Ultra 550 wat LSP Series PSU

Hello again everyone, i inquired on a previous posting i made about a powersupply for an older computer, however after calculations of my system the modern psu's total 3.3v/5v output was too low for what my system needs.For those who may not know Tigerdirect.com retail stores are shutting down all but one are on liquidation( the last remaining store is in miami,fl where the main hq offices arein.. and is also the largest, however tigerdirect tends to be more expensive but is good for a quick something during a build) all power supplies in liquidation stores are 50% off so i purchased a Corsair CX750M for 50 dollars and the titles power supply an Ultra LSP 550 watt series, i know they are crappy, however this power supplies weight is heavy so it's not an undersized board, it does have anodia caps, and some taicon's,one teapo, jun fu's,sus'con however it does have what i need a heavy 3.3v/5v 190 watts which is what i need however i know it's an old computer, and it's probably never going to hit 300 watts in use, but i would appreciate suggestions is this a ok power supply to use considering the processor/motherboard age almost 13-14 years old are there any other suggestions on what to use that is 3.3v/5v heavy and at least a bit reliable, (i am still using my thermaltake xaser III 480 watt PS which is 5v heavy and is all teapo caps which is still going strong but i need another for another system)

Ultra 550 wat LSP Series PSU