Is there a maximum PSU rating for the ASUS PT

December 19, 2010 at 11:29:05
Specs: Windows 7
I have a HP Media Center m1080n PC (model # PC099A). I have the ASUS PTGD1-LA (Puffer-UL8E) Motherboard. I've upgraded the graphics card to the EVGA e-GeForce 8800 GTS ssc edition. It's been running fine since Jan. 04,, 2008. Then it stopped working. Called Nvidia support. They said I didn't have a big enough power supply. Therefore I went and upgraded from the stock PSU (HiPro, Model: HP-D3057F3R, 300W) to a Diablotek EL series 500W model # PSEL500. Now nothing happens when I try to turn it on. I'm possitive that I've plugged it in correctly. I've put the old stock graphics card back in and I'm possitive it works. But with the new PSU in nothing happens yet again.

Two questions:
1) Should the new PSU still work with the old Graphics card in?

2) Is the PSU to large for the Motherboard?

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December 19, 2010 at 11:37:40
Something is not hooked up properly or the new psu is no good. If it doesn't turn on at all, something isn't hooked up properly. It should at least post if it's working. The size of the psu doesn't matter. Try disconnecting everything except what is essential and see if it will post.

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December 19, 2010 at 12:23:32
AFAIK, there is no max wattage. The system will only draw as much power as it needs. If you have a 1000W PSU & your system only requires 275W, that's all it will produce. Put that same load on a 300W PSU & it's close to being overloaded

The HiPro 300W may be a little underpowered for your system, but it's a decent quality PSU. There's a big difference between inexpensive & cheap. The Diablotek is a cheap piece of junk:

Try the HiPro again, if the system boots, package up the Diablotek, return it & buy something good. You should expect to pay about $50 for a decent 500W PSU but there are plenty of rebate deals out there. I'm not a big fan of the multi +12v rail design, but here's a decent 600W unit for $38 after rebate:

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December 19, 2010 at 19:45:07
Thanks all. I did return the Diablotek and completely agree that it is junk. It should say on the box, "May not work if removed from box." Therefore I went back to Microcenter, returned, and got a 50 dollar Inland. On the funny side. I had quite a few ID-10-T errors, for example I thought for sure the graphics card wasn't working then realized that you have to plug in the monitor cable for it to work. Brilliant!

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