• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

Overclocking your HD6950

eViL_M@LuM said:
Use the latest version of afterburner beta. I'm using 2.1.0 beta 7, go into settings and enable voltage control, set your voltage to 1300mv. then open up CCC and under performance, AMD Overdrive, Power Control Setting - set to +20%.

Apply all settings.

Now reopen Afterburner and start tweaking your core and ram. On my XFX I was able to max my cards in crossfire to 938mhz core 1430mem on both cards @ 55% fan speed cards hit 62c under furmark multi gpu load.

I'm more limited by my 700w psu than my cards I believe. Once I get a newer psu I believe these guys will hit 1000/1450 much like my 6850's last week.

send me a pm if you need anything specific.

And yes smartdoctor requires an ASUS bios on your card. Brand of the card doesnt matter, my gigabyte 6850's were flashed as asus's for the increased core and mem speeds.
Click to expand...

You should not need 1.3 for 938core. It should do 938 core on stock volts, or at least 1.175. 1.3 volts should get you over 1000 core.
 
Not in crossfire it needs every bit of 1.3v for both cards to hit it. Anything over 900 on stock volts is instant lockup.
 
eViL_M@LuM said:
Not in crossfire it needs every bit of 1.3v for both cards to hit it. Anything over 900 on stock volts is instant lockup.
Click to expand...

Weird. Personally, I'd not be running 1.3v into those cards just for 938 core. Just me, though.
 
From what I've read 1.3 is completely safe for daily use, it's the hardmod that allows you to go above that is where I'm hearing of people toasting their toys. What are you using that even allowed you above 950? I'm assuming a nodded bios?
 
eViL_M@LuM said:
From what I've read 1.3 is completely safe for daily use, it's the hardmod that allows you to go above that is where I'm hearing of people toasting their toys. What are you using that even allowed you above 950? I'm assuming a nodded bios?
Click to expand...

Modded bios that unlocks shaders and sets base voltage to 1.175. I think MSI Afterburner, the newest one, allows any card to clock up to 1000 or above if it can make it on 1.3v or lower.
 
Using a the same modded bios (6950 asus bios, 1.100. +.075v, shader unlock) I am running my HIS 6950 at 900/1375 stable. But i actually lowered the voltage to 1.125 and set power control to +10%. Before the bios switch I would get lockups at anything above 870 core and 1350 mem, All it needed was the tiniest of voltage bumps. I haven' even pushed it really, i think i found a fairly good balance at the moment.
 
Guess I should mention I'm running +20% power control on both card as well could be the reason for the voltages?
 
eViL_M@LuM said:
Guess I should mention I'm running +20% power control on both card as well could be the reason for the voltages?
Click to expand...

Dunno. I don't mess with CCC or change any power control numbers. Left it locked. Just using Afterburner.
 
After bumping my pc to +20 on both my cards completely changed, they're a lot faster than my same oc with pc untouched nearly 4k gpu in vantage kind of difference. Bc2 in 5760x1080 went from 47ish avg to 75ish avg
 
SilverSliver said:
Dunno. I don't mess with CCC or change any power control numbers. Left it locked. Just using Afterburner.
Click to expand...

after messing with the new Afterburner and enabling unofficial Ocing I was able to get +20%pc on both cards and 1005/1438 stable in furmark @ the same 1.3v. Curious if the beta version of afterburner was just saying I was actually increasing voltage, but actually did nothing.
 
Scratch that, I got some minor artifacting finally with my mem at 1375, lowered it too 1350, tested with furmark and a couple of hours of gameplay. I did raise the core to 915, no problems so far, hits 78c under load with 50% fan profile ( set to ramp up to 70% if the card rises above 85c). Really digging this card. Evil, i am envious of the numbers you are getting
 
eViL_M@LuM said:
after messing with the new Afterburner and enabling unofficial Ocing I was able to get +20%pc on both cards and 1005/1438 stable in furmark @ the same 1.3v. Curious if the beta version of afterburner was just saying I was actually increasing voltage, but actually did nothing.
Click to expand...

Yah you have to type/copy and paste some stuff into the config file for Afterburner to allow voltage adjustment. Nice OC. I was impressed in the scaling on the core. 950 to 1000 core is a 3% increase in FPS for me, alone, on Unigine Heaven.
 
so seems like new pcb design is out
it comes without black backplate and also no bios switch
6950 unlocking days are over
 
I can't get above like 930 core even with 1.3v core and +20 power control on my 6950 flashed to unlock. Hmm...
 
silent-circuit said:
I can't get above like 930 core even with 1.3v core and +20 power control on my 6950 flashed to unlock. Hmm...
Click to expand...

Have you tried a different bios? I seen someone try a different bios and get a higher oc just from doing that. Also are you sure your voltage is actually moving up. What are you using to monitor the adjustment. There are reports of sliders moving but the voltage stays put.
 
Lord_Exodia said:
Have you tried a different bios? I seen someone try a different bios and get a higher oc just from doing that. Also are you sure your voltage is actually moving up. What are you using to monitor the adjustment. There are reports of sliders moving but the voltage stays put.
Click to expand...

This is the ASUS 6950 Unlocked shaders BIOS I'm using, and I was using MSI Afterburner to adjust voltages. So far as I know this is the only shader unlocked 6950 BIOS out there, and I don't really want to do a straight flash to 6970 and risk issues from improper RAM timings. Oddly enough Kombustor shows 1.100 vcore no matter what I do, and it should be at least 1.175 after the BIOS flash... so not sure if I'm actually having any affect on vcore. Do some cards not support vcore modification? Fairly sure this is a reference card, it's a PowerColor, looks like a reference card.
 
silent-circuit said:
This is the ASUS 6950 Unlocked shaders BIOS I'm using, and I was using MSI Afterburner to adjust voltages. So far as I know this is the only shader unlocked 6950 BIOS out there, and I don't really want to do a straight flash to 6970 and risk issues from improper RAM timings. Oddly enough Kombustor shows 1.100 vcore no matter what I do, and it should be at least 1.175 after the BIOS flash... so not sure if I'm actually having any affect on vcore. Do some cards not support vcore modification? Fairly sure this is a reference card, it's a PowerColor, looks like a reference card.
Click to expand...

I noticed Kombuster doesn't report the correct voltage as well. Just enable voltage monitoring in Afterburner. It will add one more graph to the monitor window. That reports correctly for me at least.

The other option you have for a 6950 bios is to use the one that shipped with your card, mod it and flash it back to your card. Its very easy to do with the script provided at TechPowerUp. This just unlocks the shaders, it does not modify the voltage.
 
Well, Afterburner shows 1.3 when I sent it at 1.3, etc, and I'm hard-locking above roughtly 930Mhz core, so yeah, guess I just got a weak card. Might try another BIOS, maybe it's the ASUS thing messing with it, might unlock my stock BIOS and go from there since there's no real benefit (using the apps I am currently) to running the ASUS BIOS over any others.
 
You must log in or register to reply here.
Back
Top