Power issue

Falcon

Falcon

Falcon

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Joined
21 Apr 2008
Posts
42
Just over a week ago I decided it was time for me to bring my pc up to date a bit. I bought a second hand Samsung EVO 840 SSD, 8gb (2x4gb) mushkin ram, am EVGA NEX750B power supply and a new R9 270x graphics card.

Last weekend when I went to install all the above equipment I had issues getting the my pc to power up, the case fans, graphics card and cpu fan would all power up for about a second then power down for a couple of seconds and then repeat over and over again. Thinking it might be a psu issue I went a bout a Corsair HX650 and the same problem occurs. However if I use my old Corsair VX450 I can get my pc to work boot etc. I've done the paperclip test on both the psu's and they seem to work fine.

Any suggestions what might be causing this power problem? Ideally I'd like to use one of the newer psu's.

Thanks
 
That does seem weird that an older and weaker PSU works better than a newer unit.

I can only imagine the motherboard is somehow sensitive to which PSU it likes.

What board is it?
 
Out of the 2 newer psu's which one do you think I should keep? The corsair is new but the EVGA is slightly more powewrful.
 
Can you find the exact model numbers? they will be on the label somewhere.

Example,

NEX 750B is FSP
750B1 is made by FSP
750B2 is Superflower

Sme for the Corsair please as there are a few variants.
 
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