PLEASE HELP: Trouble with Prime95 and ABIT NF7-S board

[xpkwali]

I am kinda confused. I seem to have all the right things at the moment but cant get to run stable for s***. I have a ABIT NF7-S board and a XP mobile 2600 barton core processor. But everytime I try to run Prime95 the system just automatically shuts down. I ran memtest86 and 0 errors. I ran Doom3 nothing but freaking Prime95 keeps making the comp shut down without any notice. I monitored the rails and they are running at: 3.3 is running at 3.28 the 5 one at 5.08 and the +12 one is at 11.73. Th only issue I am not sure is if the 4 pin molex connector on the board. I have a connection for it but my PSU which is an Antex PP-403X a 400watt PSU has no connection for it. I am wondering if that is an issue. Please please help me out cause this is turning into a nightmare which I thought would be a fairly simple task. Please need an opinion as to what I should do to make the system stable. All posts informative would be greatly appreciated.

 

[user1234]

you answered your own question: get a new PSU, you need the 12V ATX line to feed the CPU in high stress apps like prime95.\

 

[Fern]

1) If it ran Doom 3 fine but not P95, I'm not sure I would worry too much. It's more fun "playing" D3 than P95 anyway.

2) I had an NF7-S with a 400 watt Turbolink PSU, which did NOT have the other 4 pin 12v ATX connector and it ran fine. But that was with an AMD 2000+ cpu which was not OC'd.

3) Install Motherboard Monitor 5. Select "sys log" in the lower left of the MBM5 main screen. Elect to have it record the readings (voltage & temps) in a text.doc. Select recording intervals of one second and go run P95 and see if you cpu voltage fluctuates. The sys log will still be there after the shutdown, so you can see if pwoer flucs are to blame

4) what cpu settings do you have (FSB, multi and vcore)?

 

[Concillian]

For AthlonXP boards, they do not require the 12v connector, they will run the CPU off the 5v rail in this case, so make sure your 5v rail is capable of well over 100W if this is the case. If you want a 4pin 12v connectors adapters are available:

http://www.abccables.com/cb-psci-2v.html

That was just the first one I pulled up from Google, I have never shopped at that place, just an example.

Power supply issues should go away if you run at a speed/voltage that doesn't pull as much current. What voltage, FSB speed and multiplier are you using?

 

[user1234]

1) Doom3 is not that great to stress the CPU, Call of Duty is far more likely to crash your prime-95 failing system.
2) You can get an adapter for your old power supply, which transforms a regular molex connectors into a ATX 12v connector (it costs less $2).
I think it's still better to use the 12v ATX connector for newer Athlon CPUs which run at faster clock speeds.