Soon I'll be retiring this old Pentium 4 based PC. The PSU died in it about a 4 months ago so I bought one from a guy in town (ACE POWER) runs fine right now but when I retire this one for a new high end build I plan to take the ACE out of this one and replace the cheap Bestec in the other HP my girlfriend uses. Is ACE POWER any better than Bestec? The Bestec is 250W and ACE is 400W.