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Pcie 3.0?

post #1 of 17
Thread Starter 
I recently purchased a Z68A-G43 (G3) motherboard and an i5 2500k cpu. I'm confused as to how the PCI express 3.0 works. Would I only be able to really use it with an ivy bridge cpu? I saw a video on MSI's website that said a PCI-e 2.0 video card would still greatly benefit from being plugged into a PCI-e 3.0 slot. Is this true?
post #2 of 17
PCI-e 3.0 is only used with ivy bridge.

not sure that it would "greatly" benefit from a 2.0 being plugged into a 3.0 but it wouldn't hurt lol.
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post #3 of 17
Thread Starter 
Thanks for the quick reply.

I found the video on MSI's website.
http://event.msi.com/mb/Gen3/

At 1:30 he says "Even with today's PCI express 2.0 devices we can see amazing performance increases." Anyone know the specific reasoning behind this? Or is it mostly bs?
post #4 of 17
personally i don't think any card out right now is bottlenecked by 2.0 port at 16x so i think its just a gimmick.
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post #5 of 17
Is a marketing thing for now. 8X 2.0 ports dont show loss until huge 5xxxX2xxx res anyways. So unless you are doing eyefinity or triple monitors it makes no difference in the last gen lol.
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post #6 of 17
It's a gimmick. The strongest single GPU is a GTX580 right now, and even at PCIe 2.0 x8 its only held back between 1-3%. Which means a 16x slot (2.0) is more than enough for even a GTX590 / HD6990 right now (strongest single cards period, dual GPU).

PCIe 3.0 is just a gimmick as of right now. Nothing out there can benefit from it. And no, its not Ivy Bridge only, its a motherboard feature. Once PCIe 3.0 cards start coming out, it'll work in 3.0 mode. Just like those PCIe 3.0 cards will work just fine (and without much if any hit in performance) on a 2.0 slot.
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post #7 of 17
Thread Starter 
What a bummer. Should've registered on this forum before purchasing the board. Is there anything good about it that would give me a reason not to return it?
post #8 of 17
Quote:
Originally Posted by Vincele714 View Post
What a bummer. Should've registered on this forum before purchasing the board. Is there anything good about it that would give me a reason not to return it?
It'll support Ivy Bridge in the future?

What board is it?

EDIT:
MSI Z68A-G43. Yeah, it'll support Ivy Bridge in the future. Otherwise nothing really noteworthy. It's not going to overclock too terribly well being a weak 4 phase motherboard. You'll be lucky to hit 4.0-4.4GHz with that thing. Should've spent the extra 10 bucks on the ASRock Extreme3 Gen3 z68 honestly.
Edited by pioneerisloud - 11/1/11 at 11:25pm
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Junkyard
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post #9 of 17
Nothing wrong with the Mobo you got. You might eventually use the 3.0 spec slots.
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post #10 of 17
op listed it as a z68a-g43b i'm guessing its a msi board?

http://www.msi.com/product/mb/Z68A-G43--G3-.html
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