pcie 3.0 card on pcie 2.0 performance

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BlackKbero

BlackKbero

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May 27, 2012
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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. :)
 
Solution
DarkSable
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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BlackKbero

BlackKbero

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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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DarkSable

DarkSable

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Sep 27, 2012
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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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BlackKbero

BlackKbero

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

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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C

Collin Gray

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DarkSable

DarkSable

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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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mage7206

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Jan 6, 2015
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Happy new year necro! :p

came here to just figure stuff out about using pcie 3 in a 2 slot, and am hoping my new 970 will work well. But with the research I have done the titans are a pretty big waste recently. The new 970 and 980 have been compared to the titan black and they each have their advantages. Really the only time I would ever say you should get a titan, is if you have $10,000 for a build and you could get the titan z and a system to handle it.
 
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DarkSable

DarkSable

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They were a waste when they were brand new, too. :p

I wouldn't even bother with a titan Z - three 970s would give greater performance for 2/3 of the price.
 
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