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Custom bios for 6950

post #1 of 11
Thread Starter 
I have a reference 6950 with the shaders unlocked. I used afterburner to get a furmark stable 940/1400 overclock. I play bc2 more than anything and I am aware of the issues with afterburner and bc2, so I was wanting to use RBE to make a custom bios with the 940/1400 as default clocks. I edited the bios and flashed it, but i get a bluescreen right after the win7 startup screen. I dont know if I edited it wrong or what any help would be awesome.
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post #2 of 11
Quote:
Originally Posted by amxchief View Post
(...) with the 940/1400 as default clocks (...)
You cannot change the default BIOS clocks to something higher than the 6950 stock clocks, because of the CCC Overdrive limits.

You also cannot change Overdrive limits with RBE, or atleast I was never sucessful. You can read about it on RBE.

Use this tool instead.

I have an unlocked and overclocked 6950 and only play BC2. RacerX's tool works flawlessly.
Edited by nihilisti - 7/31/11 at 10:19pm
post #3 of 11
@OP

Did you bio flashed to 6970 or just unlocked shader only?
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post #4 of 11
6xxx BIOSes seem to be locked against most tampering. As has been noted, there are numerous was to apply overclocks at startup, however. I do have a stock BIOS from an OC version of a 6970 that will work fine on unlockable 6950s with default clocks of 900/1400 and CCC limits of 1000/1450, if you want it.

Also, you should double check that OC and make sure FurMark wasn't causing the card to throttle down; fire up GPU-Z and watch the sensor tab while it's running.

I've come to the conclusion that OCing the 69xx cards is almost meaningless because even a 6970 with +20% on powertune will throttle at stock speeds in more strenuous tests (OCCT 4.x for example).
Edited by Blameless - 8/1/11 at 2:54am
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post #5 of 11
Easiest way is to do what i do, open up afterburner set fan speed set OC, aply, close afterburner, and play.

Even after you close afterburner the preset clocks and fan speed will stay on, until reboot.
post #6 of 11
guys!
About the power throttle :
Set MSI afterburner oc mode to 2 !
Disables the power throttle and gives the card his full potentional !
   
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post #7 of 11
Quote:
Originally Posted by xioros View Post
guys!
About the power throttle :
Set MSI afterburner oc mode to 2 !
Disables the power throttle and gives the card his full potentional !
What about CCC power control? set it to 20%?
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post #8 of 11
The card throttles only on stress-tests. It's like a security feature. While gaming it won't throttle.
post #9 of 11
the method i use is exactly what you need for BFBC2's punkbuster bull****.

http://www.xtremesystems.org/forums/...d.php?t=265787

custom 6950 BIOS(not flash) unlocks shaders and sets voltage higher. use smart doctor to override CCC OC limit and uninstall smart doctor afterward.
post #10 of 11
the throttling your referring to.. sounds like a current limit

ie- OCP .. you should see temps and performance decrease, while at the same clock speeds..

*i have found another mod ['RT' switching frequency mod], which helps stability at high clocks and voltages... helping me break past my previous limit of 1070mhz core. By upping the slew rate of the power circuitry, I am now able to run higher speeds, without the noticeable high-pitch squeal being so prevalent.
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