Genuine 300W Bestec ATX0300D5WC Power Supply for ATX-300-12Z P/N 585008-001

After five years the old power supply's fan stopped, there was a bad smell and the computer power would not turn on. I ordered this supply, the model number is exactly the same as the old supply (including "Rev. B" as seen in the photo). In half an hour I took out the old supply and put in the new one. Worked perfectly and that is it.

This is an exact replacement for the HP computer I was repairing and it fit and worked flawlessly. I've had no complaints from the customer so I am assuming it continues to work.

Perfect replacement for the same model in my HP Pavilion desktop. The original OEM had developed a loud whine and was starting to very occasionally cut out. This was a quick ship and easy replace, no problem since.

The device lasted five weeks before dying. This fine company will not refund me for the piece of worthless crap I was sold. Will not recommend them to anyone. Nor will I ever buy from them again. May they quickly go out of business and save others from losing money to these smucks.

This is NOT MY review OR rating, PC also had other hardware problems... SO I shall return soon to complete a true review... Just letting you know i can not rate til the repairs are complete...OK Now that the PC re-build is complete... I can say that this Power Supply is running fine so far and the cooling fan is keeping the air flow inside the case moving quite well even if it a little bit louder than the usual power which i do not mind so much knowing that the extra cooling may help to NOT allow the problem with the original power supply that came with the machine... That ended up being a slight melt down of the mother board & internal graphics.. Thank You Amazon & the service rep i spoke with to get this item shipped at the earliest possible time...

Replaced my old one for my HP Pavilion and working perfectly. Very easy to install and now we have our computer back online again.

Works, is very quiet, I had to look to confirm the fan was running.replaced the supply from a HP Pavilion 5 or 6 yrs old. It's the exact part as the original. The computer was almost never turned off and the fan bearing finally went out. Took about 10 to 15 mins to swap out and back in business. If it last like the original a new computer will come first.Paid a couple bucks more for the Prime / Amazon ordered Sunday, received on Tuesday.

The cooling fan was vibrating and I replaced it with new one. Other conditions is Ok