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New Bios update for gigabyte HD7950 ! - Page 73

post #721 of 1324
rob7950voltmods.zip 305k .zip file

f43 at 1038mv

test of
fx1
fy1 at 1056 mv ./1000mv for state 2 (900 mhz i believe is stock)
Since they dont have registers for the asic quality table, i had to use what was there- which was 1056 v - i set the higher ones to asic below 52% lol.. so it picks this one only because it goes up to 90 asic.

Let me know if the fx/fy works... you can probably see by heat level under constant load??? maybe set the fan to a set number, like 45% and wait a few minute see where it stabilizes compared to stock fx fy
post #722 of 1324
And what happens when your card needs 1.09V. and gets only 1.038V.?
Edited by Belkov - 5/16/13 at 11:25am
post #723 of 1324
You can change -lower the stock mhz... in bios or ccc
So if your card can do 1030 on 1.09, you can do 940 on 1.038
post #724 of 1324
btw you know that uvd/hw accel video is 0.95v for 500 mhz stock, ,nd 2d is 0.80v for 300. so above 0.95v for 3d low is not a danger, just limits max stable speed
on my card 775 at 0.95 is ok... try it w msi ab
post #725 of 1324
my advice is to not purchase GPUs from a board manufacture that is going to hardware lock there voltage. 1.250v are you farking kidding me. My MSI twin 3 with do 1125/1500 on 1.119v and under way more stress than a game can produce. Gigalock Sucks, don't support them. They prob save money my removing the voltage regulators? just a guess.

I have 7 R7950s running 24/7 99% usage.
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post #726 of 1324
my advice is to not purchase GPUs from a board manufacture that is going to hardware lock there voltage. 1.250v are you farking kidding me. My MSI twin 3 with do 1125/1500 on 1.119v and under way more stress than a game can produce. Gigalock Sucks, don't support them. They prob save money my removing the voltage regulators? just a guess.

I have 7 R7950s running 24/7 99% usage.
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CoolingCoolingCoolingOS
XSPC Raystorm  Bitspower Dual D5 MOD Top extreme  TFC Xchanger 240 Windows 10 64bit Enterprise/ Linux Mint 
MonitorKeyboardPowerMouse
X270OC 27" 2560x1440 @ 100Hz/ ASUS VW266H Logitech G510 120-G2-1600-X1 Razer Mamba 2012 
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post #727 of 1324
Of course i have a point. smile.gif at full load on stock clocks my card needs 1.094V. If i set to work with 1.038 it will crash at full load.
Edited by Belkov - 5/17/13 at 6:54am
post #728 of 1324
So if that bios works for fx fy... but is too low v for stock clocks, let me know.

The modded f43 is 1.038, but stock clocks of 900.
post #729 of 1324
Ok, I've thoroughly tested all tree of robnitro's BIOS-es, actually 2 of them, F43 BIOS mod doesn't work on rev2 cards, it won't bootup after flashing (4 people tested it on at least 7 cards as I know of). But that doesn't matter as the other two, especially FY1 works great. FX1 works as promised but it is the FY1 that put my jaw to the floor.
Basically with FY1 mod you get unlocked voltage on rev2 boards. You can crank up voltage all the way from 1.056 to 1.25, it is all just based on your card's ASIC quality and choosen speed. GPU-z this time shows correct values and with some tweaking you can get all the sweet spots you couldn't get with F43 or FX-FY1. The trick is though to use Trixx as there was no way to force AB to even read card's voltage. One of the highlights of this mod is state 2 where you set GPU to 900MHz, memmory to whatever pleases you and check this out - voltage to 1.000 volts. I didn't want to go any lower because of high risk for the GPU itself, but even though my card has low ASIC it managed to work in that mode for more than a day before I shut it down. Temperatures with this settings oscillates between 58-61 with fans set to 33%. smile.gif
BIOSes automatic fan curve stays horrible though (F43 doeas a much better job here), but it is not that important to me anyways.
One more great feature is that HDMI finally works! smile.gif

This is one superb mod and trust me, this is quite a replacement for the f43 on rev2 boards, as with this one you have complete control over your card.

robnitro, you should send FY1 mod with complete description to Gigabyte, maybe they will hire you for doing such a fine job. thumb.gif
post #730 of 1324
Reverse engineering is my thing...like McGuyver!
Ive also unlocked things on my car ecu in the past, lol...cars "bios"

I'm glad this works for you, hopefully others have the same benefits. Is 1.056v stable for 1000? If not I can change that. Also, if I choose a lower asic state, I can make the range work lower..but I think the next step is too low (1v I remember).

I think the first voltage 1.25 is locked because the first line repeats 1.25 in hex 2 times, which may be what made it unchangeable.

Off to start swapping transmission on my VW...1st gear died!
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