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Computer keeps powering off and on then stays on

Forum Homebuilt Systems : New System Build - Computer keeps powering off and on then stays on

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Gennobi   09-09-2008 at 06:34:29 PM

I'm fixing my best friends computer, and he just spent $1300.00 at tiger direct building this thing. The problem is the thing keeps powering off and on, then the system stays on (for an unknown amount of time). It does this about 9 or 10 times. I don't know why it does this either. I've never really seen a problem like this before. I really don't know what can be causing this.

Ok, here's the specs for the computer.

Motherboard: Asus M3N HT Deluxe
Processor: AMD Phenom X4 9850 black edition
Memory: (2 gig) Corsair xms2 dd2 1066 mhz There's 2 sticks of this.
Graphics Card: (2) Nvidea PNY GeForce 9600GT (SLI configured)
Hard Drive: SeaGate Barracuda 250 GB HDD

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auscanzukus   09-10-2008 at 02:20:44 PM
- 0 +

What's the psu make & model?

Unplug power cord, clear cmos for 10 mins, try each stick of ram in each slot.

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Gennobi   09-10-2008 at 05:59:27 PM
- 0 +

Oh, the PSU is a 650 W Ultra

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auscanzukus   09-11-2008 at 01:49:34 PM
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Did you try my suggestion?

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Bronze Home Brew badge Proximon   09-11-2008 at 02:09:45 PM
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Not all Ultras are created equal. Is it an X3?

Yes, try to clear the cmos.

If that doesn't work, try flashing the BIOS. It could just be trying to boot at default settings and failing... BIOS might not recognize that CPU without an update.

Reply to Proximon
Gennobi   09-13-2008 at 04:57:24 AM
- 0 +

auscanzkus, clearing the cmos and updating the bios did it.

Also, are two 9600GT cards for SLI useful, because I'm getting a lot of feedback telling me that I'm better off with one.

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ohiou_grad_06   09-13-2008 at 07:56:27 AM
- 0 +

I'm kinda wondering if the Ultra PSU is the problem. Now don't get me wrong, I've had ultra PSU's before and they were actually a good unit for me. But I'm not so sure that Ultra actually has enough juice to push both those cards. Also, do try the bios update. But one quick test for the psu theory, remove one card and see if it still acts that way.

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auscanzukus   09-13-2008 at 02:37:58 PM
- 0 +

You need to google for 9600GT SLI benchmarks for the GAMES that you play to determine if SLI would be worth the money. i.e.

http://www.firingsquad.com/hardwar [...] /page9.asp

About 10 fps or 50% jump in that game. I think your priority right now is to stabilize the pc. Get this to a disk & boot it up for 8 passes:

http://www.memtest.org/#downiso

If it errors out, bump ddr2 voltage up a notch and retest.

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