NEW Replacement Power supply for a Dell Optiplex GX280 NPS-305ABC Rev. 04 . This is a brand new aftermarket power supply with a higher power rating and capacity, also this power supply offers additional power protection features. This Power Supply is guaranteed to fit a Dell Optiplex GX280 NPS-305ABC Rev. 04. Connectors Includes: 1 x ATX Connector 24 (20+4) Pin (12 inches) 1 x P4-12V 4 Pin (12 inches) 1 x Dell Motherboard/Aux 6 Pin (12 Inches) 1 x HP Video 4 Pin (12 Inches) 2 x SATA 15 Pin (12 inches, 18 inches on same wire) 3 x Molex 4 Pin (12 Inches, 18 Inches, 29 Inches on same wire) 1 x Floppy 4 Pin (35 Inches on same cable as the molex connectors) Dimensions: 5.86" x 3.3" x 4" Output Power 400 Watts Input Votage 115/230 Volts AC Frequency 60/50 Hz MTBF 100,000 Hours on Maximum Load at +25C Rise time Less than 70 ms Hold-up Time 17 ms Minimum at Nominal Input Voltage Output Voltage +5V -5V +12V1 +12V2 +3.3V -12V +5V-SB Current 13A 0.5A 14A 14A 13A 0.5A 2.5A Warranty 1 Year Warranty Shipping Options: Free Priority Mail 1-3 Day Shipping to USA Residents Upgrade to USPS Express Mail for the calculated cost of a 3 Lb. Package International Buyers will pay shipping costs for delivery based on 3 LB package shipped via USPS Priority mail, or choose to use's Global Shipping Program we partner with. *All orders process and ship same day, Monday - Friday, 3:00 PM EST Shipping cut-off. Return Policy: We offer a 30 day no question asked return policy. If you are unsatisfied or do not want the item for any reason, Simply return the product for a full refund. Return for refund or replacement within: 30 days. Manufacturer Warranty: Keep your invoice for a 1 Year Manufacturer Warranty that is included. We will help you with the manufacturer warranty if you need. Parts: 1 year limited Labor: 1 year limited Sales Tax for Michigan Residents: Michigan residents are required to to pay 6% Sales Tax. International Buyers/Import Duties: International buyers please understand that you will be responsible for import duties in your country if they exist. Do not buy this item if there are import restrictions for the item in your country. Contact Information: Questions, comments and concerns? Contact us. We are here to help! Send a message: via's message system. Talk to a human: via phone: (989) 278-TECH(8324) This replacement unit says it is 300 watts, that is higher than what is currently in my computer, are you sure this will work? The 300 watts is a maximum output. This will work perfectly with your application.Think of it as extra power if it is needed. Otherwise it just uses the amount it needs. For more information please read the next response below. If I order this power supply, when can I expect to receive it? Items ship same day, the shipping cutoff is 3:00 PM EST., Monday - Friday. Thus Orders received after 3:00 PM EST on Friday will ship on Monday. Items Ship for free via USPS Priority mail, This service takes 1-3 business days depending on your location. ****** End of Seller Description ******