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GTX570 SLI vs. 6970 Crossfire - Page 3

post #21 of 48
I asked a similar question, but it was 570 vs. 6970 in single card configuration. 6970 has a vram advantage, so at higher resolutions it will pull away from the 570 pretty quick. In single card configuration, at least, the 570 and 6970 traded blows. Every review declared a different winner. With the 6990 release though, all the benchmarks have been re-done, and these cards can be compared on current drivers. It seems that at current gaming resolutions at least, a single 6970 is better than a single 570.

In the end, I went with a 2 gb 6950, as it can easily and reliably (96% success rate) be unlocked to 6970 specs. Also, the 6950 2 gb is a steal in Candada, $253 each (no MIR). The 570 certainly can't compete at that price.
    
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post #22 of 48
Quote:
Originally Posted by ZealotKi11er View Post
Look at it this way. HD 6970 and GTX570 ~ within 5% of each other depending on the review @ 1080p/1200p. They just did a review using CAT 11.1 HD 6950 CF vs GTX570s SLI and came to a conclusion SLI ~ 60% average scaling @ 1200p and CF 80%. HD 6970 is a Clear winner. In fact HD 6950 because of scaling its within 1-2fps of GTX570s, HD 6970 will easily win. They scale so way they challenge and beat GTX580s @ 1600p in some games. Drivers like 11.4 are making HD 69XX series even better where as GTX5XX they are just GTX4XX with better cooling.

Heres a picture from Sin's review of the 570, it shows a 96% SLI scaling in 3DMark11's GPU score when overclocked and a 102% increase from stock.
http://www.overclock.net/intel-gener...ew-sli-sb.html
I'm still not sure if I want to SLI mines or step up to a 580 yet.
Edited by LivingChampion - 3/16/11 at 1:57am
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post #23 of 48
Quote:
Originally Posted by LivingChampion View Post

Heres a picture from Sin's review of the 570, it shows a 96% SLI scaling in 3DMark11's GPU score when overclocked and a 102% increase from stock.
http://www.overclock.net/intel-gener...ew-sli-sb.html
I'm still not sure if I want to SLI mines or step up to a 580 yet.
This kid is so funny lol he keep thinking because the 570 score a little better in 3DMark it's a better choice LOL. You have a lot to learn if you keep basing GPU performance on 3DMARK.

Anyways, I'll play along with you.

http://www.tomshardware.com/reviews/...ng,2865-3.html

Tom hardware did a benchmark review on a single 570, SLI, and TRI vs a single 6950, CF, and TriCF. And yes as you can see the 570 score better on 3DMark but keep reading perhaps it'll make you less of a noob on topic such as this.

Remember the topic is 6970 vs 570 but the performance of the 6950 is already on par with the 570. It's also $80 cheaper, I think. Best bang for your buck running dual GPU is the 6950 not the 570. Only go Nvidia if you use Cuda or interested in pHsyx.
Edited by DaRookie - 3/16/11 at 2:23am
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post #24 of 48
FYI, Mutli GPU Scaling Analysis.



Uploaded with ImageShack.us



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Edited by DaRookie - 3/16/11 at 2:18am
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post #25 of 48
Benchmarkextreme did an extensive GTX570 scaling test at 2560x1600 over a range of 18 games.
As OP will move to 2560x1600 in the future, the result is a good reference.
Link:http://benchmarkextreme.com/Articles/GTX%20570/P21.html

As the first 2 graphs below show, 2-way SLI scaling index is 1.82 (out of theoretical max of 2.0) and 3-way SLI scaling index is 1.34 (out of theoretical max of 1.5).
These numbers are more accurate and realistic as they reflect an average of 18 games (vs 5 games used by Tom's).

From Tom's data (using x4 green bars of the 3rd graph below), 2-way Xfire is 1.92 while 3-way Xfire is 1.27 (1 + (244.87-192.34)/192.34).

So, on the scaling percentage of dual cards at 2560x1600, it is GTX570's 1.82 vs HD6950's 1.92 (and I suppose 6970 scales similarly).

My thought: As OP said ''Performance would be my first priority followed by stability (read: bug free usage)'', I suppose it is good to reflect upon OP's own experience with GTX470 SLI and HD6870 CF and then decide on the side with higher stability.


post #26 of 48
Quote:
Originally Posted by DaRookie View Post
It's almost identical setup as mine and it scores less with mine on the single P-score.
Edited by LivingChampion - 3/16/11 at 11:37am
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post #27 of 48
Quote:
Originally Posted by LivingChampion View Post
It's almost identical setup as mine and it scores less with mine on the single P-score.
So what's your point? Did you look at anything else beside 3DMark? They just tested five different games with three different resolutions and the results are very clear. I don't think I need to spell it out for you but stop recommending GPU base on 3DMark. Recommend them base on actual game performance.
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post #28 of 48
Quote:
Originally Posted by LivingChampion View Post
It's almost identical setup as mine and it scores less with mine on the single P-score.
I bet you have a good ole time playing 3Dmark all night long.
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post #29 of 48
Quote:
Originally Posted by DaRookie View Post
This kid is so funny lol he keep thinking because the 570 score a little better in 3DMark it's a better choice LOL. You have a lot to learn if you keep basing GPU performance on 3DMARK.

Anyways, I'll play along with you.

http://www.tomshardware.com/reviews/...ng,2865-3.html

Tom hardware did a benchmark review on a single 570, SLI, and TRI vs a single 6950, CF, and TriCF. And yes as you can see the 570 score better on 3DMark but keep reading perhaps it'll make you less of a noob on topic such as this.

Remember the topic is 6970 vs 570 but the performance of the 6950 is already on par with the 570. It's also $80 cheaper, I think. Best bang for your buck running dual GPU is the 6950 not the 570. Only go Nvidia if you use Cuda or interested in pHsyx.
I kept reading, couple samples of the OPs resolution:




Average performance over their entire testing:



Why exactly did you link the SCALING graphs, but forget to mention that even with better scaling.. the AMD cards are still SLOWER overall?
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post #30 of 48
Quote:
Originally Posted by Celeras View Post
Why exactly did you link the SCALING graphs, but forget to mention that even with better scaling.. the AMD cards are still SLOWER overall?
Robilar is going to a 30in panel so 1080P benches will be meaningless, besides the fact that those two games are quite green.
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