Computer Randomly Restarts After Mod.

[dave2000]

Hey guys, see if you can nail this one.

I recently bought a new PC case, with a PSU. I took all the pieces out of my old computer and put them in the new case. (Admittidly this is the first time I tried this.)
After hours of work and trial I managed to get it all to turn on, but I'm getting 'random' restarts, here are some observations about the restarts:

- Happens usually after I enter my password to login
- Sometimes logs in and will work for anywhere between 5mins and 3 hours
- Won't restart until I login, can sit at login screen for hours.

I have Windows XP, and nothing in the event log helps me. I have turned automatic restart to off. Also the PSU supplied is more powerful than my previous one I think. Overheating should not be an issue I am pretty sure and my RAM is being detected. I also did a disk check and it showed nothing. I'm out of ideas


All help appreciated, cheers.


P.S. Would the order of the Power SW, Reset SW and HDD LED wires cause this, I do not have the manual for my MOBO so cannot be certain if they're in the right places.

 

[Rik]

I suggest you try your old psu even if just to eliminate the possibility of the new one being faulty.

Let me know how you get on.

 

[Fragrant Coit]

Doublecheck there's no Spacers under the Motherboard where they shouldn't be - ie, not under Screw Holes.

 

[dave2000]

Thanks guys, I think it was the PSU I put the old one back in and its been going strong for a few hours now.
Only problem now though, I wanted to upgrade my 7300GS graphics card to a 7950GT Extreme, which was one of the reasons I bought a new case with the PSU included. Do you think I'll have to buy a new PSU now? Or will the oold one still do you think? (Theyre both PCI-E)

Thanks again
Grateful

 

[Daveskater]

Hello, dave2000, and welcome to Techspot :wave:

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With regards to your problem, it depends on how powerful your old PSU is. You should be able to get a replacement on the PSU that came with the case, then you could use that one.

 

[link590o]

i highly suggest a new psu. the old one may be better quality, but it certainly won't be able to power everything plus a power hungry graphics chip unless your old one is a 500watt from a top notch brand. in which case, your best bet i think is to simply upgrade to a top notch one that will effectively power your PC, and still leave some head room. a friend of mine posted an unofficial guide to power supplies. you may want to check it out for price range, performance, and quality.

http://forums.firingsquad.com/firingsquad/board/message?board.id=hardware&thread.id=111309

look for a tier 2 power supply. they are decently priced, offer LOTS of power and performance/quality, and will definitely power a system with your specifications.