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Nvidia Titan SLi Bottleneck?

post #1 of 9
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With a setup like Nvidia Titan in SLi I have read that the cpu can be the bottleneck? how true is this? and if it is then
what would be the best setup for a Nvidia Titan SLi a Z77 (i7 3770k) or X79 (i7 3930k)? ( Also note running at 2560x1600 resolution. )
post #2 of 9
Realistically, if you are in a positon to choose then definitely get a 3930k. Far more headroom for those Titans. Not that the 3770k can't handle them but you'll get better results with the 3930k.
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post #3 of 9
Quote:
Originally Posted by Jameswalt1 View Post

Realistically, if you are in a positon to choose then definitely get a 3930k. Far more headroom for those Titans. Not that the 3770k can't handle them but you'll get better results with the 3930k.

X79 has more PCIe lanes to cope with the extra bandwidth the titan needs. 3770k can deal with it, but can only do X8 x8. x79 can do x16 x16. The triple slot ones can do x16 x16 x8. It is nice having those 40 PCIe lanes on the 3930k.
Edited by Lord Xeb - 4/6/13 at 8:59pm
 
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post #4 of 9
Quote:
Originally Posted by Jameswalt1 View Post

Realistically, if you are in a positon to choose then definitely get a 3930k. Far more headroom for those Titans. Not that the 3770k can't handle them but you'll get better results with the 3930k.

idk about SLI but for single GPU
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post #5 of 9
If you have money to buy $2000 of video cards then the extra $250 over the 3770k for the 3930k shouldn't be a problem. Go all in.
post #6 of 9
Quote:
Originally Posted by Derp View Post

If you have money to buy $2000 of video cards then the extra $250 over the 3770k for the 3930k shouldn't be a problem. Go all in.
 
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post #7 of 9
Quote:
Originally Posted by tx-jose View Post

idk about SLI but for single GPU
Warning: Spoiler! (Click to show)

i7-3960X "OCed" to 4.0GHz?! Seriously? That is a joke. Anyone with at least a halfway decent air cooler should be able to safely and reliably hit 4.6GHz by just raising the Vcore and multiplier.

I consider 4.2GHz as the base clock for my i7-3930K, and in my opinion there is no reason to not at least dynamically clock it that high. 4.0GHz, while technically being an OC, I basically consider to be an underclock.

They either have the worst 60X ever (or possibly the other components like the motherboard were bad), or they were intentionally setting up biased test results, since there is no way they couldn't otherwise easily push that CPU higher.

...

Not that it would have really mattered much for one card, but also PCIe gen. 3 isn't officially supported on X79 CPUs (though it has only worked flawlessly for me), and they might have forgotten to use the NVIDIA patch to enable it.
Edited by Wrend - 4/6/13 at 10:14pm
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post #8 of 9
I'd go with the titan, because single card is always better than SLI plus there is SLI headroom if you wanna upgrade later.
I would also go with the 3930k as well especially because if you get a new ASrock board (11 I believe) you can have x16/x16/x16/x16!!

http://www.newegg.com/Product/Product.aspx?Item=N82E16813157327
    
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post #9 of 9
How can you have 4 cards running at 16x on 40 lanes?

Edit: OK, I just checked it out. Not something I'm familiar with though, so I'll leave it at that.

...

Either way, the sweet spot seems to be 2-way SLI, which 40 lanes covers.
Edited by Wrend - 4/6/13 at 10:24pm
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