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Need advice between 2gb 6950 and 2gb 6970 crossfire

post #1 of 30
Thread Starter 
I have the money to upgrade my crossfire setup to either of these card combos. My question is would the 6970 set be worth the extra 150 bucks, power consumption and heat over the 6950 set. I have looked around the internet and have been finding mixed results but for the most part it looks like the 6950 and 6970 are very close in performance is very small. like 4-6 fps in most cases but those are with very old drivers. Thats what i hate about benchmarks. When the come out they use such old drivers. Like my 5830's. They were using such old drivers in those benchs that people always talk bad about them when in reality now they out perform the 5850 in the samebenchmarks by a long shot. Anyway i'm looking for someopinion and advice and maybe some experience with the two cards. Thanks in advance.

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GFX - XFire HD 5830's (OC 900/1300)
post #2 of 30
6950s without a doubt in my opinion.

I have 3 in crossfire, all have their shaders unlocked and run far faster than a stock 6970.

The 6970 has 2 benefits: you're guarenteed to have 1536 shaders, and they have different memory chips which are rated for higher frequencies.
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post #3 of 30
Thread Starter 
how do you unlock the shaders? how big of a performance increase will that get me? what brand do you have? also all benchmarks i see are using such old drivers. like 10.12 and stuff how are they running on 11.4+
post #4 of 30
Quote:
Originally Posted by geazy View Post
how do you unlock the shaders? how big of a performance increase will that get me? what brand do you have? also all benchmarks i see are using such old drivers. like 10.12 and stuff how are they running on 11.4+
This is how you Unlock Shaders:
http://www.techpowerup.com/articles/...ng/vidcard/159

BUT YOU HAVE TO have a Reference HD 6950, in my OPINION and my opinion alone I find it useless to unlock Shader's, as both my Reference Cards can do 1GHz with Voltage increase, while when you Unlock Shader's you lose out on Voltage Control. As far as numbers go it's only maybe a good 2-8% increase by unlocking the shader's which is about the difference from a stock hd 6950 and a 6970, you can get far greater numbers by just overclocking any HD 6950, or at least out of all my card's this is true for me. It's going to be hard to find a Reference 6950 and unlock it now as they do not sell them anymore to my knowledge, best bet is to find 2 HD 6950's and not worry about unlocking anything.
    
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post #5 of 30
Thread Starter 
Can you tell me what kind of performance your getting. With current drivers how are your battlefield Bad Comp 2 frames? All the old benchmarks for these cards are killing me. They all use 10.12 that i can tell and didn't 11.4 ccc give a huge performance boost to 6xxx cards.
post #6 of 30
Quote:
Originally Posted by geazy View Post
how do you unlock the shaders? how big of a performance increase will that get me? what brand do you have? also all benchmarks i see are using such old drivers. like 10.12 and stuff how are they running on 11.4+
There's only a 2% performance increase when you unlock the shaders on 6950.. so don't stress over it.
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post #7 of 30
I was dealing with the same choice as you, i couldnt find reference 6950 cards though. I figured i would just spend the little extra and get the 6970's. Even if i did find the ref cards, the overclocked 6970 will still beat it. And since im already spending close to 300 on each, i said screw it, might as well spend a bit more and get the better one.

/redundancy
    
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post #8 of 30
Your CPU will bottleneck those cards very hard though.
    
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post #9 of 30
Thread Starter 
Quote:
Originally Posted by Anthraxinsoup View Post
Your CPU will bottleneck those cards very hard though.
I really don't think so i'm running Eyefinity resolutions and 8xAA to 16xAA. Can anyone confirm this.
Edited by geazy - 7/19/11 at 6:59am
post #10 of 30
Quote:
Originally Posted by Krud View Post
I was dealing with the same choice as you, i couldnt find reference 6950 cards though. I figured i would just spend the little extra and get the 6970's. Even if i did find the ref cards, the overclocked 6970 will still beat it. And since im already spending close to 300 on each, i said screw it, might as well spend a bit more and get the better one.

/redundancy
Same here. I decided to go with the 6970 as well ... though my choice was for a single card not crossfire. You'd have to get a reference 6950 and the price between those and the 6970's are close enough that I'd vote you go 6970.
    
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