Z77x-ud3h code 51 and 15


Just built a new pc this passed week

z77x-ud3h, i7 3770k, hd 7850, 128gb ssd, 8gb ddr3 1600, 600w psu switch to 700w psu

living in NJ and with sandy rocking this state lost power a couple of times think it destroyed my psu because the power switch on the board was flashing and after changing the psu this problem stopped. However now it wont boot to bios or win 7. get these error codes 51 then 15 with constant beeping and then shuts off and cycles through again. Have tried everything short of changing the cpu and mobo. The computer ran great for a week before this happened. Can anyone help me out?
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More about z77x ud3h code
  1. Hi,
    See if you can find in the manual the error codes.
    However, my guess is that you should RMA both motherboard and CPU. Or have them tested at a local shop.
  2. ok finally got it into bios with 1 mem stick in slot 3, will not work with two sticks in 1 and 3 or 2 and 4. will only load with 1 stick in either slot 3 or 4. also will run with graphics card. gonna try loading windows from ssd now see what happens. but in the mean time can anyone help me out and explain why i cant use both sticks.
  3. so i can boot into win 7 pro, but still cant run two mem sticks any suggestions?
  4. adc1986 said:
    so i can boot into win 7 pro, but still cant run two mem sticks any suggestions?

    same problem here except mine is new. Could only boot using 1 mem stick on slot 3 or 4. 1 and 2 never Works and 2 sticks also never Works. Even with 1 stick when it boots it doesn't get stable. I dont know if its a faulty mobo or memory incompatibility. the problem is i dont live in US, i bought this mobo on a trip to Orlando and now i'm stuck with it without being able to exchange or return.
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