Hi, Sometimes when I boot up my computer, POST will be very slow and so will windows. Furthermore, when I get into windows the screen, the monitor will dim in and out very slowly, when entering and exiting windows. After, I restart once or twice, then everything works fine again. I have pushed my Intel I5 2500 from 3.3GHz to 4.0GHz, with a 105.3 BCLK and 41X multiplier. However, I don't remember if I had this problem before or after the oc. It would pass IntelBurnTest on Extreme at 10 times and only hit 77C without BSOD, Freeze or anything. I don't know what is going on. Ever sense I got my mobo replaced, I have only oced with the multiplier at 41X, which is 3.8 and I still have the same issue. I have tried almost everything I can think of, replaced mobo, different keyboard, new psu, new case, flashing to different BIOS versions. Also, my cousin used my video card without issues, so it is fine. Two of my ram stick stop working and caused my computer to power loop or BSOD. My sound card, died on me. I have run Intel Processor Diag Tool without issue, HD test without issue, I may have a problem with the ram I have because it's not in the memory compatibility list for mobo or memory manufacture. Moreover, I think it may be my optical drive, processor, ram or something else. I am tempted to RMA my cpu, to see if that is the issue. I am waiting for my ram to get back from Patriot that is on my mobo compatibility list. Any help or advice would be welcomed, thanks.