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z77 board with PCIE 3.0 x16/x16

post #1 of 17
4/12/12 at 6:13am
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Are there any boards out there currently that have dual pcie 3.0 x16 slots for sli configurations? I plan on going multiple monitors here in the very near future and after seeing some benchmarks, I imagine the higher resolutions can really utilize the extra bandwidth of dual pcie 3.0 x16/x16, any help would be appreciated, thanks!
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post #2 of 17
4/12/12 at 6:16am
Thread Starter 
Now that I post that, it looks like the Fatal1ty Z77 Professional indeed has a x16/x16 configuration, any other ones?
edit. Ahh...looks like it only does x8/x8 in dual sli
Edited by y2kcamaross - 4/12/12 at 6:20am
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post #3 of 17
4/12/12 at 6:17am
Why?? It's pointless. Graphics cards these days are still barely able to max out PCI-E 2.0 x16, what more x32??
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post #4 of 17
4/12/12 at 6:24am
Natively no boards are going to support that because the CPU does the PCI-E lanes. The only way you get around x8/x8 is with a third party chip and the only Z77 board that can do that is the Gigabyte G1 Sniper 3
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post #5 of 17
4/12/12 at 6:28am
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Thanks and repped..now I have to patiently await the release of it
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post #6 of 17
4/12/12 at 6:49am
It's not a matter of the resolution, it's the fact that there isn't enough data to shuttle over the bus to realize a gain going from 8x to 16x. Up to now the difference between 8x to 16x in PCI-E 2.0 has been minimal to negligible, a 8x PCI-E 3.0 is more than enough for any modern GPU. That said, if you are carrying over multiple 2.0 devices it may make a difference.

If you really want the bandwidth it may be worth it to go X79. Although the add in chips are able to multiplex the 16 lanes into more it has a negative affect on latency.
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post #7 of 17
4/12/12 at 7:00am
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Go for ivy with the Z77 and pcie 3.0, The difference between pcie 2.0 and 3.0 is noticeable. Especially in sli/crossfire

The difference between 16x or 8x is irrelevent in 99% of cases, Unless you purely do bench runs

http://www.evga.com/forums/tm.aspx?m=1537816&mpage=1&print=true
Edited by Chewy - 4/12/12 at 7:05am
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post #8 of 17
4/12/12 at 7:08am
Quote:
Originally Posted by Chewy View Post

Go for ivy with the Z77 and pcie 3.0, The difference between pcie 2.0 and 3.0 is noticeable. Especially in sli/crossfire
The difference between 16x or 8x is irrelevent in 99% of cases, Unless you purely do bench runs

The difference between 2.0 and 3.0 is 2x the bandwidth. It is still on copper, still uses the same connection, still has the same number of traces, it is just clocked higher with a more efficient encoding algorithm. There is no improvement in latency, or anything else for that matter. The only time it would matter is during compute tasks.
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post #9 of 17
4/12/12 at 7:09am
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Quote:
Originally Posted by TickleMeElmo View Post

The difference between 2.0 and 3.0 is 2x the bandwidth. It is still on copper, still uses the same connection, still has the same number of traces, it is just clocked higher with a more efficient encoding algorithm. There is no improvement in latency, or anything else for that matter. The only time it would matter is during compute tasks.

That battle royale is the main reason i made this post, the differences were
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post #10 of 17
4/12/12 at 7:28am
Hey guys thought I would post some interesting test results that someone over at /r/gamingpc did.

Running battlefield with gtx 680 in sli PCIE 2.0 x16x16 vs PCIE 3.0 x16x16.


258

I think the biggest shock here is the difference at the minimum frame rate in a triple monitor set-up. A 20 frame difference (32 vs 53 on ultra, 40 vs 61 on high) seems to suggest having the increased bandwidth is doing wonders in this particular setup.

I wish the graph was laid out a little better but still informative non the less.'


*edit*

Just a note that the asus P8z77 WS will do PCIE 3.0 x16x16.
Edited by lInverse - 4/12/12 at 7:36am
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