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Nvidia shows x8, BIOS shows x16?

I7 2700k
Corsair Vengeance 8gb ddr3 1600mhz
Corsair Force GT 240gb ssd
Asus Maximus IV Extreme-Z motherboard
EVGA nvidia gtx 670
dvd writer

According to the nvidia control panel, my bus is running PCI-E x8 2.0, it should be PCI-E x16. The Bios shows PCI-E x16, but I'm confused on why I'm getting two different readings. Does anyone know if it's just a glitch, or if I really am running only at x8?
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  1. Best answer
    I presume your card is in the first PCIe slot. Try running a graphic stressing pgm like Furmark and see if it switches to x16 mode.
  2. I tried using furmark, and that didn't fix the issue, but I went in to check my NPU settings afterwards and it was disabled... so I re-enabled it and it works fine on x16; thanks for your help.
  3. Best answer selected by brethall222.
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