Do these mods apply to calibre 512 7900GT also ?
Do these mods apply to calibre 512 7900GT also ?
no the calibre has the standard digital paint mod that the reference nvidia 7900GT's have.
you will notice the calibre pcb is completely different to these red 512mb cards.
Is there now a solution for a VGPU mod concerning the new Layout Palit / Xpertvision 7900GT 512 MB?
Messuring at the former VGPU Point I got 1,4V which is barely enogh for 580MHz, even with a Zalman VF900
mfg aLVaMaN
Last edited by aLVaMaN; 09-28-2006 at 04:41 AM.
welcome aLVaMaN - you got some pics of ths new layout?
I am sorry, I was not able to login the last days.Originally Posted by flytek
welcome aLVaMaN - you got some pics of ths new layout?
The picture shows a Palit / Xpertvision 7900GT 512MB with new Layout.
mfg aLVaMaN
Last edited by aLVaMaN; 09-30-2006 at 11:42 AM.
I started to messure the important points. VGPU is probably found (1,29V), as the card does only 580MHz GPU clock.
Does anybody know how to messure the small resistors? I do not get any correct values
Regards (in German mfg) aLVaMaN
Thx for measuring, aLVaMaN
Has anybody got an idea where to begin? A lot of people are waiting for a Palit Volt mod.
For comparision: 7900GS 256 from Palit:
Looking quite similar...
Could you do a close-up of the other side? Especially the area near the power connector.
Regards aLVaMaN
I was finally able to measure that small resistors;
Regards, aLVaMaN
are those measurements from the indicated points to groung?
i think you need to measure the resisters themselves by probing both sides of each one while system is off.
i think the black ones are more likely targets and that is only if the central IC there is the vgpu regulator
Hello from Germany,
here is a picture from my Palit 7900GS PCI-E 256 MB.
You can see the voltage area clearly i think.
Alle measurements ar taken from the points to ground.
I think it should be clear that the targetted IC is responsible for VGPU. Compared with the former standard 7900GT layout there is imho no other chip at all which could do that AND is not responsible for other voltages required.
persivore suggested to connect a 10k variable resistor between one of the red points measuring 626ohms and ground. So why measure the resistances of the resistors themselves as they are (imho) not important in this case?
Do you mean the black ones with three legs?
aLVaMaN
Could it be that our IC is on the back side of the card to control the voltage?
...
There are three on the back. One is for VMem, one for VDDQ and the third one is out of range...
Furthermore VGPU can be measured next to this IC on the front.
Should we do a vmem mod first?...
i think we need more time for a vgpu mod. Our gods for vgpu and vmem mods (the xtremesystems members) can't help us i think
hehe...no...i recommend whatever persivore recommends
i agree that this IC is 99% the one for vgpu but i can't be sure cause i'm a lay man in these things.
the only reason i figured to measure the value of the little black SMD's (not the 3 legged ones) is that once you know their resistence you will be able to adjust said resistence accurately with a pencil (say 2.5-5% adjustment)
once you have found the one that raise your vgpu/overclock then soldering is possible with more accurate knowledge.
but that is only what i would do because i know so little.
follow persivore's advice imo or ask him to comment on the pencil idea to help try confirm the correct point.
well done on getting this far
it seems that success is much closer now.
Ah, now I know what you´re getting at! The pencil method seems to be a nice chance of not hurting anything. I´ll give it a try after aksing persivore.hehe...no...i recommend whatever persivore recommends
i agree that this IC is 99% the one for vgpu but i can't be sure cause i'm a lay man in these things.
the only reason i figured to measure the value of the little black SMD's (not the 3 legged ones) is that once you know their resistence you will be able to adjust said resistence accurately with a pencil (say 2.5-5% adjustment)
once you have found the one that raise your vgpu/overclock then soldering is possible with more accurate knowledge.
but that is only what i would do because i know so little.
follow persivore's advice imo or ask him to comment on the pencil idea to help try confirm the correct point.
well done on getting this far
it seems that success is much closer now.
Indeed!
And Layout of the Palit GT and GS seems to be identical too.
Last edited by dracoonpit; 10-02-2006 at 12:03 PM.
Any new here?
It is getting concrete now.Any new here?
I will try it tomorrow
Regards, aLVaMaN
Mod is working
On 600 OHM's, i reached 621MHZ + 40MHZ Geo Clock...
Without any modifications you will mesure ~ 626 OHM's or a little bit more. You must reduce the Resistor until you mesure ~ 600 OHM's or something. You need only a fine and sharp pencil and 10 minutes time =)
Get my card from:
584 MHZ GPU Clock + 40 MHZ Geo Clock
to
621 MHZ GPU Clock + 40 MHZ Geo Clock
My Card is not one degree hotter than before - i think this is only ~ 0,025V more or something, can't mesure the voltage becouse my card is in my PC
Thanks to shamino from vr-zone.com and Alvaman - they gave the tip about that and i tested =D
I can confirm that this mod works on the 256mb Xpertvision 7900GS
I shaded the resistor down to 595ohms and I now get 1.42v in 3D.
That gets my clock up to 695
Am still having probs with my mem tho - can get it to 725 now. Must be something else holding that back. Anyone got any ideas?
bb
Last edited by bbjayo; 10-03-2006 at 06:10 AM.
But now ... we need a VMEM Mod, becouse the Palit Cards are using Infineon RAM with a standard voltage of 1,8V (!) not like the other cards with Hynix RAM @ 2,0V.
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