Hello, I have an pentium 4 Acer Power series f5 tower which I need a new power supply for. The existing power supply is 15cm X 14cm X 8.5 cm and has a 24pin connection (model FSP300-60THA(1) 300W). The motherboard is ECS - RC410 M2 http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?DetailID=589&CategoryID=1&MenuID=16&LanID=9
The PC is just running the standard graphics card etc, no upgrades. Not used for gaming.
Are there any special specifications I need to find in a new power supply? - the mobo specs don't seem to give detailed info.
I also have another used power supply which is the same size, but only has a 20 pin connection and is 450 W (Eagle model no DR - B450E). Can this be used temporarily or permanently? - the PC works when this is plugged in, but some of the output amps are slightly different.