7900GS single card 720/2080

[JT from Russia]

1rk0vers Clan Evening Session
Intel Core 2 Duo@ 4.41Ghz cooled by Vapo LS
P5B- DLX Vcore modded
Forsa GeForce 7900 GS@720/2080 Vgpu-1.55, Vmem-2.27 (air IH3800 mod)
OCZ Platinum XTC 1:1 @ 4-4-4-10 2.3V
PSU OCZ 600W.....
3DMark2001SE Score 62911 3D marks
http://service.futuremark.com/compare?2k1=9156761

[skylinepower]

have you clock`d it to be 720/2080???
if so is it big clock

[serialk11r]

I was able to run 3dmark06 on dual 7900gs with stock cooling at 750mhz core...then they refused to overclock and went screwy. I did share this story before but it doesn't hurt to write it again ;)

[JT from Russia]

http://images.people.overclockers.ru/109076.jpg
:)

[v|aDy]

:LOL: Nice score, congrats. CPU clock is low for Vapo. What vCPU? What about hardmod :?

[JT from Russia]

v|aDy E6600 FSB wall 490 :(
Hardmod of what?

[v|aDy]

vGPU, because all potential of a card restrains a 1.55v.
Bad E6600.

[JT from Russia]

Vgpu 1,55V 700Mz 24/7 stable

[v|aDy]

It is great, but this clock is really low for crushin' 3DMark records or you do not wish to lose a guarantee? What about improvement of cooling? (cold water or di?)

[Achill3uS]

Vgpu 1,55V 700Mz 24/7 stable

nice card ;) dont you run 05 or 06?

here are my results @730/2000 1.5v/2.2v
3dmark06 (http://img123.imageshack.us/img123/9914/7900gs7120lb9.jpg) 3dmark05 (http://img340.imageshack.us/img340/8936/7900gs1256305ul1.jpg) :toast:

[edhunter]

JT what voltmod u have used for 1.55?
i used vids to increase it to 1.5 but mine galaxy becomes very unstable, i thing overcurrent protection is the problem
and pls can u post a photo of back side of the PCB :)

[KarwaPL]

JT would u be so kind and describe how did u manage to boost mem voltage ? I assume u have used a conductive ink ass well. Please insert some photos :) I would be very grateful dude :)
Respects

[metro.cl]

could you run 3dmark06?

i will bench a 7900GS i got here

does: 760/ 1940 1.55v/2.20v

[radcruiser]

my 7900gs does 730/978 @1.5 how do you do the 1.55 mod?
here a my lowly results. my 6600 max's at 3600mhz or so, air cooled.
http://service.futuremark.com/compare?2k1=9186574 57167
http://service.futuremark.com/compare?2k3=5312660 27973
http://service.futuremark.com/compare?3dm05=2917964 12204
http://service.futuremark.com/compare?3dm06=1697457 6897

[metro.cl]

my 7900gs does 730/978 @1.5 how do you do the 1.55 mod?
here a my lowly results. my 6600 max's at 3600mhz or so, air cooled.
http://service.futuremark.com/compare?2k1=9186574 57167
http://service.futuremark.com/compare?2k3=5312660 27973
http://service.futuremark.com/compare?3dm05=2917964 12204
http://service.futuremark.com/compare?3dm06=1697457 6897

Same way as 7900GT 1.55v


http://img194.imageshack.us/img194/2450/diagram28mycopy1fs.jpg

[KarwaPL]

Ok metro.cl :)
According to the photo u ve pasted:
- blue connection gives 0,1V boost of gpu voltage
- red one gives 0,2V
- blue and red together (yellow) it's 0,3V boost of gpu voltage and
- purple one gives another 0,05V
Am i right ??
What about mem voltage ? How can I raise it ?
Respects

[metro.cl]

Ok metro.cl :)
According to the photo u ve pasted:
- blue connection gives 0,1V boost of gpu voltage
- red one gives 0,2V
- blue and red together (yellow) it's 0,3V boost of gpu voltage and
- purple one gives another 0,05V
Am i right ??
What about mem voltage ? How can I raise it ?
Respects

you are right about vGPU mods.

About vRAM you can use pencil mod its really easy

[Daveb2012]

Very nice OC, congrats.

[KarwaPL]

Last question :)
Which resistor should I pencil to raise mem voltage and where can I measure cpu and mem voltages ?
Thx

[metro.cl]

Last question :)
Which resistor should I pencil to raise mem voltage and where can I measure cpu and mem voltages ?
Thx

http://sg.vr-zone.com/?i=3330&s=2

[KarwaPL]

Ok thx :)

[Supertim0r]

benched AM3 ?

I had 181k with 650/850, 6700 4.6ghz before cpu/mobo die

[KarwaPL]

Unluckily my Forsa 7900 has different pcb than yours lol It's ver. B and it has much more capasitors - precisely 15 condensers and 3x1ROM on the upper side :)
Any ideas how to do a vmod on it ??
And a photo
http://www.fotosik.pl/pokaz_obrazek/pelny/0d4f90737ecf51f2.html
Cheers

[KarwaPL]

Does anyone know which leg is responsible for output voltage here ?
Capasitor RT9602
http://www.cheertech.com.tw/RichTek%20CD/Data%20sheet/DS9602-03.pdf (http://www.cheertech.com.tw/RichTek%20CD/Data%20sheet/DS9602-03.pdf)
Thx