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6950 OC real world gain?

post #1 of 36
Thread Starter 
While overclocking my card I kept thinking of posts I've read here stating that overclocking a 6950 isn't much of an FPS boost.
Is there any real gain other than benchmark scores in oc'ing a 6950?

And what is a good OC for this card?
http://www.newegg.com/Product/Produc...82E16814102914
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post #2 of 36
Before you OC it, you should unlock the shaders. 950Mhz is pretty good for them.
post #3 of 36
Thread Starter 
ok, well when I decided to stop the overclocking process, I was at 961/1400 @ 1.19v with temps in the mid 70's. I'm using the MSI fan control for speeds.

And again, why unlock the shaders, or flash to 6970 or overclock. I'm inclined to OC just because I can but is there really any real world benefit other than benchmarks?
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post #4 of 36
-3Dmark11 Performance Setting

6950 Stock: 4652
6950 OC: 5078

6950 Shader Unlock: 4765
6950 Shader Unlock OC +20% PC: 5202

6950 w/ Full 6970 Unlock +20% PC: 5414

(+%20 PC = Power Control in CCC, this is very important to stabilize the 6950 and prevent damage)

- The difference between a Stock 6950 and a Shader Unlocked 6950 is a wash. I gained exactly 1fps during canned benchmarks. The same goes for the 6950 OC vs the 6950 Shader Unlocked OC.
The noticeable gain was achieved when going from a 6950 Stock to a 6950 Shader Unlocked OC obviously. There's has to be a 500pt.+ increase to see a benefit in real world gaming.

-Canned Benchmarks

There's no reason to run benchmarks between 6950 Stock and 6950 Shader Unlocked so I choose the three extremes.
6950 Stock vs 6950 Shader Unlocked OC vs 6950 Unlocked w/ 6970 bios.

System:
i7 930 @ 3.8GHz
RAM: 1400MHz
Resolution: 1920x1080
GPU: MSI 6950 using the Stock Bios, Sapphire Shader Bios and Sapphire 6970 Bios
(OC GPU clocks are the same as a stock 6970)

F1 2010 - DX11
8xMSAA, All Details Maxed
6950 Stock: 57 Avg. / 52 Min.
6950 Shader Unlock OC +20% PC: 63 Avg. / 58 Min.
6950 w/ 6970 Bios +20% PC: 63 Avg. / 58 Min.
6950 Stock OC +20% PC: 62 Avg. / 57 Min.

Alien Vs Predator Benchmark v1.03 - DX11
Default Settings
6950 Stock: 58.8
6950 Shader Unlock OC +20% PC: 65.3
6950 w/ 6970 Bios +20% PC: 65.7
6950 Stock OC +20% PC: 63.1

Mafia 2 - DX9
Max Settings - Physx Off
6950 Stock: 54.5 Avg. / 200 Max / 18.5 Min.
6950 Shader Unlock OC +20% PC: 57.7 Avg. / 200 Max / 20 Min.
6950 w/ 6970 Bios +20% PC: 57.3 Avg / 250 Max / 18.5 Min.
6950 Stock OC +20% PC: 56.7 Avg / 200 Max/ 20 Min.
(+%20 PC = Power Control in CCC, this is very important to stabilize the 6950 and prevent damage)

Conclusion:

Looking at the benchmarks, it's clear that the 6950 Unlocked Shader OC yields the same results as the 6970 Bios. The 6950 Unlocked Shader OC only resulted in a 1-2fps difference over Stock OC in F1 2010, Alien vs Predator and Mafia 2.

I stole the above info from harforum thanks to WORLDEXCLUSIVE for the testing.

Seems like the way to go is just to overclock unless you want to squeeze the extra couple of frames with the shader unlock.

The 6970 flash is pointless IMO.
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post #5 of 36
Most of the time, the memory will gain you more performance (% over stock) but if you unlock the shaders you should get about 3-4% more (over stock). Most 6950s can do around 900 at stock and around 1400-1450 on the memory
    
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post #6 of 36
You don't flash the 6970 bios onto the 6950 because the 6950 memory has different timings which will make the card unstable if using the 6970 bios. You just unlock the shaders on the 6950 bios. It will make the card perform almost identical to a regular 6970.
post #7 of 36
i did the flash... better kombustor scores.. in the neighborhood of 200pts.. Avg of 80 fps.. So it worked fine for me.. thats at the stock 880
    
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post #8 of 36
I can run 1520 on my VRAM and run furmark alright

The only 2 games that I use 947/1520 @1.2V for is GTA4 and CrysisWH

And I do notice a difference, I don't remember how big, but I find it worth it
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post #9 of 36
I run 950/1440 @1.15V and I noticed that increasing the memory resulted in more a performace increase in games than core but I'm not so sure. Can anyone confirm this?
Also I don't have my power play control on +20% because:
1. It changes back to 0% (I'm guessing its AB)
2. I changed the voltage in AB
Do I need to have it on +20%?

P.S sometimes when I open AB CCC flashes open than the overdrive **** inside flashes like mad.
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post #10 of 36
Quote:
Originally Posted by Fortivo View Post
I run 950/1440 @1.15V and I noticed that increasing the memory resulted in more a performace increase in games than core but I'm not so sure. Can anyone confirm this?
Also I don't have my power play control on +20% because:
1. It changes back to 0% (I'm guessing its AB)
2. I changed the voltage in AB
Do I need to have it on +20%?

P.S sometimes when I open AB CCC flashes open than the overdrive **** inside flashes like mad.
I've heard the memory is weaker on the 6950's compared to the 6970's but only testing will tell what yours can handle.

At the start I had the memory really high (even up to 1500 before it crashed in Crysis2 lol)

Just do a couple of tests of 950/1440 then try 950/1350

I don't have my power up 20% either.

Not too sure why it would need an extra power when only unlocking shaders so i presume it's safe, don't bet on it though i could be wrong.

Maybe someone else has advice on the 20% thing.
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