Random reboots within first 30 minutes, any ideas?

[Yossarian]

I just put this system together Friday and had it running smoothly for a day and a half. Sunday it decided to reboot a couple times on its own after first power up, then became stable after a while. This morning it rebooted once after being on for about 15 minutes then was ok. Do you think this is a power supply problem? I had no problems with the PS prior to my upgrade, was running Athlon 1200 w/GeForce2 GTS. Are there any components that work better after they've warmed up?

CPU temp at startup is 21C measured by mobo sensor & motherboard monitor, gets to 39-40C after about 15 minutes, 44C under full load (Prime95 for an hour).

System specs--

Epox EP-8KHA+
Athlon 1800+ w/stock HSF
2x256 Crucial PC2100 (set to CAS 2, 4-way interleave on)
Gainward GeForce3 Ti200, Det 23.11 (oc'ed to 195/495)
IBM 45GB 75GXP
Asus 50x CD-ROM
Liteon 24/12/40 CD-RW
Soundblaster Live 5.1
Generic NIC
Antec 300W PS in SX830 case
Win2k Pro, fully updated

I tried it yesterday w/memory back at CAS2.5, interleave off, video at default speeds and still got a reboot.

Thanks in advance.

 

[KenAF]

What drivers are you using on your Geforce3?

 

[Yossarian]

Ah good question, I'm using 23.11. That's a good idea though I'll try something like the 21.83. Original post updated.

 

[TheGreenGoblin]

Have you checked your cpu voltage settings ? Sometimes a mobo's bios displays vcore voltage incorrectly . I'd use Sandra or MBM5 just to make sure your cpu isnt underpowered.

Have you checked AMD's approved ps list ? I know there's one Antec 300w PS that isnt even approved for anything above a 900 T-Bird on AMD's site.

 

[AndyHui]

Please read the FAQ: Why does my computer reboot itself?

 

[TheGreenGoblin]

The Antec PP303x is certified by AMD for Tbird's 900 mhz or less . Is the p.s. that Antec bundles w/ the 830 case ?

If it is I'm guessing the ps was good enough for your 1.2 , but is having a rough time with the 1.53.

 

[Yossarian]

Thanks guys, I have some better ideas now from your replies. Damn I read too many of the FAQs Friday, I forgot about the reboot one.

 

[Yossarian]

Ok thanks for the link Andy, that did the trick (or at least let me see what was wrong). The evil 23.11 driver was crashing, problem solved by reverting to 21.83. I will be ordering a 400W Antec PS in the next couple days though just to be on the safe side. What a frickin great resource these forums are