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*** The Official ATI Radeon HD 6950 Overclocking Thread ***

I did that.

I first downloaded the proper version and had this

Code: 
[ATIADLHAL]
EnableUnofficialOverclocking	= 1
AccessibilityCheckingPeriod	= 0

Then I downloaded the beta and tried this;
Code: 
[ATIADLHAL]
EnableUnofficialOverclocking	= 1
AccessibilityCheckingPeriod	= 0
UnofficialOverclockingEULA      = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode      = 1

To no avail. Perhaps it is a limitation of the Powercolour card?
 
al4x said:
boo, my 6950 flash cant even seem to finish the 3dmark basic bench at 20% ccc power slider, boo, temps are fine.. i have a poor card lol, my 5870 was poor too
Click to expand...

Keep that to 0% as it only helps in Furmark from what I've read so far. Saying that, putting it at 20% gave me slightly less of a score. It was minimal though but less is less.

Andrei23 said:
yeah I've pretty much given up on the idea of flashing/modding my HIS 6950 as it is not stable and crashes after a while no matter what I try to do to it. I keep it as a 6950 oced to 880/1325 and it runs stable as a rock! So far my experience with AMD both CPUs and GPUs is that you get what you pay for... however I am pretty happy with the card as it is
Click to expand...

You need to unlock the shaders only. I've said this to you I think twice already in different threads. As has Gareth.

Use your original BIOS and then use the unlocking script. That will keep your 6950 memory timings perfect yet give you the shaders of the 6970. My HIS 6950 didn't like the 6970 memory timings either so I had to switch back to the 6950 BIOS due to graphical tears and lines appearing.

Now I just change my voltage to 1.175v in Radeon BIOS Editor and run at 950Mhz/1450 for gaming and 975/1500 for benchmarking. I can hit 1000Mhz core with 1.225 but I've not tried up to 1.300 yet and I don't think I'm going to either as the gains would be minimal compared to a big jump in heat.

Before I used the voltage change from 1.100 (6950 default voltages), I could only run 890Mhz core. With it at 1.175 I can hit 950/975. So Al4x, that's what you need to do to get a better clock.

My card is fine just like yours is. You just need to understand the card a bit better and do a little reading. My card at the same voltages as yours reached about the exact same overclock as yours did ;). All is well, you just need to increase voltages and watch temps.

If you don't know how to Unlock your shaders then send me your BIOS and I'll send you it back unlocked. Message me in Trust.

MikeHiow said:
I can't seem to get over 840Mhz (CCC Limit), even with MSI Afterburner. Is the MSI tool only for MSI cards? Is there something else I can try?
Click to expand...

Download the BETA 6 version and just change the UnofficialOverclocking to 1 in the ".cfg". I've not tried BETA 7 but I'm using BETA 6 and it's all fine here.
 
J[B said:
You need to unlock the shaders only[/B]. I've said this to you I think twice already in different threads. As has Gareth.

Use your original BIOS and then use the unlocking script. That will keep your 6950 memory timings perfect yet give you the shaders of the 6970. My HIS 6950 didn't like the 6970 memory timings either so I had to switch back to the 6950 BIOS due to graphical tears and lines appearing.

Now I just change my voltage to 1.175v in Radeon BIOS Editor and run at 950Mhz/1450 for gaming and 975/1500 for benchmarking. I can hit 1000Mhz core with 1.225 but I've not tried up to 1.300 yet and I don't think I'm going to either as the gains would be minimal compared to a big jump in heat.

Before I used the voltage change from 1.100 (6950 default voltages), I could only run 890Mhz core. With it at 1.175 I can hit 950/975. So Al4x, that's what you need to do to get a better clock.
Click to expand...

I tried both 6970 flash and shaders mod, don't worry. Flashed without any problems. However, my pc acquires a tendecy to crash if I do any of the above - when playing games/benchmarking, so I gave up on the idea and just gave it a 10 percent oc on the core. It still tears through anything I throw at it at 1080p
 
Andrei23 said:
I tried both 6970 flash and shaders mod, don't worry. Flashed without any problems. However, my pc acquires a tendecy to crash if I do any of the above - when playing games/benchmarking, so I gave up on the idea and just gave it a 10 percent oc on the core. It still tears through anything I throw at it at 1080p
Click to expand...

:o I'm sorry, I got you mixed up with Al4x there. :o

Maybe it's heat related?. Did you increase the fan speed?.

Also did you raise voltages when you went back to 6950 BIOS as I couldn't hit 900Mhz core with stock voltages?. 1.175v and I can hit 950 on the core and tested with Crysis (playing not the benchmark). Mine never crashed on the benchmarks at 975/1500 but did so in Crysis so I backed down to 950/1450 and I was playing for about an hour or two.

If you're happy though, just keep on doing what you're doing. I just wish I could get my hands on your card to tinker :D. OCD I think lol :(.
 
6950.jpg


Unlocked 900/1400
 
gropingmantis said:
Unlocked 950/1400. And I'm not finished yet, trying to work out how it managed to go from 137-4 fps :confused:.
Click to expand...

You need to let the benchmark loop a couple of times as you get a lower min FPS if you do it first time. When I start it up I just let it run through and then after one run, I benchmark the second run. Some people wait for 3 runs but I'm not that patient.

Could you do me a favour please and run this at 1600x1200 if possible, if you can't use that resolution then 1680x1050 will be fine. It's just that this screen I'm using only lets me use up to 1600x1200 although my screen is capable of 1920x1440. That's what happens when you clutch onto CRT gaming screens :D. With any Nvidia card the proper resolution shows up :(.

I'm just interested in seeing your score as you have SandyBridge and your clock is near to mine.

newheavenscore.jpg
 
gropingmantis said:
Just ran Heaven again on 1920x1080 and 1600x1200 and I'm getting much worse results. 1100 for 1920x1080 and 1200 for 1600x1200. What the hell is going on??
Click to expand...

Lower the memory to stock and try again. The prob appears to be memory timings too tight for the ram chips (different spec chips on the 6950 and the they can't handle these 6970 timings.) There is a modded bios floating around here that unlocks the shaders, but leaves the Vram timings at 6950 levels.
 
Card sorted now and back running at 950/1400 stable now so here are Heaven benchmarks at 1920x1080 and 1600x1200 for J.D

82205388.png


That's with a 2500K turboing to 3.4 which is the multiplier limit for my motherboard. Roll on P67 mITX!
 
Last edited:
I got one of these cards and flashed it with the 6970 bios and it ran fine with no problems but I didn't use it that long as I heard it can cause problems w/e. So now I'm trying the modded 6950 bios with the unlocked shaders and have o/cd to 880 1375. However now it's way hotter than it was using the 6970 bios at the same speed. Is that weird or normal?

With the 6970 bios it idled at about 37 degrees with 28% fan speed (I have the powercolor card) and now its 50 degrees pretty much constant with the fan around 38%, which seems a lot to me. Not to mention the fan sounds like a vaccuum cleaner so I don't really want it that high all the time.

What is everyone else's like?
 
No I wasn't just the bios. I didn't overclock it any further.

I've got the beta now but it wont let me save any changes I make. As soon as I click apply it just goes back to the defaults. :mad:
 
Ok I fixed it gotta have ATI overdrive enabled. And the temperatures seem normal now. Thanks for your help.:D
 
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