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Problem with new build. Please help!

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April 20, 2010 10:25:09 PM

Hello,Put my system together.

Item: AMD Phenom II X4 955 Black Edition 3.2 GHz Socket AM3 8MB Cache Retail Boxed Processor - Qty: 1
Item: Coolermaster Elite 341 MATX Case - Qty: 1
Item: Gigabyte GA-MA785GMT-UD2H 785G Socket AM3 DVI VGA HDMI Out 8 Channel Audio MATX Motherboard - Qty: 1
Item: Kingston 4GB (2x2GB) DDR3 1600MHz/PC3-12800 HyperX Memory Kit CL9(9-9-9-27) - Qty: 1
Item: Arctic Cooling Freezer 7 Pro rev 2 Socket 775, 1156, 1366, AM2, AM3 Heatpipe CPU Cooler - Qty: 1



After running for 4 minutes the screen goes blank and the power button doesn't respond.
i) it went blank when I hadn't realised I left the windows xp dvd in the drive (started setup then went black)
ii) it went blank after booting up into windows (as far as the logon screen) then went blank

Guess my PSU isn't sufficient. It has a 4xpin ATX 12V power connector and not 8. Hope I haven't fooked the board up.
Is it possible to use two PSUs for the time being or do you think the fact I'm having to use a 4pin connector is the issue here?

Very strange! Any suggestions would be welcomed

Edit: forgot to mention that it's a fairly cheap 500W PSU (but did absolutely fine on the last build).

More about : problem build

a c 435 V Motherboard
April 20, 2010 11:36:45 PM

With high end quad cores you probably need an 8 pin ps connector. Corsair is the best; I use antec and ocz.
April 21, 2010 12:21:09 AM

Thanks o1die. Is 8 pin the same as 4+4? Or EPS12V only? Thanks

Btw, do you reckon a 400w PSU should suffice for the above spec?
Related resources
a c 177 V Motherboard
April 21, 2010 12:53:57 AM

Antec Power Supply Calculator...

The usual suspects:

Have you gone directly into the BIOS and watched temps to check on your HSF install?

Have you done the (required) "Load Optimized Defaults"?

Have you tested your memory setup?

Thats a 125W TDP CPU - likely wants a 2x4; figure with four supply wires bringing roughly 80% through the local VRDs, you're looking for a hundred watts on the 2x4 alone - over two amps per wire...
a c 435 V Motherboard
April 21, 2010 10:44:28 AM

I recommend a ps with at least 22 amps on each 12v rail; corsair has a single rail with higher amp ratings on some models. Newegg had a rosewill 600w with similar specs for $40 shipped in yesterdays email promos. Rosewill isn't a great brand, but I realize some folks don't have $100 or more for a premium ps.
a c 156 V Motherboard
April 21, 2010 12:05:48 PM

If you are on a tight budget, maybe OCZ, but not Rosewill.
a c 177 V Motherboard
April 21, 2010 1:24:07 PM

Those 'ShellShockers' and 'DailyDeals' are worth watching at NE - I got a $175 Zalman for $114...
a c 435 V Motherboard
April 21, 2010 2:37:00 PM

Newegg has an antec 550w cable select for $39.99 shipped today, before a $10 rebate. It has 22 amps on each 12v rail.
April 22, 2010 12:41:34 PM

Thanks everyone for all the suggestions. The problem indeed did seem to be the lack of an 8 pin connector. I picked up a 500w OCZ ModXStream-Pro in the end. Bloody good PSU and I love the modular design on it with the netting to tidy the cables up. Strangely though, the PC still wouldn't boot up until I connected the dvd drive (keyboard wouldn't light up or work until that drive was connected too).

Had it working now for 24 hours and it seems fine. Running Xp 32 bit - I don't think i'll upgrade to Windows 7 while I'm relying on the on board graphics as it seems to eat up 700mb of system memory (sometimes windows reports 2.75gb)

This has now been solved. Thanks again everyone :) 
April 22, 2010 12:52:42 PM

Couldn't edit post sorry. The CPU seems to run a little hot though. Whilst pretty much only using NewsReactor to download stuff off newsgroups it shows CPU temp at 43C
a c 177 V Motherboard
April 22, 2010 1:10:02 PM

Quote:
it seems to eat up 700mb of system memory (sometimes windows reports 2.75gb)

You can adjust this -

On the "Advanced BIOS Features" page of the BIOS (p 47 of the manual...):

"UMA Frame Buffer Size" can be set to 128, 256, or 512 Meg - in "Auto" (default), it 'uses what it pleases'...
April 22, 2010 1:14:44 PM

bilbat said:
Quote:
it seems to eat up 700mb of system memory (sometimes windows reports 2.75gb)

You can adjust this -

On the "Advanced BIOS Features" page of the BIOS (p 47 of the manual...):

"UMA Frame Buffer Size" can be set to 128, 256, or 512 Meg - in "Auto" (default), it 'uses what it pleases'...


Cheers billbat. +1 rep if I could :) 
a c 177 V Motherboard
April 23, 2010 3:51:20 PM

Always [:graywolf:9]
!