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
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PCI link speed not showing
- Thread starter ScrappyCoco
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^^^^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
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
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).
I suspect that this is the way it is with non-Apple cards (as Lou pointed out).
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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.
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
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.