PCI link speed not showing

[ScrappyCoco]

hi i have a gtx 680 4gb in a 5.1 mac pro but im getting a error that says there was an error receiving pci information is there anyway to find out if my link speed is 5.0 instead of 2.5 because i have the latest nvidia drivers installed

 

[flowrider]

^^^^It's an known issue when using non-flashed (non EFI) Graphics cards. They report an error while trying to gather PCI card information.

I believe the Link Speed on 4,1 and 5,1 is full PCIe speed of 5.0 GT/s. A 3,1 Mac would only show 2.5 GT/s with a non-flashed card.

Lou

 

[Studio K]

I am using a GTX 650 (non-EFI card) and see the same message that you are seeing in System Information>PCI Cards.

I suspect that this is the way it is with non-Apple cards (as Lou pointed out).

 

[xcodeSyn]

... is there anyway to find out if my link speed is 5.0 instead of 2.5 because i have the latest nvidia drivers installed

You can download OpenCL OceanWave & Bandwidth Benchmark V 1.61 from here. It'll show the GPU link speed. Another way is to download CUDA Mac driver from NVIDIA site and CUDA-Z. Install CUDA driver before running CUDA-Z, and click the Performance tab to see the link speed in the Host to Device and Device to Host category.

 

[ScrappyCoco]

thanks. im at 5

 

[ScrappyCoco]

i have my card in the second 16x slot and i feel like this card is to heavy and is stressing on the slot by hanging in mid air any suggestions i dont think that metal screw bar does anything

 

[ActionableMango]

If you have Windows, flashing this card is very easy; I recommend it.

 

[ScrappyCoco]

If you have Windows, flashing this card is very easy; I recommend it.

How so?

 

[xcodeSyn]

How so?

If you use Windows in Boot Camp, an unflashed GPU only has 2.5GT/s link speed, but EFI-flashed GPU would get 5GT/s speed, same as in OS X. This thread has all the information you need, thanks to Dr. Stealth.