unlocking a 7900gs??

[idagon]

Geez, it pretty obvious by the benchmarks. these are two identical systems that ran a few points different from each other. now with no overclock one runs 300 points faster in 06 than the other.Thats a substantial gain with no overclock.

The one that runs faster shows 24/8 pipes open in rivatuner
and the one that is slower shows 20/7 pipes open in rivatuner

can you show me any 7900GS NOT OVERCLOCKED that will score 5000 in 3dmark06?

No you cant, but I can show you one.

 

[Gwargor]

Geez, it pretty obvious by the benchmarks. these are two identical systems that ran a few points different from each other. now with no overclock one runs 300 points faster in 06 than the other.Thats a substantial gain with no overclock.

The one that runs faster shows 24/8 pipes open in rivatuner
and the one that is slower shows 20/7 pipes open in rivatuner

can you show me any 7900GS NOT OVERCLOCKED that will score 5000 in 3dmark06?

No you cant, but I can show you one.

Dude.....I'm not disputing your claim, I just wanted to see it using something different than rivatuner. Is that to much to ask? If it is NP I'll get over it..Like I said All GS chip pipelines are laser cut to 20 by nvidia. If the chips say GT on them so be it.

 

[idagon]

As posted earlier, there are gt chips on some gs cards.

I would bet that mine is a gs chip, while my son-in-laws is a gt chip.

But Im not going to pull the fan and heatsink off to see.

i know of nothing else to use that opens pipelines other than rivatuner.

And simply, if rivatuner is not opening the pipelines, then what is occuring on the card to gain the additional performance?

 

[idagon]

http://www.sharkyforums.com/showthread.php?t=293587


post #11 is a picture of GT chip on someones BFG 7900GS card.

So BFG is using GS chips on some and GT chips on others.

 

[zOaib]

Rivatuner misreports this. It can't be unlocked, Nvidia laser cuts the pipelines now to prevent this. The rivatuner told my friend he could unlock 4 more pipes on his 7600GT, but it only has 12 to start with and can't be unlocked any further. Sorry to burst the bubble here, but if you do a google search it's a widely reported thing. The GT and GS are the same chip with pipelines cut on the GS. But anything is possible I guess, But you should try a different utility than Rivatuner to verify this.

ati tool tells me there are 16 pipes and 6 vertex pipes on the card , which is definately not right !

 

[MandoMan]

As i stated in my last post, both my cards happen to have GT GPUs. i under stand some companys do this for reasons. I guess the store i went to had a batch of them shipped to them.. which would increase the chances of getting the same bios locked GPU.

 

[Nele]

Thank you for the pics Mandoman.

To sum it up for all people, GS chips can't be unlocked

Some BFG's use GT chips (instead of a true GS chip), with pipes disabled within bios to simulate a GS chip. That's the only reason why they can be unlocked.

Thread complete

 

[AshenSugar]

use everest, it will show the number of pipes, i had this same argument about the x800pro vivo with a bunch of people on another forum, they INSISTED that you couldnt softmod(flash) and get true xtpe specs(16pipes) out of them, but just as with this GS/GT thing, its luck of the draw and knowing what brands to buy.
i got an Asus x800pro vivo, from what i could find out it looked like powercolor was the OEM for it, and many powercolor cards unlocked, but sapphire based cards didnt unlock for shit!!!

even with powercolor it was luck of the draw, most in my exp would unlock with a flash, if not u had to hard mod them and test.

but i was able to prove to them that i could flash back and forth, asus and pc bios where only diffrent in that the asus card had the Asus name tag in the bios, and the pc was just an x800xt pe.

