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CPU won't let me use PCI-E 3.0!?! Please. HELP! - Intel Core i7-2700K

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March 27, 2013 3:05:01 PM

Alright so basically I posted a thread on the graphics and displays forums earlier, if you's want to know every intricate detail visit the thread - http://www.tomshardware.co.uk/answers/id-1636487/intel-...

Anyway I've got a Intel Core i7-2700K, and on the thread I was wondering if that could run a gtx titan - i got some mixed answers. But then someone came along with the answer telling me that it would somewhat bottleneck because the CPU! does not support my MOTHERBOARDS PCI-E 3.0 slot.

To me this did not make sense I thought that would be ran off the motherboard, so basically he said I would only get a PCI-E 2.0 slot benefit sort of thing because the cpu does not have a pci-e controller or something.

So the question is, is this guy right?

Cpu - http://www.amazon.co.uk/Intel-i7-2700K-Processor-HyperT...

Mobo - http://www.amazon.co.uk/gp/product/B005T3TLM6/ref=oh_de...

Setting me straight on this would be appreciated guys. I mean I got that cpu because I thought it would be future proof lol, but apparently if what this guy alleged is true then.. That would suck :( 
a c 177 à CPUs
March 27, 2013 3:12:07 PM

yes the cpu needs to be compatible for pci-e 3.0, sandy bridge the 2700k did not have pci-e 3.0 as it was not out and i believe, ivy bridge was the first intel to use it. It is not available on the sandy bridge cpus, and only the updated Z68 boards like urs, to utilize this u will need a ivy bridge cpu.

I know u looked for the details for pci-e 3.0, but the performance gain is minimal, so id just deal with the 2.0 slot. I know u got a titan and want its full power but with a titan are u rlly going to lose that much performance from the pci-e slot?
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March 27, 2013 3:12:26 PM

You need an Ivy Bridge CPU to take advantage of PCIe 3.0 and USB 3.0. You'll want something in the 3000 range, like an i5 3550.
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March 27, 2013 3:14:12 PM

F * * K. Alright thanks for putting me out my misery guys lol, damn that hurts lol...
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a b à CPUs
March 27, 2013 3:17:12 PM

It comes down to bus speed. The ivy Bridge cpu's are built to allow the higher bandwidth that is needed to support pci-e 3.0.
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a c 101 à CPUs
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March 27, 2013 3:19:35 PM

Gardnersworld1 said:
Anyway I've got a Intel Core i7-2700K, and on the thread I was wondering if that could run a gtx titan - i got some mixed answers. But then someone came along with the answer telling me that it would somewhat bottleneck because the CPU! does not support my MOTHERBOARDS PCI-E 3.0 slot.

To me this did not make sense I thought that would be ran off the motherboard, so basically he said I would only get a PCI-E 2.0 slot benefit sort of thing because the cpu does not have a pci-e controller or something.

So the question is, is this guy right?

Yes and no. He's right insofar as the connection will be at PCIe 2.0 bandwidth. However, it won't necessarily bottleneck. At least it isn't likely to be all that much. A GTX 680 sees practically no performance difference between PCIe 3.0 and 2.0. The Titan is of course more powerful, so it might hinder performance a little. But I doubt it would be a major problem, and for all we know it might make practically no difference for the Titan too.
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March 27, 2013 3:21:52 PM

That is what I though lazyboy, but the guy over at the other thread posted a chart - basically it shows I would like 1gh of its memory clock or something. But again thanks for cleaning that one up folks.
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a c 101 à CPUs
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March 27, 2013 3:34:24 PM

Here's an article about the impact of PCIe bandwidth for the GTX 680 and AMDs Radeon HD 7970:

http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI...

Quote:
The new PCI-Express 3.0 interface can provide around 1% performance boost for both HD 7970 and GTX 680. While this confirms that both cards provide working support for Gen 3, such a small improvement is clearly not worth worrying about. It certainly does not warrant buying a new processor or motherboard.
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March 27, 2013 3:45:10 PM

Sakkura said:
Here's an article about the impact of PCIe bandwidth for the GTX 680 and AMDs Radeon HD 7970:

http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI...

Quote:
The new PCI-Express 3.0 interface can provide around 1% performance boost for both HD 7970 and GTX 680. While this confirms that both cards provide working support for Gen 3, such a small improvement is clearly not worth worrying about. It certainly does not warrant buying a new processor or motherboard.


Wow, what can i say, thanks for looking into that for me man, that truely has put me at ease lol. However it still it pretty grim that this cpu - http://www.amazon.co.uk/Intel-Generation-i5-3570K-3-40G... is better gaming wise and was £150 cheaper than my cpu at the time :(  much obliged for finding that article though pal ;) 
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March 27, 2013 3:51:33 PM

Good job Sakkura - PCI 3.0 is not needed .... yet. I would love to have i7-2700k/Titan - nice!!!!!
-Bruce
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April 25, 2014 10:13:50 PM

You can still put the graphics card in the slot and have it function though, right?
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a b å Intel
April 26, 2014 3:34:59 AM

You should have asked in a new thread.

But anyway, PCIe 2.0 and 3.0 are fully compatible, so it will function in a 2.0 slot too. And the performance difference is probably going to be very minor, nothing to worry about.
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