Computer randomly turning off and back on

[WTF Joel]

This has been happening  for a little while now, and I've mostly just passed it up as nothing since it didn't happen much. In recent, it has been happening a lot more frequently.

Sometimes it will be when I'm gaming, other times when I'm just browsing the net. The whole computer will shut down entirely, like no lights on the case, nothing. It will stay that way for about a second or two, then it powers itself back on, I choose to boot it up normally, and everything seems fine again. when this happens, everything else in the room stays on from what I can see.

I have updated and scanned with several virus programs and from what I can tell, the machine is clean. My temps are pretty good from what I can see, I've just recently cleaned out the tower. Though I do notice that Core0 and Core1 have been heating up more than what they used to. Normally they'd stay down in the 30's, but now whenever I'm doing something, they seem to go up into the 40's, sometimes even the 50's on par with the graphics card.

Is it possible that my psu isn't strong enough anymore? The only thing I really installed recently was a third hard drive. I really don't know.

Any ideas?

[CaffeinePowered]

Post your full specs, and especially for your PSU, its brand

[WTF Joel]

OS: Windows 7 Home Premium 64bit
Motherboard: Asus PQ5 Deluxe
CPU: Intel Core 2 Quad Q9550
RAM: GSkill DDR2 8GB
GPU: Nvidia GeForce GTX 280 1GB
PSU: Sigma Shark 635 watt
Hard Drives: Segate 500GB (x2) and 1TB (2TB total)
Monitors: Dell 22" widescreens (x2) @ 1920x1080
Speakers: Logitech 5.1 Surround
G15 keyboard, G5 mouse, G35 headset.

That enough? o-o

[Vandamguy]

from your description and monitoring, the easiest thing to point at would be PSU.
How frequently does it happen? several times a day?

Process of elimination can start with purcheeseing a new PSU and if it's still blanking out , then return it.. (no shame in that)

If that doesn't work then my suspicions turn to the motherboard.

third is a long shot but your CPU might not be reporting the correct temperatures.

[Versus]

newegg's PSU calc says you're already like 55W over what your PSU should be capable of handling. plus i don't think i've ever heard of sigma shark before now. and if reviews on newegg are any indication, your PSU is far from the most reliable.

"Cons: It failed after 16 months. 12 volt rail could only muster 10 volts and 5 volt positive produced only 3 volts. Was causing all kinds of random crash's."

"The power supply is very heavy, but not due to the internal components but instead due to the casing where they added random thick parts to make the power supply feel heavy and thus justifying the price."

"Cons: Has power issues, failed within two years."

"Cons: Kinda loud. Died after 6 months, and I am not drawing heavy loads against it or leaving it on 24/7"

[WTF Joel]

I've never had it happen more than once in any day. I'd say maybe 2 - 4 times a week now at max.

I actually have a new motherboard and case sitting next to me, I'm just waiting on a friend to come through with his end of a deal that should secure me some new graphics cards. I can't find my thermal compound, so that's the only thing really keeping me from switching everything over to the new board and case.

If it is the psu, then I'll have to try and pull some strings to get a new one... I was thinking of upgrading to a 1000w in the future because I'm looking into doing sli/crossfire at some point soon..

EDIT: This is the psu I have currently http://www.newegg.com/Product/Product.as...6817226002

[Versus]

yeah, vid cards that require more power is the last thing your PSU needs.

[CaffeinePowered]

I have old silverstone 750w I could sell you cheap, worked up until I put a GTX280 in my box, then it couldnt power it and the like 6 HDDs I had hooked up to it

[WTF Joel]

Thanks, but no thanks. According to newegg, the new cards I'll be getting will need a bit more than that. If I'm going to drop money, I might as well get it done the first time.

[CaffeinePowered]

Thanks, but no thanks. According to newegg, the new cards I'll be getting will need a bit more than that. If I'm going to drop money, I might as well get it done the first time.

No problem, my rec would be to go for overkill with a 1000w silverstone then, <3 silverstone

[WTF Joel]

I'm looking at one from Antec. It fits the new case I got, and the only negative feedback is from people too stupid to read the case requirements

[Versus]

uh you should link it then

[CaffeinePowered]

uh you should link it then

Antec is usually good, just make sure you get one of their higher end TruPower models

[WTF Joel]

I was thinking this one http://www.newegg.ca/Product/Product.asp...6817371036

[Vandamguy]

I was thinking this one http://www.newegg.ca/Product/Product.asp...6817371036

Power Supply Exclusively for - Twelve Hundred(1200)/P183/P193/DF-85

izzat what ou have?

http://www.newegg.ca/Product/Product.asp...6817256051
is what caff has the bwner for.

[WTF Joel]

Yes that's the new case I have sitting around waiting for parts to put in it.

[[fr31ns]Karrde]

For the love of God, Joel, get modular power.  *glances at the coil of cables in the bottom of his case*  You'll thank yourself later

[WTF Joel]

Karrde link=topic=5423.msg195145#msg195145 date=1296846624]
For the love of God, Joel, get modular power.  *glances at the coil of cables in the bottom of his case*  You'll thank yourself later

The new psu is modular. And I will be attempting half decent cable management this time around since the case has a nice window in it. Has to look pretty n stuff.

[Kirby]

[quote author=[fr31ns]Karrde link=topic=5423.msg195145#msg195145 date=1296846624]
For the love of God, Joel, get modular power.  *glances at the coil of cables in the bottom of his case*  You'll thank yourself later

The new psu is modular. And I will be attempting half decent cable management this time around since the case has a nice window in it. Has to look pretty n stuff.
[/quote]


Take a good look @ the PSU pics and make sure you've got long cables, so many PSU's are woefully inadequate with the length.

[WTF Joel]

The psu is meant specifically for my case, I'm not too worried about it.