I currently have a 300W PSU, and i'm wondering if the following spec. would require a higher wattage PSU due to the risk of overheating.Do you think i should purchase e.g. a 450W PSU?Athlon 2100XPASUS A7V333 mobo (most proberly)Corsair/Crucial XMS2700DDR333 CAS 2I'm just getting these last few queries out of the way, so i can purchase my new system. :-wave CheersWill

I have a similat spec to what you are suggesting the difference being an Athlon 2000XP.I was advised the get a 430 watt power supply to give the machine sufficient aditional grunt to support just about anything I could throw at it - so I did.

Hi Will, any good 300 Watt power supply should be able to handle your demands (it does depend on how many and which components are planned), but I

I learned from experience not to skimp on the power supply. There are electrical specs more important than the overall wattage rating that should be checked. Here's a great link] to an FAQ at amdmb.com that describes what to look for in a power supply. Here's an excerpt from the article:What should I look for in a Power Supply?First off, you'll want to make sure the 5V line is at least 20Amps. If the line is lower or has fluctuating current (you might see 20A+-5%) it will cause instability when the system is under full load. My recommendation is to make sure the 5V is very high, I like to go with 30A as a minimum. The same applies to the 12V line, which I like to stick around 18-20A. You'll want to be aware of those +-x% numbers as that can mean allot. If the Power Supply can't sustain the power you'll get random reboots and other such occurrences. Basically check to make sure the 5v+3v output to be greater than 180W.[/iDan