Still having problems after replacing cpu, motherboard and ram

[Mr_Sam]

Hi,
I have just installed a new gigabyte GA-G31M-ES2L motherboard with 2gig of Kingston valueram 667mhz ddr2 and a Intel Pentium 4 presscott 3.0ghz cpu. I connected everything as it should be and decided to use the onboard graphics of the motherboard to start with. When i tried to boot it up but the fans spin and the drives spin up for about 8 seconds before the power cuts off. I thought this is the power supply as it may be underpowered at 350 watts but the only other PSU i had to test with is only 300 watts so i couldnt rule out the PSU. Could anybody tell me what could be wrong with this pc as i need to get it fixed asap.
Thanks in advance,
Sam

 

[Tmagic650]

You need to make sure that you connect the 4 or 8 pin CPU 12 volt connector to the motherboard socket near the CPU

 

[Tedster]

to calculate psu requirements: http://extreme.outervision.com/psucalculator.jsp add 30% to the results for cushion.

 

[Mr_Sam]

Hi,
The issue has been resolved now. It turned out to be a faulty power switch.
Thanks for the replies,
Sam