 

[AshenSugar]

Like I said show it to me using a different utility than rivatuner. I've got 300 points in 3DMark using different drivers. I'm not saying that some Company didn't put GT chips on a board disable them and brand it as a GS, but I am saying that nvidia for a fact cuts the pipelines for the GS chip at the factory and they can't be enabled.

ok theres this thing called binning, its where they take a chip/card capable of higher speeds and drop it down because demand for the lower cards is higher then demand for higher ones.

best example of this i can think of is the athlon xp 1700+ tbredb i have yet to see one that wont do 2+gz yet amd marked them down to 1700+ because demand was VERY high for that chip.

same reasion fully functional x800xt pe chips/card where sold as pro vivo, the demand for provivo cards was higher(due to price), i guarntee thats why u see GT chips on GS cards that are fully functional, its a matter of sales, you sell more volume in the lower cards.

also why some people have luck unlocking x1800gto and x1900gt(rev1) cards and other dont, some of them where just bios moded to fill a sales bracket, i unlocked 3 x1900gt's from the same OEM(all made by powercolor, i checked their part numbers against the pc cards) but i had 2 PC branded cards that wouldnt mod at all.

one fun trick i found with moding cards was to find a dead one and part it out, i was able to turn a GTO that could unlock into a 256mb xt by moving parts off a dead xt also worked on an XL (missing vrgs) to get more voltege range, but its not for the faint of hart, or unskilled, you must have a VERY steady hand and the skill to use the iron properly

 

[Inteleron]

I Realy want to turn my card into a full blown 7900GT because i now know that it is completly stable at 24x8ppv. I remember the X1800GTO unlocking where this guy instead of flashing a different X1800XT bios to his card, he rather modded a few lines in the stock bios, so it was recognized as an X1800XT. Nothing else was changed, no ram timings, so it was completely stable. Id liek to do something like that with my card. Any suggestions?

 

[Gwargor]

Dude you can't unlock a 7900GS chip. But as was said here BFG Shipped some 7900GS's with GT chips and thats why they could be unlocked. If you take off your heatsink you can see what chip you have and if it's a GT then it can be unlocked.

 

[Inteleron]

Dude you can't unlock a 7900GS chip. But as was said here BFG Shipped some 7900GS's with GT chips and thats why they could be unlocked. If you take off your heatsink you can see what chip you have and if it's a GT then it can be unlocked.

I thought we already established that I own one of those BFG's that unlock? on page one i have the software proof from rivatuner, now im gonig to tell you that today when i took off my stock cooler and i installed my vf700 the core reads like this: "G71-GT-N-A2" Any suggestions on how to get this bios mod?

 

[bdguido]

Any EVGA made that way

 

[SlipSlice]

That is what I am getting too, the eVGA 7900GS..I hope I can unlock the extra pipes, its worth a try.

 

[bdguido]

It won't unlock.I think I have tried everything.It is still a great card.buy it.

 

[R_1]

I think that most of GS cards have this GPU :

This is true GT chip. Is there any special GS edition? If yes post an image please!

 

[ziddey]

image referenced from mystery's post on sharky forums:

 

[samuraiweasel]

um dudes...
i have an asus 7900gs (en7900gs) and in windows it show up as a 7900gt as well as with everest and it shows 24px 8vx in everest too
ill post some screenshots tonight and pics of the back of the card where it says the vga bios version

 

[ziddey]

If you could, could you take off the heatsink and read the core to see if it's like the picture I posted? It'd be GT if it's 24/8 and H if it's not.

It'd be good to take it off and swap the compound for as5 or the likes too

 

[samuraiweasel]

does that void the warranty???
because i bought it 4 months ago

 

[samuraiweasel]

i didnt do anything to it...
i thought it was normal but it stayed that way even after i reinstalled windows several times (due to corrupted windows files)

 

[ziddey]

sounds like you got a gt. does it say gs on the box? there were reports of asus shipping gt's at some point in time iirc. bfg has been known to ship gt's flashed with gs bios. sounds like you got gt bios already and probably gt chip, unless asus did the impossible somehow, but as far as we're all under the assumption of, the gs is laser disabled

 

[PaulieG]

I have one of these BFG 7900GS with the GT chip. It is just luck whether you get the GS or GT chip. I was able to use rivatuner to unlock the pipes. Two weeks ago, I replaced the stock cooler, and did indeed verify it was a GT chip. I believe they did a softmod to disable the pipes on the GT to keep up with demand for the GS.

 

[PaulieG]

Oh, and it was only BFG that did this, as far as I know.

 

[ginge51]

can some1 please tell me how i even try to unlock the 24 pipes on this 7900gs please using riva tuner i havent a cklue please help thx