PSU enough for 460 SLI and i7 950 OCed?

Please let me know if you think this power supply is enough for this SLI build and if not, please give me a recommendation. Also, I plan to overclock the CPU and GPUs. I will probably shoot for taking the i7 950 to either 3.8 or 4.0. Thanks for your comments in advance.

CORSAIR HX Series CMPSU-850HX 850W ATX12V 2.3 / EPS12V 2.91 80 PLUS SILVER Certified Modular Active PFC Power Supply [...] 6817139011

2 X GIGABYTE GV-N460OC-1GI GeForce GTX 460 (Fermi) 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card [...] 6814125333

Intel Core i7-950 Bloomfield 3.06GHz 4 x 256KB L2 Cache 8MB L3 Cache LGA 1366 130W Quad-Core Processor BX80601950

Crucial RealSSD C300 CTFDDAC128MAG-1G1 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)

CORSAIR DOMINATOR 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory [...] 6820145224

MSI Big Bang-XPower LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel Motherboard

ZALMAN CNPS9900ALED 120mm 2 Ball Low-noise Blue LED CPU Cooler [...] 6835118046

Antec P193 Gunmetal Gray Aluminum / Steel / Plastic ATX Mid Tower Computer Case [...] 6811129062

SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

LITE-ON Black 8X BD-ROM 16X DVD-ROM 48X CD-ROM SATA Internal Blu-ray Disc Combo Model iHES208-08 LightScribe Support

Dell UltraSharp U2410 Monitor - $499.99 [...] 2410&s=dfo
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  1. Yes, not only that, you probably have another 100-150 watt overhead. So you can even overclock with no worries!
  2. Thanks for the fast response and I'm glad to hear I have some extra capacity.
  3. No problem at all. Yours is a high quality unit. You made a great buy. Don't worry.
  4. No problems dude.That PSU is one of the best around and has enough juice for a GTX 460 SLI.
  5. +1 what the others said.

    Corsair is a brand that has a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty.
  6. How much does overclocking impact the power requirements? I mentioned overclocking my i7 950 to ~4.0 in my initial thread. It sounds like the 850 is plenty of power but I'm just curious how overclocking may impact the overall power consumption (if at all). Also, if I am within 100 watts or so of maxing out the power supply will it run louder and hotter. If I had more overhead room would it run quieter?

  7. Best answer
    You will be nowhere near maxing out the PSU. A pair of GTX460's need about 20 amps. The CPU will need about 10 amps. A maximum overclock will increase the power consumption of the overclocked items no more than about 25%. So you are talking about from 30 amps to maybe 38 amps at 12 volts.

    I doubt if the rest of the system will use 150 watts.
  8. ^+1 Your system probably won't use more than 550-600w loaded. :)
  9. Best answer selected by jsimpso55.
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