Problem solved. It was the power supply after all. The two power
supplies that did not work properly had single 12 volt rails (20 pin).
The power supply that I have now is an Antec basic 500 watt with two
12 volt rails (20 + 4 pin). I would highly recommend this power supply
for anyone with similar system specs to mine.
On Mon, 07 Apr 2008 02:03:35 GMT, number3 <> wrote:
>To make a long story short. After swapping my 89 watt opteron 148
>(single core 2200mhz) for a 110 watt opteron 180 (duel core 2400mhz)
>my computer no longer responds to the start button on my case. The
>system started normally after the BIOS updates needed for dual core
>support on my socket 939 Biostar Tforce 4U (NVIDIA nForce4 Ultra
>chipset). The only change I made was the new CPU, and when I went to
>start my computer the power button did not work. After 5 minutes of
>pushing the power & reset buttons I was about to give up when it
>suddenly came on. Runs fine and stable once started and even
>overclocks stable to at least 2800mhz at stock voltage. Once started I
>can restart and go into the BIOS and change the settings to restart on
>power failure. Now I start my computer by turning the power supply on
>& off until my machine fires up.
>I just replaced my old 500 watt power supply with a new 500 watt
>supply today thinking that might be it.
>Any suggestions would be welcome.
>
>System specs
>socket 939 Biostar Tforce 4U (NVIDIA nForce4 Ultra chipset) mainboard.
>Opteron 180
>1 gig Mushkin PC4400 ram (2 x 512)
>2 DVD burners
>2 HDD's
>floppy
>NVIDIA 6800gs PCIe video card
>High def TV card
>
>My old opteron had been running fine at 2750mhz (10 x 275) for over
>two years in this system.
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