I have had the P8Z68-V Pro for 2 days and was experiencing the following issues with all three bios versions (501, 606, 706) and with and without overclocking.
I have the 2600K CPU, DDR3-1333 Kingston Memory from the Qualified Vendor List and an ATI 4870X2 VGA.
- I sometimes boot the system to find that my PCIe 2.0 speed is set at 1X games will then run at 20 fps max and if i run the windows experience index i get 5.9 in Memory section. (PCIe transfer speed as measured by the Pcie speed utility is around 300mb/s between the Cpu and the Gpus).
If i put the system to sleep then upon waking up the link speed is 16X and performance is up to normal levels. PCIe transfer speed are up to around 5.8GBs ~~ 6GBs
However it would randomly drop back to either 1X or 8X or even 4x and if it happens during gaming then it is easily detected by a clear drop in framerates.
I first though it could be related to the Integrated GPU and to Virtu, so i disabled both yet it still occurs, i also tried setting VRM Duty Control to extreme thinking it could be related to a voltage drop without success.
Any help would be great as i first start having those issues with this board, the CPU, RAM and VGA were all running great on my previous P67 board.