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Sli on a i5 - Page 3

post #21 of 24
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Quote:
Originally Posted by defoler View Post
its a waste of pixels saying "another 580 is a waste" and so on.

Some people (me included) feel that having to "sacrifice" going from 8aa to 4aa so the game will be just a bit more playable from 50fps to 60fps, is missing something of the game.

Having the option to play metro at 8aa, dx11, physx and super high details, and see some monster drooling in full details as it comes rushing at you, makes it so worth it.
The game looks much more real and more fun.

For a person who plays solitaire and browse the web and that's it, sli is not what he needs. But for gamers, the more the merrier.
cheers
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post #22 of 24
Spending money to go from 1156 to 1356 is silly and nonsensical for gaming purposes.

The only website that does useful tests of GPU bottlenecking is Guru3D.com.

They ran GTX 580 3-way SLI at 2500x1600 on the fastest i7 processor available, and exposed a CPU bottleneck in that scenario. No one knows whether the bottleneck is CPU speed or architecture.

Bottom line, you would need a ridiculous amount of GPU power to bottleneck a reasonably overclocked i5 or i7.
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post #23 of 24
Quote:
Originally Posted by matrices View Post
Spending money to go from 1156 to 1356 is silly and nonsensical for gaming purposes.

The only website that does useful tests of GPU bottlenecking is Guru3D.com.

Bottom line, you would need a ridiculous amount of GPU power to bottleneck a reasonably overclocked i5 or i7.
On the first point I agree ... unless we're talking about a triple GPU setup.

On the 2nd point, I think benchmarkextreme.com and legionhardware.com have also done some great CPU bottleneck analysis.

On the 3rd point, I completely disagree, because I think you're imposing your own personal definition of 'bottleneck' into the discussion. If I OC my processor from 3.8 to 4.2, I can easily show, on a number of tests, that my FPS will increase. Vantage Performance (incl. the GPU score) is one, as are Crysis and Mafia 2 (even with both of them maxed out at 1920x1200).

If increasing your CPU clock increases the FPS AT ALL, then you HAVE a CPU bottleneck (at the lower clock) in the particular testing scenario at hand. It's really that simple. If you had NO bottleneck, then the FPS would not go up at all.

Your personal definition must be something more along the lines of a significant bottleneck ... which I would tend to agree with (although it's inherently subjective) ... but that is different from the term 'bottleneck', which is a very simple and objectively-defined term.
Edited by brettjv - 1/5/11 at 1:38pm
    
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post #24 of 24
Quote:
Originally Posted by matrices View Post
They ran GTX 580 3-way SLI at 2500x1600 on the fastest i7 processor available, and exposed a CPU bottleneck in that scenario. No one knows whether the bottleneck is CPU speed or architecture.
I would recommend you read their tests before you do any claims.

They are reviewing using the i7-965 at 3.75ghz. That is very far from the fastest i7 available, or any good OCing for tri-sli testing.

Also from self experience, testing even the 470s in tri-sli with 980x.
These aren't the top and most powerful cards, and even than when I go from 4.2 to 4.4 on the CPU, the scores go up by quite a bit on the GPUs scores or heaven score and so on.

When I run benchmark with SLI indicator, its almost full most of the time, and full some of the time even at 4.5ghz.
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