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How do you change the PCI Video Bus speed?

Specifically from 3.0 mode to 2.0 mode, I can't seem to find it in the BIOS.

ASUS P8Z77-V LK -- Intel Z77 Chipset
Intel Core i5-3570K 3.40 GHz LGA1155 CPU
PC POWER & COOLING SILENCER MK II 950WATT PSU
8GB DDR3 1337 MHz RAM
EVGA GeForce GTX 570 1280MB GDDR5 PCIe (x2)
Windows 8 Pro 64-bit
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More about change pci video bus speed
  1. Best answer
    You cant change it, mainly because there absolutely no need to. Pci-e 2.0 cards work fine in 3.0 slots and vice versa.
  2. bignastyid said:
    You cant change it, mainly because there absolutely no need to. Pci-e 2.0 cards work fine in 3.0 slots and vice versa.


    can you change it for the new versions? my z77 mobo with the new r9 series from radeon is running in x1 mode for the pci-e and i wonder if i can change it to the 16x capability or if it is auto. (I am hoping you know because you came up with this last great answer when i was on google search)
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