How important is a PSU to be "recommended"?

[LuDaCriS66]

I have a generic case that came with a generic 300w PSU. I'm using an Epox 8KHA+ and an Athlon XP 1700+. I've been having a lot of trouble trying to get this computer to turn on properly. I've always figured that the mobo was shorting out on the case. That still might be the problem but I'm not so sure anymore. My brother was recently able to turn the computer on by flicking on the PSU and the power button at the front of the computer simultaneously. It doesn't work 100% of the time but it does work maybe once out of every 4 times.

Could it be the PSU being generic or not powerfuly enough? I'm running a GF3 Ti200 (or Radeon 8500 soon), a Pioneer DVD-115, HP CDRW 10x-4x-32x, SB Live! value!, and will be adding some fans.

I'll probably just move everything to an Antec SX1030 or SX830 case soon but for now, I'd like to figure out whats wrong here.

 

[Adul]

It is very important to system stability and proper functionality.

 

[whitelight]

i'm pretty sure a new psu will solve your problems. go for an enermax 330w or greater.

 

[veryape]

Well, it is important to have a decent ps but most 300 watts do the job ok. It just sounds like yours sh!t the bed.