What size PSU for this build?

I'm looking at building a new gaming PC and have the following chosen:

Asus P8Z77-V LGA 1155 Intel Z77 - Motherboard
Asus GTX670-DC2-2GD5 GeForce GTX 670 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI - GPU
Intel Core i5-3570K Ivy Bridge 3.4Ghz - CPU
Samsung 830 Series 128GB SSD - HDD
WD Black 1 TB HDD - HDD

Im having problems determining what would be sufficient power for a build like this? What are some of the brands I want to consider and what are some I want to stay away from as far as PSUs?
8 answers Last reply Best Answer
More about what size build
  1. It depends on the case. The most common PSU size is Standard ATX, which is in 95% of all cases. There are many others such as
    CPX - An antec PSU size which is a third larger than ATX and fits a few of their Performance One series cases
    SFX - A Silverstone PSU size which fits in a small amount of their cases but does comes with an ATX adapter as standard
    Micro-ATX - A smaller and longer version of ATX but fits in most ITX and HTPC cases

    The companies I would go for a PSU are XFX, SeaSonic, Antec, OCZ and Corsair. All are excellent quality and deliver good performance.

    Companies I would stay away from are CiT, Ace, EZCool, Sumvision or any cheap power supply make as they have false power supply ratings, poor quality and give fewer cables than any good make.

    I recommend going for the
    antec HCG-400W -

    Corsair CX500 -

    XFX 450W core PSU -

    All are good value, give great performance and give a generous amount of cables.
    Hope this helps
  2. Best answer
    Im just going to make you a list of good, high quality power supplies suitable for this build.Ill sort them by their price before MIR.
    This is the power supply i thnk you should get as it's very efficient and is powerfull enough for two GTX 670's just don't try any overvolting on the CPU or the GPU as the pwoer supply isnt THAT powerfull.
    But if you're in to overclocking and you don't want your power supply to limit it then you should buy this one instead.It's less power efficient which might account to a power bill as much as 15 cents bigger a day.It also doesn't use a modular design.But in reality it can provide almost 1000W of power so... yeah.
    Seems your system shuld draw slightly more than 300 Watts when gaming. A good quality 450-> 600 Watt PSU sould be fine. If you plan on adding a 2nd GPU for SLI then probably recommend the 650 watt.

    Seasonic and Corsair (TX series) and PC Power and Cooling make excellent PSUs.
    There are a few others, But Highly recommend that you check for reviews, just google model - NO review - NO BUYee. You can get some idea by looking at the reviews on newegg, take with a grain of salt and only look at if Nr of reviews is say higher than 100.
  4. I've used Newegg's PSU calculator before. It seems to be on the conservative side. Remember to add a little extra voltage if OC'ing.

    You need AT LEAST a high quality 500 Watt PSU, but I would go with a mid grade 700 watt PSU to be on the safe side. (incase you ever SLI, add HDD's, add RAM modules, OC, w/e)
  5. ^ Reason PSUs are concervative is that they try to take into acount the "POOR" quality PSUs that many foolishly buy.
    "little extra voltage " I know you really meant little extra Current cabability. They should never increase Voltage.
  6. Thanks so much! this was all the info I needed. I think I will be going with the 650 watt corsair.
  7. Great Choice
  8. Best answer selected by echopapa.
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