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How much wattage will I need to overclock my CPU and videoboard?

Last response: in Overclocking
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November 29, 2012 2:13:51 AM

IF I want to overclock my I7 2600 Processor and videoboard. I would like to overclock the I7 2600 to 4.5Ghz and moderatly overclock the videoboard. I would also like to have a little extra wattage to futureproof this build as I would like the option to add and SLI a second 670 in the future.

Here is the current spec.


- (Bought) Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics
- ASUS SABERTOOTH Z77 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
- DDR 3 16 GB 1866 mhz (Patriot Brand)
- Black Enermax Hoplite SECC ATX Mid Tower Computer Case ECA3220, w/ Side Window and 12cm Blue/Red Combo-LED .
- CORSAIR CX Series CX750 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply
- COOLER MASTER Hyper 212 Plus RR-B10-212P-G1 "Heatpipe Direct Contact" Long Life Sleeve 120mm CPU Cooler Compatible with Intel 1155
- Seagate 1TB Serial ATA/300 Hard Drive
- Black LG UH12LS29 Internal SATA 12x LightScribe Blu-ray Optical Drive, w/ 3D Playback and M-DISC Support, 16x DVD+R/-R, 4MB Cache. OEM
- (Bought) GIGABYTE GV-N670OC-2GD GeForce GTX 670 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
- (BOUGHT) Corsair Force Series GS 2.5in 360GB SATA III 6Gb/s Internal Solid State Drive (SSD), Model: CSSD-F360GBGS-BK. ds-dh

I got the video card today and it is a beast. fitting that it will be the heart of this beast. :D 

Best solution

November 29, 2012 2:26:16 AM

Use this to determine the PSU wattage required for your system. http://extreme.outervision.com/psucalculatorlite.jsp

Additionally you need to make sure that you have enough current capacity on the 12v Rail(s) to safely operate your graphics card(s) plus you will need a PSU that has at least two 6 pin PCIe connectors and two 8 pin (or 6+2 pin) PCIe conectors to run two GTX 670 graphics cards. The Power supply you picked out does NOT meet those requirements. This one does:CORSAIR Enthusiast Series TX750 V2 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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November 29, 2012 2:36:05 AM

Best answer selected by nirrtix.
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November 29, 2012 2:40:31 AM

accordingto the calculator I would need more than 750watts. So I would probably be looking at a 1000watt PSU
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November 29, 2012 2:48:17 AM

I lowered the aging and now it says 670 should be enough... maybe I should stay safe and get the 850 watt. I want to be safer than sorry, but I am totally unsure what some of that information on that power thing means.
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November 29, 2012 2:55:02 AM

Hmm, I was wondering why you were getting such a high recommended wattage. It certainly won't hurt anything to get the 850 watt PSU although a good quality 750 watt will work fine. Stick with good brands such as Corsair or Seasonic and you will be fine.
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November 29, 2012 3:00:28 AM

will do! Thanks again.
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!