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pcie 3.0 card on pcie 2.0 performance

Tags:
  • Bottleneck
  • Graphics Cards
  • Motherboards
  • PCI Express
Last response: in Motherboards
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May 12, 2013 11:57:31 PM

So pcie 3.0 cards are backwards compatible with pcie 2.0 slots,
they work just fine.
But is there a bottleneck of some sort which might affect a pcie 3.0 card if I place it in a 2.0 slot?

thanks in advance. :) 

More about : pcie card pcie performance

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a c 91 U Graphics card
a b V Motherboard
May 13, 2013 12:17:16 AM

There is absolutely no bottleneck right now. Even a 690 will have the same performance on a PCIe 2.0 x16 slot as a PCIe 3.0 x16.

Right now, PCIe3.0 is only really helpful for SLI and Xfire setups.
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May 13, 2013 1:40:03 AM

DarkSable said:
There is absolutely no bottleneck right now. Even a 690 will have the same performance on a PCIe 2.0 x16 slot as a PCIe 3.0 x16.

Right now, PCIe3.0 is only really helpful for SLI and Xfire setups.


Since im running a single 650 ti boost, a 2.0 slot should be okay right?
I got confused when I read that pcie 3.0 has double bandwidth and stuff.
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a c 91 U Graphics card
a b V Motherboard
May 13, 2013 1:43:31 AM

BlackKbero said:
Since im running a single 650 ti boost, a 2.0 slot should be okay right?
I got confused when I read that pcie 3.0 has double bandwidth and stuff.


You could be running a 680 and be okay, yes.

PCIe 3.0 DOES have double the bandwidth of PCIe 2.0, but that doesn't matter, because there is no card yet that is bottlenecked by sixteen lanes of PCIe 2.0. (i.e. a standard pcie 2.0 slot.)
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May 13, 2013 6:07:27 AM

Quote:
there is no card yet that is bottlenecked by sixteen lanes of PCIe 2.0. (i.e. a standard pcie 2.0 slot.)


Since there's no card (yet) that can bottleneck it,
I guess buying a board with pcie 3.0 is considered as an early upgrade for more advanced cards later on, yes?
Thanks man, you're a great help :) 
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September 25, 2013 5:38:23 PM

DarkSable said:
There is absolutely no bottleneck right now. Even a 690 will have the same performance on a PCIe 2.0 x16 slot as a PCIe 3.0 x16.

Right now, PCIe3.0 is only really helpful for SLI and Xfire setups.


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September 25, 2013 5:39:12 PM

will it bottleneck a Titan?
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a c 91 U Graphics card
a b V Motherboard
September 25, 2013 5:50:54 PM

A four month necro... not the worst I've ever seen.

A titan will be perhaps 2% faster on a PCIe 3.0 x16 slot vs a 2.0, but if you're buying a titan, you'll be wanting to have an extremely nice computer to keep up with it.

...that being said, the titan is an absolute waste anyways.
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