stability problems with xeon

[Asta]

hey guys i recently got a xeon x5650 and a gigabyte mobo for a small project in my free time. i've build everything and at first it seems to work fine bit when i start prime 95 the pc gets a black screen after 5 minutes. everything is at stock and i've got the latest BIOS version. i wanted to build and use this rig on my second workbench but i dont know where the problem is. the temps seem to be ok at 53°C on full load. so i really dont know where the issue is.. could anyone help me or had same problems? i also cannot restart the system. when i restart the monitor shows black and it wount reboot just stay like this rill i reset it

 

[Johan45]

So if you clear the CMOS it will start? Is that what you're saying?
Can you list off all your parts with some description

 

[Asta]

no, i dont need to clear the CMOS i have to shut the power off and on again. then it boots again.
parts that are in use:
CPU: Intel Xeon X5650
Mobo: Gigabyte GA-EX58-UD4P
RAM: 3x2GB Corsair 2048MB and 1600MHz
GPU: GTX 770
Cooler: Arctic Freezer13
PSU: 750W
Latest BIOS Version
Open Testbench

- - - Updated - - -

first i thought it might be the northbridge getting to hot bust everest shows it at 55°C..

 

[Johan45]

A couple things I see . First that CPU isn't "technically" supported by the motherboard at least I don't see it on the list https://www.gigabyte.com/Motherboard/GA-EX58-UD4P-rev-10#support-cpu
You also may want to drop the memory speed to 1333 which is official max supported by the CPU. At least till you get this figured out

 

[Asta]

i've dropped the memory speed to 1333 but still getting the same issues.
i also have searched for other lga 1366 boards. non of those seem to support the x5650 acording to the producers CPU list.
on http://www.pc-specs.com/cpu/Intel/Xeon/Xeon_Processor_X5650_/2111/Compatible_Motherboards on the other hand they are telling that all these motherboards support x5650. so im kind of confused to be honest.

 

[Johan45]

How old is that power supply and what's the brand name?

 

[Asta]

the PSU is pretty new actually but it seems to be a no name PSU called CP750W Plus

 

[ATMINSIDE]

the PSU is pretty new actually but it seems to be a no name PSU called CP750W Plus

Ditch that and get something that's a quality PSU.

 

[Johan45]

It's a Combat Power made by Intertech. Hard to find a reveiw for it but I did see it carries only 25A on the two 12V rails. This makes me wonder. Do you have another PSU you could test with?

 

[maxfly]

did you set the cpu and memory voltage manually through the bios? if not i would start there.

 

[Asta]

unfortunately i dont have a PSU that would be powerfull enough, just got an other 450w PSU. seems like i have to order a new one to test it.

yes i also have set the cpu and memory voltage manually but still with the same result.

 

[Johan45]

What are the specs on the 450. If it's a decent PSU it shouldn't have a problem running that set up

 

[Asta]

so, the 450w PSU also does not seem to work. but i'll get a Corsair CP-9020099-EU to test with on friday. if that also does not work can i assume that my mobo is bad?

 

[Johan45]

I wouldn't blame the board just yet

 

[trents]

Are you using mixed RAM modules or are they the same make and model? Try bumping up the RAM voltage by .05 from stock.

 

[Asta]

the RAM modules are all the same. bumping up the RAM voltage also didnt work unfortunately.

 

[DeadSmiley]

I have GA-X58-UD3R and GA-X58-UD7. They both run the Xeons beautifully. Is your motherboard BIOS at the latest revision?