Hello, I had to sign up since I just went through this issue on my new build:
tem List:
Item Number: Item Description: Quantity: Price:
N82E16832116754 WIN HOME PREM 7 64-BIT ENG 1PK DSP 1 99.99
N82E16819115215 CPU INTEL|CORE I5 750 2.66G R 1 199.99
N82E16822152185 HD 1T|SAMSUNG HD103SJ 32M 7K % 1 89.99
N82E16817139005 PSU CORSAIR|CMPSU-650TX 650W RT 1 89.99
N82E16813128412 MB GIGABYTE GA-P55A-UD3 P55 R 1 129.99
N82E16820231276 MEM 2Gx2|GSKILL F3-10666CL7D-4GBRH 2 114.99
N82E16820167016 SSD 80G|INTEL SSDSA2M080G2XXX OEM 1 194.95
N82E16814125318 VGA GIGABYTE|GV-R585OC-1GD RT 1 309.99
N82E16827106289 DVD BURNER LITE-ON | IHAS124-04 % 1 19.99
I was getting nothing on boot; no beeps, just a quickly turning on and off of the main power. The odd thing was if unplugged the system would turn on for about 10 seconds, then turn off/on/off/on, but if I just rebooted the system it would happen almost immediately. All of the fans, HDD's, and DVD-drive seemed to be working so I was really worried (I build systems for friends/family about 4 times a year so I'm not an expert, but I'm also not a newb). I got really freaked out thinking it was the CPU overheating and turning off prior to damage but I took my time with the installation.
So after spending about 3 hours this morning and getting really upset I tried to remove everything one at a time. Fan headers, extra HDD, restart button, HD activity, nothing was working. Then I thought the ram could be the issue (again since there was no post beeps that would lend me to believe it was ram I didn't put much thought into this). After my last build almost drove me mad (1 of my 2 sticks of ram was bad), I always do the single stick in the proper slot (DDR3_1 on this mobo). I started playing musical chairs with the ram (I have a total of 8GB in 4 sticks). When I put the stick in either of the farther away ram slots DDR3_4 or DDR3_3 suddenly I was able to POST with no problem! I was so happy, until I did some more experimentation and believe both the DDR3_1 and DDR3_2 slots are faulty (I can do any combo of sticks (so I know none of my ram modules are faulty) in the 3 and 4 slots, but once I try to put anything in the 1 and 2 slots the system goes back to the no POST reboot-loop).
What this means is I can't run in dual-channel mode, and am going to have to likely RMA the mobo. That is the worst feeling to know you've blown a lot of hours building a system only to have to rip it all apart to RMA the mobo.
My last chance is going to see if there is a bios update that could fix this (if it is just a ram compatibility issue and not an actual damaged mobo).
So my recommendation is to try a single stick in the farthest away slot (DDR3_3) and see if that fixes the problem like it did for me.
HTH as I see a lot of other threads on this forum with people having the same issue.
Another issue I just found out about is these Gigabyte mobo's don't have internal speakers. A lot of newer mobo's have them, and unfortunately my case doesn't either, so I probably have been getting ram error beeps but just couldn't hear them.