G80 8800GTS 640MB and masked shaders

Oehr · Dec 27, 2008

unfortunately, iIt is not possible to enable the disabled vertex and pixel units with rivatuner.

So i thought about flashing my card with a different bios which has all units enabled(eg 8800GTX)... though if i flash a incompatible bios by accident, my card will be unusable.
so i decided to use NiBiTor instead for compatibility reasons. But i can't find the section where i can enable the vertex and pixel units...

can someone help me out here?

this is my current bios(as the one attached):
http://www.techpowerup.com/vgabios/11393/XpertVision.8800GTS.640.061026.html

P.S. i have the 96 shader units version of the card, not the 112 version

EDIT: if there are other ways to enable the shader units, please tell me

xu^ · Dec 27, 2008

at guess id say its likely impossible to turn a gts into a gtx ,otherwise ud likely see stickys on how to go about it.

and no1 would have bothered buying the gtx if it was so easy to do.

DrPepper · Dec 27, 2008

I'm afraid there is no way to enable the extra shaders because they are not physically present on the die.

Oehr · Dec 27, 2008

physically present? arent they only disabled?

Kuschelweich · Dec 27, 2008

I believe they are laser cut from the die? This trick hasn't worked since the 6 series days, or a very limited number of XFX 7900GS cards that could go GT.

Oehr · Dec 27, 2008

awh god damnit!

thanks guys!

Nelson2011 · Jan 1, 2009

only g92's have 112 shaders

erocker · Jan 1, 2009

Actually there are some 112 shader 8800GTS G80 core out there that were being sold towards the end of the GTS era. Here is a review of one http://www.tweaktown.com/news/8468/exclusive_8800gts_112_shader_review/index.html

swaaye · Jan 1, 2009

8800GTS 640 is undoubtedly the full G80 chip with parts just disabled. The reason you have a 320-bit bus instead of a 384-bit bus is that one ROP is not connected to any RAM. So I really doubt there's any way to enable more of the GPU.

You can bet that if it was possible to re-enable parts of those 8800GTS GPUs, it would've been done by now.

alexp999 · Jan 1, 2009

Also, as I've heard, Nvidia Bios' detect SP's at boot, so whether your card a 1 or 100 SP's, it will be detected at boot.
Gone are the days of MF's BIOS locking their cards, I rem when I flashed my 9550SE to a 9600 Pro! Like others have said tho, they laser disable the SP's now.

3870x2 · Jan 1, 2009

yeah, I also believe they are physically disabled, as in not physically present on the chip.
I looked at the 112SP review, and it does better than the 8800GT512! funny stuff...

alexp999 · Jan 1, 2009

My dad's currently got two 8800GTS 640Mb's in SLi, one is 96SP, the other 112SP
Anyone know how I could take them out of SLi and run benches on each one without opening up his PC?

DrPepper · Jan 2, 2009

alexp999 said:
My dad's currently got two 8800GTS 640Mb's in SLi, one is 96SP, the other 112SP
Anyone know how I could take them out of SLi and run benches on each one without opening up his PC?

Can't you disable sli on forceware ?

Processor	E6600 @ 3.0GHz
Motherboard	Gigabyte GA-P35C-DS3R
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Video Card(s)	Xpertvision G80 8800GTS 640MB
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Processor	E6600 @ 3.0GHz
Motherboard	Gigabyte GA-P35C-DS3R
Memory	2x 2GB OCZ Platinum DDR2-1066
Video Card(s)	Xpertvision G80 8800GTS 640MB
Storage	3x 1TB Western Digital WD1002FBYS RAID5
Display(s)	Samsung SyncMaster 226BW
Audio Device(s)	Onboard Realtek ALC889A
Power Supply	Corsair 520W

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G80 8800GTS 640MB and masked shaders

Oehr

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