GF6600 vmem mod

bartx · 14-07-2009, 02:30 PM

I've got old gf6600 from Galaxy. I've done vgpu mod (pencil), but I need help with vmem mod - I don't see anywhere vmem controller. Card has DDR chips, so voltage is about 2,5-2,6v I guess. My question is how to increase voltage or make memory directly powered from 3,3v rail?

High res photos below. Any help will be appreciated

Sam__ · 14-07-2009, 02:58 PM

what are the model numbers of the chips on the back? should help us find which one is the controller.

bartx · 14-07-2009, 07:39 PM

You've got everything on second photo. The problem is, that there is no standard vmem controller like in other cards. That's why I need help somebody more experienced than me

I was trying with almost all ICs on this board, but no luck.

The last thing, which I made, was soldering wire to marked spot. After decreasing resistance memory seems to be overclocking worse, but I don't have read spot so far

Maybe increasing resistance should give better results, originally it has about 430 ohms.

14-07-2009, 02:30 PM	#1
bartx Forum Member Join Date: Jan 2009 Location: Pszczyna, Poland Posts: 118	GF6600 vmem mod I've got old gf6600 from Galaxy. I've done vgpu mod (pencil), but I need help with vmem mod - I don't see anywhere vmem controller. Card has DDR chips, so voltage is about 2,5-2,6v I guess. My question is how to increase voltage or make memory directly powered from 3,3v rail? High res photos below. Any help will be appreciated

14-07-2009, 02:58 PM	#2
Sam__ Bench team-Hwbot-hardware junkie Join Date: Mar 2009 Location: Bench-shed UK, Cirencester Posts: 1,926 Blog Entries: 1	what are the model numbers of the chips on the back? should help us find which one is the controller. __________________

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14-07-2009, 07:39 PM	#3
bartx Forum Member Join Date: Jan 2009 Location: Pszczyna, Poland Posts: 118	You've got everything on second photo. The problem is, that there is no standard vmem controller like in other cards. That's why I need help somebody more experienced than me I was trying with almost all ICs on this board, but no luck. The last thing, which I made, was soldering wire to marked spot. After decreasing resistance memory seems to be overclocking worse, but I don't have read spot so far Maybe increasing resistance should give better results, originally it has about 430 ohms.

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