driver re-install too.Quote:
Originally Posted by dean0
just tried driver intall, still lots of artifacts on games and 3dmark, you think to many vol;ts?
on the 4870 or 4850?Quote:
Originally Posted by adpr_02
did you have time to measure how much current flows across your resistor? with only 50 ohms i could imagine it getting quite bigQuote:
Originally Posted by dean0
He used a 50K VR for his mod at first had to screw it all the way in to make voltage climb.Quote:
Originally Posted by W1zzard