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Power Supply Problem?

T

Tahlbee

Junior Member
I just built a system for a friend. It is an AMD X2 3800 with an EVGA 7600GT on an MSI 7125 board. The PSU is an Antec 300W with a 20pin lead the MB has a 24pin connector. I read that I can just plug that in to the board. I did and the first time I started it up it shut off after 3 seconds. I re-plugged and it worked fine all the way thru the build process. After two days of use, it is now doing the 3 seconds routine.

Is this a sign of an under powered PSU or maybe something else? Do I need a 20/24 pin adapter? Any help would be appreciated.
 
Probably is telling you the power isn't sufficient. Can you borrow a higher watt PSU from someplace to check it out? I don't think the 20/24 pin difference is your problem, as long a you have the 20 pins aligned with the correct 20 pins on the 24 pin connector. You normally align the PSU connector by the little clamp on the side of the mobo connector. If it holds the PSU connector, you should be OK there. I think a better, newer PSU may be the answer.

Also, do you have the other PSU 4 pin power CPU connector plugged into the mobo CPU 4 pin power connector? And a power lead plugged into the 7600?

Noel
 
I do have the pins aligned correctly. I do also have the 4 pin connector attached. It doesn't appear that this video card has any external power requirements. I don't have an available PSU that I can try. I will pick one up today and try it out. It just had me stumped because I can get it to work sometimes.

Thanks for the suggestions!
 
Originally posted by: Tahlbee
I do have the pins aligned correctly. I do also have the 4 pin connector attached. It doesn't appear that this video card has any external power requirements. I don't have an available PSU that I can try. I will pick one up today and try it out. It just had me stumped because I can get it to work sometimes.

Thanks for the suggestions!
Click to expand...

Purely my curiosity, please let us know how this works out.
 
I am guessing that it was just an under powered PSU. I purchased a 480 Watt PSU from a local store. I hooked it up and it worked just fine. Now we'll have to see how long that unit lasts. I have not had the best luck with "bargain" PSUs. Thanks again for the assist!
 
Originally posted by: Tahlbee
I am guessing that it was just an under powered PSU. I purchased a 480 Watt PSU from a local store. I hooked it up and it worked just fine. Now we'll have to see how long that unit lasts. I have not had the best luck with "bargain" PSUs. Thanks again for the assist!
Click to expand...

I thought 300watts was enough to power most PSU`s.........

Who would have guessed...lol

 
Originally posted by: JEDIYoda
I thought 300watts was enough to power most
Click to expand...

A quality 300W unit with most of the power on +12v should be enough for that system in the OP, but an old 300W Antec with only a 20 pin sounds like an old Smart Power unit that isn't as +12v heavy as more modern PSUs.
 
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