Just installed a 16gb ram 2133mhz today and set the timing to 10 12 12 31 now my pc always crashed. do i need to more than setting up the timming?

Just wondering what bios you guys using and which one is stable? right now mine has 1703.

I just install another XFX 6950 to go crossfire and then when i power up my pc and went to my amd catalyst center there's no button that i can enable to. do i need to plug my gpu on both PCIEX_16 or is it ok to plug the second one on PCIE_8X?

I am thinking about upgrading to 8 core Amd FX 8150. you guys think is not going to mess up my pc being stable right now. My pc info:Mobo: Crosshair V Formula v 990fxCPU: Phenom II 1090T x6CPU Cooler: corsair H60GPU: XFX Radeon HD 6950 XXX BEMemory:...