P55 USB3 keeps beeping.

[Dark Mantis]

I have just picked out the Corsair HX750 as a similar PSU to what you want. These are the specs:

Corsair HX750W Features:
•Guaranteed to sustain its full rated wattage at an ambient temperature of 50°C
•Up to 90% energy-efficiency under real-world load conditions*
•Single +12V rail design providing up to 62A
•Multi-GPU ready
•105°C solid-state capacitors
•Active Power Factor Correction (PFC) with PF value of 0.99
•Supports ATX12V 2.3 and EPS12V 2.91 standards. Backwards compatible with ATX12V 2.01
•Auto switching circuitry for universal AC input from 90-264V
•Over Current/Voltage/Power Protection, Under Voltage Protection and Short Circuit Protection provide complete component safety
•Dimensions: 150mm(W) x 86mm(H) x 180mm(L)
•MTBF: 100,000 hours
•Safety Approvals: UL, CUL, CE, CB, FCC Class B, TÜV, CCC, C-tick

http://www.corsair.com/products/hx750/default.aspx

You will notice that the line coloured blue is to do with the 12v output and it is a single rail carrying all 62 Amps. If it was multi rail it would have maybe four of these but at only 15 Amps each. That would be fine as long as you didn't have anything in your system needing more that 15 Amps.

[sp00ks]

Oh god.
I think the problem was the ram not being properly inserted. I noticed I had to "click" the ram into another computer of mine, and tried it on the new one, and now it doesn't beep anymore.
Even if it works, I'll probably get a new PSU anyways, if the cheap one could damage my system.

[Dark Mantis]

So does your system work properly now then?
As you say it would be prudent to change your PSU anyway.

[sp00ks]

So does your system work properly now then?
As you say it would be prudent to change your PSU anyway.

Looks good so far. Installing Win 7 right now (writing from laptop).
So if the PC is running there shouldn't be any problems with the PSU? It's either it works correctly or not at all.

I feel so stupid for not noticing the ram. Thanks a lot for all the help

[Dark Mantis]

Please do not be lulled into a false sense of security. Even if it is working now it could give up at any time and you could lose a lot of hardware in  a worst case scenario.