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Z77 Mobo - Every socket pin is bent? - Page 2

post #11 of 21
Thread Starter 
Gigabyte Z77X-UP5 TH

Here's the relevant bit of the manual:



As you can tell...not the easiest thing to understand. I previously had 2 sticks in slots 1 and 3 (the rightmost 2 slots) but it seems you need the sticks to be in slots 1 and 2 to get dual channel. However when I try to use either slots 2 or 4 (with 1 stick of RAM even) I get no post at all. Slots 1 and 3 it boots Windows just fine. Hence the conclusion that Channel A is borked (the leftmost 2 slots). Either it doesn't like my ram (Geil Evo Corsa 9-9-9-24 1600) or there's something wrong with the mobo itself.
post #12 of 21
^ Try slots 3&4?
post #13 of 21
applaud.gif
post #14 of 21
Thread Starter 
Quote:
Originally Posted by XAslanX View Post

^ Try slots 3&4?

I've tried every combination possible with both 2 sticks and 1 stick (1,2,3,4, 1+2, 1+3, 1+4, 2+3, 2+4, 3+4). If any stick touches the leftmost 2 slots (Channel A) then it won't post. BIOS led gives "51" display.

Also tried going down to 1333 Mhz and turning off XMP.
post #15 of 21
Sounds like your board has bad slots. Run it with each DIMM separately to make sure its not just bad memory.
post #16 of 21
What is your P/S, are both the 24 and 8 pin PWR connectors plugged in, and have you confirmed they are seated properly?

Also are you getting any codes off the M/B?

Good Luck.
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post #17 of 21
Thread Starter 
Quote:
Originally Posted by zalophus View Post

What is your P/S, are both the 24 and 8 pin PWR connectors plugged in, and have you confirmed they are seated properly?

Also are you getting any codes off the M/B?

Good Luck.

51 is displayed by the mobo LED. Of course the manual doesn't say what that is, but google says it's memory related (well duh!).

I've ordered a set of G.Skill memory to try out that has been verified by them to be compatible with my mobo. If that doesn't work then I'm RMA-ing the mobo. If G.Skill memory does fix the problem then I'm going to try playing with the Geil timings more before putting them up on ebay.
post #18 of 21
I'm having pretty much the same issues with you man..my setup:

Z77X-UD3H( BIOS F18 ), vengeance 1600mhz LP 4x4 CL9..

When i boot with one stick(2x4) my mobo runs fine(rock stable)...but with three and four sticks i get bsod's ...also i get bsod when i boot with the other stick of ram(2x4).. <--i test them in another pc and they run just fine!

So i think my mobo is diffected..
post #19 of 21
if one channel doesn't work it could be a bent pin, water in the memory DIMM area, or just a defect in the board. In rare cases it is also CPU.

you can try update the uefi
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post #20 of 21
I have experienced tightening down the HSF too hard on the CPU can "cut off" some of the lanes from the memory. Try a very loose fit, just to see if it boots.
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