*** Official HD6XXX Series Overclocking Thread ***

[CobraXP]

I don't mind using RBE to increase voltage anyway. I have 2 BIOSes, a normal one with 1.175v which yields 950 core, and another 'extreme' benching BIOS which has 1.35v and that allows about 1025 core.

Any higher than 1.35v is pointless for me, it doesn't give any considerable stability to higher clocks... due to temps i'm guessing.

I have 2 cards so it is a pain to flash. Not just taking them out but all the reboots with the changes plus add an extra reboot to disablng ULPS. I am seeing it is possibly though by editing a config file so its all good.

[Sgt.McRuff]

Using afterburner I'm running at 1.015v at 880c 1450mem on my 6970

Uses 50 watts less

[yaxo11]

my new toy sweating a bit

[Oztopher]

Using afterburner I'm running at 1.015v at 880c 1450mem on my 6970

Uses 50 watts less

That's quite interesting actually. If you look at it this way, 900 for me needs about 1.10v. Now if i were to try 880 like you, i would expect it to need about... 1.05-1.07. But maybe, it might actually need less. Considering the lower core clock and the lower voltage, temps would be mighty low, allowing it to possibly need even less volts? I'm gona try it

Edit: What did you set VID3 as? 25mv less than VID4?

Also, if this works as i think it might, then i would be able to have a more conservative fan speed table (i use trixx for that). As really, even 6950 clocks is all you (I) need, considering i'm only on 1680x1050.

Edit2: well, 1.025v won't do 880, 1.05v testing... <- 1.05v did it, passed a good 15 minutes of gpu tool stability tester, now to test in games.

[Erdei88]

If I might ask, is there a way I can get my Gigabyte HD6870OC supported for controlling voltage?
I tied After Burnert 2.1 Beta 6, Gigabyte OC Guru, Asus Smart Doctor, Sapphire Trixx, non of support voltage controll.

[Bullu$]

I have 2 cards so it is a pain to flash. Not just taking them out but all the reboots with the changes plus add an extra reboot to disablng ULPS. I am seeing it is possibly though by editing a config file so its all good.

U don't have to take them out, just use another command for atiflash

atiflash -f -p 0 xxx.bin (first card)
atiflash -f -p 1 xxx.bin (second card)

Still don't work with 1.3V, 1.275V it's ok with msi ab.

Wich bios do u use?

3DM11 P11372

[papatsonis]

anyone noticed how annoyingly the 1st gpu clock varies when DOWNvoltaging the card?(6950), even though powertune is set to +20%, when adjusting the voltage(in AB), the closer to 1.1 volt i set (<1.1) the lesser the clock fluctuations.. When i stress test them with occt gpu, the 2nd card stays at full clock, but the 1st varies between 561 and 800mhz

edit:
found a "quick and dirty" way to avoid this bug (dunno if happens to others though)
Set the desirable voltage in afterburner, move the powertune slider to -20% for both cards, APPLY, then move again to +20% for both, APPLY, and gpu1 clock now is constant.

edit2: it doesnt happen with 1 vga in the system, i can adjust every secodn a new value to voltage, and during occt gpu gpu clock stays solid.

[Sgt.McRuff]

That's quite interesting actually. If you look at it this way, 900 for me needs about 1.10v. Now if i were to try 880 like you, i would expect it to need about... 1.05-1.07. But maybe, it might actually need less. Considering the lower core clock and the lower voltage, temps would be mighty low, allowing it to possibly need even less volts? I'm gona try it

Edit: What did you set VID3 as? 25mv less than VID4?

Also, if this works as i think it might, then i would be able to have a more conservative fan speed table (i use trixx for that). As really, even 6950 clocks is all you (I) need, considering i'm only on 1680x1050.

Edit2: well, 1.025v won't do 880, 1.05v testing... <- 1.05v did it, passed a good 15 minutes of gpu tool stability tester, now to test in games.

Actually Im currently now running at 1.035v as I found out in heaven benchmark as soon as tessellation was added, weird artifacting happened. Also one of my games could make it also show instability at 1.015v. My card is water cooled which seems to help how low I can do with voltage.

But still that's a far away point from stock 1.175v

[Oztopher]

I kinda just gave up just stuck it to 900mhz 1.10v, and 1400 on the memory. I can run up to ~1475, but i just want to save on heat a little bit.

[Mysterfix]

anyone noticed how annoyingly the 1st gpu clock varies when DOWNvoltaging the card?(6950), even though powertune is set to +20%, when adjusting the voltage(in AB), the closer to 1.1 volt i set (<1.1) the lesser the clock fluctuations.. When i stress test them with occt gpu, the 2nd card stays at full clock, but the 1st varies between 561 and 800mhz

edit:
found a "quick and dirty" way to avoid this bug (dunno if happens to others though)
Set the desirable voltage in afterburner, move the powertune slider to -20% for both cards, APPLY, then move again to +20% for both, APPLY, and gpu1 clock now is constant.

edit2: it doesnt happen with 1 vga in the system, i can adjust every secodn a new value to voltage, and during occt gpu gpu clock stays solid.

You need to dissable CCC when using afterburner per wizzards instructions. Works fine without the 20% adjustment, if you dissable it and are still having issues try reinstalling the drivers. I was having the same issue at first but a fresh install of the drivers seems to have solved it.

[Gaul]

6950 @ 1GH/1500

[d4rk_ch1ld]

Nice memory clock is this core clock on stock volts?

[Gaul]

Nice memory clock is this core clock on stock volts?

core with v1.275-1.3v

and here, unlocked

[Bullu$]

http://3dmark.com/3dm11/455925

[Gaul]

[Bullu$]

[Oztopher]

Very nice scores there guys, better than i expected

What did you do different from the earlier vantage results to get better score? Install 11.1a?

[lowfat]

Is anyone using Afterburner 2.1.0 Beta 6 w/ HD69XX crossfire? As soon as I overclock w/ it, it causes GPU usage on the first GPU to peg @ 99% and not ever drop.

[Dahaka]

Good VGA i guess, first try with tweaks and stuff but crappy OS =/

[Bullu$]

[Dahaka]

I will try on xp and vista to get more cpu score =/.

Nice run there Bullu$.

[Bullu$]

Tnx,
Xp give me a higher score as u can see.

[tool_462]

Is anyone using Afterburner 2.1.0 Beta 6 w/ HD69XX crossfire? As soon as I overclock w/ it, it causes GPU usage on the first GPU to peg @ 99% and not ever drop.

I am and do not have that issue, using 11.1 drivers. Running 950/1450 (max it allows unmodded) with no issues.

[Oztopher]

3dmark vantage high preset 1.35vgpu.

[Bullu$]

P40935

http://3dmark.com/3dmv/2876507

X23711


X4603

http://3dmark.com/3dm11/493016

E16718

http://3dmark.com/3dm11/493087