Do i need a power supply this big for my build? Tags: Homebuilt Power Supplies Build Systems Last response: February 5, 2013 6:05 PM in Systems Share al10677 February 5, 2013 5:48:04 PM Hey im wondering if i need a 550W power supply for this build, or a 400w? Build: PCPartPicker part list / Price breakdown by merchant / Benchmarks CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor (£164.99 @ Aria PC) CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£24.00 @ Overclockers.co.uk) Motherboard: MSI Z77A-G41 ATX LGA1155 Motherboard (£62.99 @ Novatech) Memory: GeIL Enhance CORSA 8GB (2 x 4GB) DDR3-1600 Memory (£30.23 @ CCL Computers) Storage: Seagate Constellation ES 1TB 3.5" 7200RPM Internal Hard Drive (£43.82 @ Aria PC) Video Card: MSI Radeon HD 7950 3GB Video Card (£221.75 @ Scan.co.uk) Case: Silverstone SST-RL01B-USB 3.0 (Black) ATX Mid Tower Case (£35.16 @ Scan.co.uk) Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£49.98 @ Novatech) Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£12.98 @ Scan.co.uk) Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) (£67.96 @ CCL Computers) Total: £713.86 (Prices include shipping, taxes, and discounts when available.) (Generated by PCPartPicker 2013-02-05 19:46 GMT+0000) More about : power supply big build gpellis87 February 5, 2013 5:53:21 PM I would go with 550W. You definitely don't want to be right on the limit for power. al10677 February 5, 2013 5:55:21 PM What about 450W? Related resources How big of a power supply do I need - Forum How big of a power supply do I need ? - Forum How big of a power supply do I need ? - Forum How big of a power supply do I need ? - Forum How big of a power supply do you really need ? - Forum Can't find your answer ? Ask ! Get the answer djangoringo a b B Homebuilt system a b ) Power supply February 5, 2013 6:00:48 PM Stay with your current psu, the xfx 550w, you could get the xfx 450w, but i wouldn't recommended it. I'd get low profile ram, that geil ram has really tall heatsinks which could block the cooler. FinneousPJ a b B Homebuilt system a b ) Power supply February 5, 2013 6:05:10 PM Yeah the 550W is great, do you really need to save a couple of quid from a build of £700? Can't find your answer ? Ask ! Publish Related resources How big a power supply ? Forum Is my power supply big enough for crossfire? Forum How big of a power supply do I need ? Forum How big of a power supply do i need ? Forum Not sure how big of a power supply I need Forum How big should my power supply be? Forum How big of a power supply would I need ? Forum First Build . Need Opinions...and power supply Forum Is this too big of a power supply Forum What power supply is big enough? Forum Is my power supply big enough?? I NEED TO KNOW ASAP! Forum How big of a power supply do I need ? Forum HTPC Mobo+CPU ~$150 Forum More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !