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how big a power supply do i need?

how much power do i need? heres build http://pcpartpicker.com/user/sambo656/saved/w6BzK8 im guessing 500w or 550w or maybe 600w but i dont know for sure please help

 

Out of those choices, I'd go for 550W.

 

But I'd feel a bit safer with 650W, allowing more room for future upgrades, and if you're going to overclock.

~IMG

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(Assume everything is atleast 80+ bronze)

450w for a single gpu, 650 for a dual gpu, 800w for a triple gpu setup.

CPU: Intel Core i7 2600k | Mootherboard: ASUS P8z68v-Pro | GPU: EVGA GTX780Ti 3GB | RAM: Kingston HyperX Genesis 8GB (4GBx2) 1600mhz | PSU: Corsair AX760 | STORAGE: Samsung 840 Pro 512GB | COOLER: Noctua NH-C14 | CASE: Fractal Design Define R4 Pearl Black | Operating SystemWindows 7 Professional 64-bit |

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I'd get 550W.

Why do you need so many fans?

Case-NZXT H440 | Motherboard-Gigabyte Z77X-UD3H | RAM-Kingston HyperX Blue 2x8GB 1600MHz | CPU-Intel 3770K @ 4.3GHz at 1.215v | Heatsink-Coolermaster Hyper212 Evo | GPU-EVGA GTX660 SC | SSD-MX200 250GB | HDD-Seagate Barracuda 3TB | PSU-EVGA GS650

Mouse-Logitech G600 | Keyboard-Ducky Shine 3 MX Blue. white backlight | Headphones-Audiotechnica ATH-M50s. Beyerdynamic DT990

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The modular version of the CX-600, Corsair CX600M is probably the optimal choice for the build. If there is a bit more room in the budget you could consider XFX P1-550B-BEFX, an 80+ Gold, fully modular psu.

80+ ratings certify electrical efficiency. Not quality.

 

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