the motherboard won't boot with the processor. the motherboard does one long beep and 2 short beeps with out memory, and one long beep and 3 short beeps without the graphics card. I had this same problem when I got my FX 8120 back in 2012, which was a bad processor, which I RMA'ed at the time and got a replacement, which worked. So I ordered a FX-8350, and a good cpu cooler, yesterday. Since the GA-990fxa-ud3 Rev 4 supports it.