Before you turn on the ATX Power Supply, you must connect it to the working motherboard, because the ATX Power supply is only working through motherboards before the voltage from the connectors can be measured and the fan inside the power supply starting to run. StarPower ATX Switching Power Supply - 600Watts w/Dual Fan (24/20-Pin Combo) Regular price: $79.99 Sale price: $39.50, 5/$185.00 Apact FSP145-50NI Micro ATX 145Watts Switching Power Supply Regular price: $39.99 Sale price: $17.00 StarPower ATX Switching Power Supply - 500Watts w/Dual Fan (24/20-Pin Combo) Regular price: $59.99 Sale price: $26.00, 5/$120.00 POWMAX LP6100A Micro ATX 230Watts Switching Power Supply (Pentium 4 & SATA Ready) Regular price: $49.99 Sale price: $22.00 Pentium 4 Ready ATX Power Supply - 450Watts w/Dual Fan (24/20-Pin Combo) Regular price: $54.99 Sale price: $19.75, 5/$92.50 POWMAX LP6100AA Micro ATX 300Watts 20/24-Pin Combo Switching Power Supply (Pentium 4 & SATA Ready) Regular price: $59.99 Sale price: $24.00 Pentium 4 Ready ATX Power Supply - 400Watts (24/20-Pin Combo) Regular price: $39.99 Sale price: $16.50, 5/$75.00 250 Watts Micro-ATX Power Supply 150 x 100 x 85 (mm) - for e-Machine/HP Regular price: $49.00 Sale price: $26.00 Pentium 4 Ready ATX Power Supply - 300Watts Regular price: $35.00 Sale price: $14.00, 5/$65.00 AT Power Supply - 200Watts Regular price: $35.00 Sale price: $15.00 Suntec P4/AMD 20/24-Pin 680W ATX Power Supply w/ (2) 80MM Low Noise Fan (Retail) Regular price: $79.00 Sale price: $39.00 iMicro Clear 550W Dual-Fan 20/24-Pin ATX Power Supply Regular price: $69.00 Sale price: $49.00 Topower/Epower ZUMAX ZU-750W 750W ATX12V 2.0/EPS12V Active PFC SLi Power Supply Regular price: $179.00 Sale price: $139.50 6" Power Splitter Y Cable Regular price: $3.00 Sale price: $1.50, 10/$10.00 20-Pin to 24-Pin ATX Power Supply Converter Cable Regular price: $10.00 Sale price: $4.00, 10/$30.00 12" Power Splitter Y Cable Regular price: $5.00 Sale price: $2.00, 10/$15.00 StarPower Aluminum ATX Power Supply Tester (24-Pin/20-Pin) Regular price: $29.00 Sale price: $11.75 CoolMax PS-228 Aluminum ATX Power Supply Tester with LCD Display (24-Pin/20-Pin) Regular price: $34.99 Sale price: $19.50 Secure On-Line Ordering Site Tel: (888) 860-4416 Fax: (732) 416-8788 sales@pctekonline.com Business hours are from 10:30am to 7:00pm EST Monday to Friday 3 Kellogg Court Suite 11 Edison NJ 08817 Copyright (C) 1997-2011, PCTekOnline.com All rights reserved. Thank you for shopping at PCTekOnline.com !