PCI Express 3.0 graphics card in a 1.0 slot

[sandbox242]

I'm planning on putting an r7 260x in an old computer with a motherboard that has a PCIE x16 1.0 slot, but the graphics card is a 3.0 interface. i know they're backwards compatible, but i want to know how much, if at all, would the performance of the card drop? also if there's a specific graphics card you recommend that has similar performance to the r7 260x that would work well with a 1.0 slot. I've read that using a newer card on an older pcie slot wouldn't be able to give enough bandwidth and there could be a 15% performance decrease. others have said it'd decrease drastically and some people say there will be no performance difference.

 

[Dark Lord of Tech]

http://www.youtube.com/watch?v=1XNI1GactP8
PCI-e 1.1 vs 2.0 vs 3.0 Technical Demonstration

 

[basdxz]

There will most likely be a noticeable performance drop. May I ask what CPU you are using?

 

[sandbox242]

There will most likely be a noticeable performance drop. May I ask what CPU you are using?

phenom II x4 840 3.2 ghz. i figure a 260x or 270 would be good and wouldn't bottleneck, but i could be wrong.

 

[sandbox242]

http://www.youtube.com/watch?v=1XNI1GactP8
PCI-e 1.1 vs 2.0 vs 3.0 Technical Demonstration

so it looks like only a 2% decrease in performance. that's reassuring.

 

[meat_loaf]

There will most likely be a noticeable performance drop. May I ask what CPU you are using?

phenom II x4 840 3.2 ghz. i figure a 260x or 270 would be good and wouldn't bottleneck, but i could be wrong.

For that CPU there might be a slight bottleneck. Since I'm using a Phenom II 955BE with R9 270, at stock clocks the processor do see maybe 2-5 fps difference compared to overclocked settings depending on the games. So if you overclock your CPU then it should be fine. But putting a PCIe 3.0 card into 1.0 slot isn't a good idea since the bandwidth isn't big enough. If you have a 2.0 slot then it wouldn't be that case. Mostly assuming in an example at 60 FPS, 1.0 slot may see as much as 5-7 fps difference in a game.

 

[sandbox242]

There will most likely be a noticeable performance drop. May I ask what CPU you are using?

phenom II x4 840 3.2 ghz. i figure a 260x or 270 would be good and wouldn't bottleneck, but i could be wrong.

For that CPU there might be a slight bottleneck. Since I'm using a Phenom II 955BE with R9 270, at stock clocks the processor do see maybe 2-5 fps difference compared to overclocked settings depending on the games. So if you overclock your CPU then it should be fine. But putting a PCIe 3.0 card into 1.0 slot isn't a good idea since the bandwidth isn't big enough. If you have a 2.0 slot then it wouldn't be that case. Mostly assuming in an example at 60 FPS, 1.0 slot may see as much as 5-7 fps difference in a game.

well i can't overclock with the board i have, but i think the 260x will do fine.