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5900/5950 (NOT xt) volt mod instructions

R

ryuji

2[H]4U
Joined
Jun 11, 2004
Messages
3,115
i need instructions on how to do this... my card is nvidia reference design and i want to do the volt mod before i install the zm80d-hp
 
5900vmodguide.jpg



Enjoy :)
 
i have a question.. the top variable resistor is for core voltage right?
 
one more question.. reading my voltages its 1.56 for core and 2.75v for memory (flashed it with 5950 bios)
how high can i go before its gonna die fast... i want it to last 2 years or so
 
ryuji said:
one more question.. reading my voltages its 1.56 for core and 2.75v for memory (flashed it with 5950 bios)
how high can i go before its gonna die fast... i want it to last 2 years or so
Click to expand...

ask killa bee I think it is...he burned out like 2 5900's LOL
since I didnt do the mod I cant say bro.
 
BFG GeforceFX 5900 128mb 615/1020, 1.593v core, 2.79v DDR is what i finally setteled in on with my card...

Memory:
I know when i was Maxing out the card (fried on like this) i put the memory up to 2.9v with sinks and air flow. If you want the card to last i would stay 2.75v DDR, 2.8v if you got some sinks (not the stock HS, but seprat sinks for each chip) I highly recoument 2.75v top on memory.....

GPU/CORE:
1.52v max on good air cooling...1.6v water cooling. But if you plan on keeping the card for 2 years...really play it safe stay. >=1.55v even on water....When i had my water chiller hooked up (5-15c water, with anti freeze) i ran 1.72v almost broke 700Mhz before the secound one fried... :)

Also, only adjust the card in 2dmode on the windows desktop. just incress it what you want to incress from stock 3d votlage

Stock:
1.1v=safe mode or bios
1.2v=2d
1.4v=3d

So go to the desktop, test with multimeter first to verifiy its running 1.2v (2dmode) ther set it up a bit say 1.25v this will give you 1.45v in 3dmode.... get it? yes you do it wile the system is on..... be carefull...... andmore questions?

memory on its way up......
5900nu%20012.jpg


I did the memory volt mod first....the GPU is not installed on this PIC
5900nu%20014.jpg


Kinda hard to see but both voltmods are installed here...
5900nu%20555.jpg


pic from her final days.....
KillaBee-P1010079.JPG
 
my card is ~50C full load tops on air cooling.. the highest voltage for both memory and core are exactly what my current voltage is :(
if i can change the voltage at all.. you still have a diagram of where to solder the stuff... i lost it
 
54YW4T said:
Is this what you are looking for:
http://www.cluboverclocker.com/guides/5900_Flash_Mod/
Click to expand...
i have already gone and tried out about 50 bios's this one does the most voltage for memory(if memory changes at all) and core

my question is my cards currently running at 1.56 for core and 2.75v for memory killabee said that was the max i would want to do even with physical modding... is there any more it can go and still last about 2 years at most? im trying to squeeze every last bit of preformance out of it
 
ryuji said:
i have already gone and tried out about 50 bios's this one does the most voltage for memory(if memory changes at all) and core

my question is my cards currently running at 1.56 for core and 2.75v for memory killabee said that was the max i would want to do even with physical modding... is there any more it can go and still last about 2 years at most? im trying to squeeze every last bit of preformance out of it
Click to expand...

well its a gambel...but i would not recoment it... and really, once you get to 1.55-1.57v the gains in MHz are minimal.....you get the most Clock gain form the first few .1 volts added...

its not to you benifit...for more preformence start playing with drivers....also try upping you AGP clock speed...helps me a bit, most top out at 80Mhz..
 
I(illa Bee said:
well its a gambel...but i would not recoment it... and really, once you get to 1.55-1.57v the gains in MHz are minimal.....you get the most Clock gain form the first few .1 volts added...

its not to you benifit...for more preformence start playing with drivers....also try upping you AGP clock speed...helps me a bit, most top out at 80Mhz..
Click to expand...

Why would overclocking the AGP bus bring any benefit? Isn't that kind-of redundant considering AGP bandwidth never becomes saturated? I'm confused :confused:
 
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