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[Official] NVIDIA GTX 780 Owner's Club - Page 1820

post #18191 of 24924
Just wondered if it's normal to find A1 revision cards with the 80.80.xx.xx.xx bios?

I have a EVGA 780 SC with reference cooler.

GPU-Z says it's A1 and the stock BIOS is 80.80.21.00.80.
post #18192 of 24924
Quote:
Originally Posted by Sweetcheeba View Post

Just wondered if it's normal to find A1 revision cards with the 80.80.xx.xx.xx bios?

I have a EVGA 780 SC with reference cooler.

GPU-Z says it's A1 and the stock BIOS is 80.80.21.00.80.

With the latest version of GPU-Z?
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post #18193 of 24924
Quote:
Originally Posted by eXXon View Post

With the latest version of GPU-Z?

After a bit more searching I discovered GPU-Z had a bug so I downloaded the latest version. It's showing B1 now smile.gif For a minute I thought it was a bit strange.. and I had some kind of mutant lol

Not sure how relevant ASIC really is in terms of overclocking headroom with lower volts is but it's reading 81.0%. Looking forward to getting it under water and having a play smile.gif
post #18194 of 24924
I think asic is a measure taken at manufacture and embedded in the chip that decides the stock voltage range that card receives. It is not a measurement of anything "active", just an embedded value that can also be read by GPUZ. How much that affects overclocking, who knows? - personally I think there's more to whether a card is a good overclocker than just ASIC.
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post #18195 of 24924
Anyone know where I can get a stock galaxy 780 bios? All my games crash except for BF4. So I'm desperate to find a fix.

Bought the card with the skynet bios. Just trying to eliminate causes of the problem. Thanks.
post #18196 of 24924
Quote:
Originally Posted by Sweetcheeba View Post

After a bit more searching I discovered GPU-Z had a bug so I downloaded the latest version. It's showing B1 now smile.gif For a minute I thought it was a bit strange.. and I had some kind of mutant lol

Not sure how relevant ASIC really is in terms of overclocking headroom with lower volts is but it's reading 81.0%. Looking forward to getting it under water and having a play smile.gif

Quote:
Originally Posted by alancsalt View Post

I think asic is a measure taken at manufacture and embedded in the chip that decides the stock voltage range that card receives. It is not a measurement of anything "active", just an embedded value that can also be read by GPUZ. How much that affects overclocking, who knows? - personally I think there's more to whether a card is a good overclocker than just ASIC.

Yes, there is no correlation to OC besides the voltage leakage but from there you can extrapolate some values, not that any particular ASIC will give you a particular OC but it will tell you you're going to need more or less voltage to do it; another thing is ASIC is percentage based but we can group them, meaning some values will fall within a certain voltage!

ASIC quality < 75% - 1.1750 V
ASIC quality < 80% - 1.1125 V
ASIC quality < 85% - 1.0500 V
ASIC quality < 90% - 1.0250 V
ASIC quality = 100% - 1.0250 V

my article on ASIC:

"ASIC score is more an indication for nvidia and amd and for us only a measure of leakage in our chips (thanks to W1zzard from TechPowerup we can see the value in GPUz), its good to know the ASIC if youre going to run SLI because it want to have closely similar ASIC score on your cards because they will have similar voltages and you can clock/volt them together without having to go separate settings if you get big difference ASIC ( i.e: 60% - 80%)
@TSMC for nvidia and FAB1 for AMD, as the chips are removed from the waffer, are tested and fused with the voltage that is reflected on the leakage of every chip!

Originally Posted by Dave Baumann Product manager AMD about ASIC
"Actually, it does the opposite! We scale the voltage based on leakage, so the higher leakage parts use lower voltage and the lower leakage parts use a higher voltage - what this is does narrow the entire TDP range of the product. Everything is qualified at worst case anyway; all the TDP calcs and the fan settings are completed on the worst case for the product range"

A high leakage card operates at lower voltage to balance the otherwise higher power draw and temps. It will also overclock higher than what a low leakage card would. The problem is though, cards usually have a limit of voltage increase, i.e. say +150mV , which means AB could overvolt a 1.15V card to 1.3V, but a 1.1V card would crash above 1.25V.

A high leakage card is what you want if you do extreme OC, and you can keep the card cool (H20,LN2 etc.). Your mileage will vary of course, not all low VID cards are good OC cards, and not all high VID cards OC bad. It's a part of product binning, they try to fit in as many chips as possible to a similar ASIC spec.

From "the man" himself W1zzard - Techpowerup:

"it's from the gpu silicon, and it's used to calculate the gpu voltage.

"bad" gpus get a higher voltage so they make the default clock. "good" gpus can do it with lower voltage

as you've seen in this thread, the scale for nvidia isnt perfect yet, so i'll apply some fixes once I have more data that suggests the typical ranges of gpu leakages"



PS - Alan, how that 680 Classified thing is? Still no go?



Cheers

Ed

(Team skyn3t)

Edited by OccamRazor - 3/10/14 at 9:07am
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post #18197 of 24924
He got the courage up to ask for himself. I think he PMed Sky. thumb.gif
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post #18198 of 24924
Quote:
Originally Posted by alancsalt View Post

He got the courage up to ask for himself. I think he PMed Sky. thumb.gif


My brother didnt mentioned anything, hes too busy at work, ill ask him tonight and will keep you in the loop! thumb.gif


Take care

Ed
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post #18199 of 24924


Got one GTX 780 ti DCU II OC from Micro center last week, ordered a second one of New Egg last night.
post #18200 of 24924
Hey skyn3t & Ed,

I've just received my new card (780 Classified) and I've noticed that this card has pretty new bios version:

Could you please unlock this one if it is not 100% identical to some of already modded?


Thanks!

Classified_GTX780_v80_80_31_00_80.zip 134k .zip file
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