GA-P55-UD5 no POST.... x2

[Transeau]

Hello All.

I've having an issue that is making me feel like a moron. At this point I have two nearly computer boxes because I have bought doubles to figure this out.

I've built a nice box with the following:

GA-P55-UD5
Intel Core I7 860
4x Crucial 2GB DDR3-1333
4x WD Black 750
Antec 800W PS
2x EVGA GTX 275

After building it, I had no POST, just a constant power cycle and DIMM_LED.
If I pulled the memory and leave only a single DIMM in DIMM_1, it will not power cycle, but just powers up with the DIMM_LED. No beeps at all.

I've done the following:

1 - Reseated CPU, tried different cooler
2 - Reseated Memory
3 - cleared CMOS - took out battery, pulled power, left over night

After that didn't work, I picked up a second board, processor and memory. Board and CPU were the same, memory is kingston (also DDR3-1333).

I benched the second set of parts and used a cheap ATI PCIe video and a Mushkin 500W PS.

I got the same results! Still No POST - just a power cycle and the DIMM_LED is on.

So... WTF am I missing???

I've been a PC tech for more than 15 years. This is the first Core I7 I've built. I can't let this thing beat me.

Oh, and I'm 100% sure the board is mounted correctly - no shorts. Second board is on a cardboard box.
Also - MD1, MD2, GD1, GD2 are all 4 lit solid. When I called Gigabyte, they stated that they simply mean that the board is getting power. Though posts I've read here say that it mean an over-voltage. So, which is it?

[wazza300]

Re: GA-P55-UD5 no POST.... x2

on your psu you know the 8pin cpu connector? can you split it into four pin block and try that?? it will only go in one way at the top leaving four empty slots below,i ran my ud5 with just four pin so i know it works fine.....just to eliminate cpu over voltage if it has no affect use the 8pin

[Transeau]

Re: GA-P55-UD5 no POST.... x2

Okay, I pulled the 8-pin and plugged in the 4-pin - same thing. MD1/2, GD1/2 lit solid, and DIMM_LED solid.

I tried this on both setups (the one in the case and the one on the bench).

Is it possible that I have two of everything that is bad??

[Transeau]

Re: GA-P55-UD5 no POST.... x2

There is no jumper on the board - no jumpers at all...
I've cleared the CMOS 3 different ways.

DIMMs are in the white slots (DIMM_0 and DIMM_1)

I have 3 different power supplies, two boards, two CPU's and 8 DIMMs.

[wazza300]

Re: GA-P55-UD5 no POST.... x2

There is no jumper on the board - no jumpers at all...
I've cleared the CMOS 3 different ways.

DIMMs are in the white slots (DIMM_0 and DIMM_1)

I have 3 different power supplies, two boards, two CPU's and 8 DIMMs.

read my last msg as ive added to it,and im sure theres like two pins sticking up "jumper" near to the battery

[Transeau]

Re: GA-P55-UD5 no POST.... x2

I've tried a ton of memory combos.

Any dual channel combos cause it to power cycle. Single channel causes it to stay powered on, but no POST and the DIMM_LED lit.

[Transeau]

Re: GA-P55-UD5 no POST.... x2

im sure theres like two pins sticking up "jumper" near to the battery

There is a CLR_CMOS button, and a CLR_CMOS jumper marked, but no actual jumper on it. Just the markings on the board.

That was one of the first things I looked for. I remember way back many manufactures would ship boards with the CLR jumper installed and you had to remove it before it powering on.

[Transeau]

Re: GA-P55-UD5 no POST.... x2

yes but did you try installing the ram with the board powered on and just the psu connected ie all the psu cables connected up,as you have to do this for corsair ram or it will power cycle...im just thinking try it for the ram youve got maybe it will work maybe not

So, to be clear...

You want me to install the memory with the system POWERED ON. Exact opposite of everything we ever learned about hardware?

[wazza300]

Re: GA-P55-UD5 no POST.... x2

also have you tried with just one hard drive,one gpu and 4gb of ram??

[Transeau]

Re: GA-P55-UD5 no POST.... x2

I have a single drive attached on the "built" setup, with a single GTX 275.
I have no HDD on the "benched" setup, with a cheap ATI 38xx.

[wazza300]

Re: GA-P55-UD5 no POST.... x2

i advised you wrong before
taken from a post a few pages back on ex58 extreme power up failure
"the Corsair instructions are inside the folded purple paper included in plastic package.
It states: "Turn off computer, monitor and all acessories. Leave the computer power cord plugged in ... insert the module into the socket ... press down frimly on the top ... the white retention clips should snap into place".
I just unplug everything out the board but the PSU, insert the RAM and I'm fine."

[Transeau]

Re: GA-P55-UD5 no POST.... x2

Problem solved.

It was the memory. I ordered two more sets of memory (different kinds) and finally got one that would post nicely.

It appears that the Socket 1156 processors are VERY picky about the memory they use.

[blownapart]

Re: GA-P55-UD5 no POST.... x2

Yup, I usually go G-Skill or Corsair. Corsair XMS @ 1600MHz on my GA-P55-UD4P runs like a champ.

[wazza300]

Re: GA-P55-UD5 no POST.... x2

im glad you fixed it,maybe with future bios's youll be able to use your old ram