Okay so I had a AMD Phenom X4 955 BE and today I bought a FX8350 and put it on correctly everythings in order my mobo is a Gigabyte 990FXA UD3 with the newest bios so it supports the 8350 and when I set up everything turned on the computer and the GPU Fans spin and stop but its not the gpu since I tested it on my other PC then I tried RAM still didnt boot finally I reset the CMOS still no post I changed back to my old CPU and it didnt boot too(its a pain to change back and forth my cpus since my cooler is hard to install but everything went smooth) and yet still no post im leaning on a dead mobo but I really dont have money for a new one no HDD light when pc starts no monitor gpu fans spin and stop spin and stop someone experienced this before ?