Overclocking and crossfire

Hi, I'm finding it hard to choose and PSU that could handle possible overclocking and crossfire.
My currect specs are
PCPartPicker part list: http://pcpartpicker.com/uk/p/p4Im
Price breakdown by merchant: http://pcpartpicker.com/uk/p/p4Im/by_merchant/
Benchmarks: http://pcpartpicker.com/uk/p/p4Im/benchmarks/

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor (£169.20 @ Amazon UK)
Motherboard: Gigabyte GA-Z77-DS3H ATX LGA1155 Motherboard (£70.52 @ Scan.co.uk)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£30.96 @ Scan.co.uk)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£50.16 @ CCL Computers)
Video Card: XFX Radeon HD 7950 3GB Video Card (£215.99 @ Dabs)
Case: Zalman Z11 Plus ATX Mid Tower Case (£48.71 @ Scan.co.uk)
Optical Drive: LG GH24NS90 DVD/CD Writer (£13.98 @ Novatech)
Monitor: Dell U2312HM 23.0" Monitor (£147.94 @ Amazon UK)
Operating System: Microsoft Windows 7 Home Premium SP1 (32-bit) (£65.64 @ Scan.co.uk)
Mouse: Razer Naga 2012 Wired Laser Mouse (£66.89 @ Scan.co.uk)
Total: £879.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-11-24 13:14 GMT+0000)

PC partpicker said it would take 576w whilst crossfire so I'm not 100% sure about what to pick
4 answers Last reply
More about overclocking crossfire
  1. another concern besides the psu - the motherboard you've selected is not one i'd consider appropriate for xfire; the secondary pci-e x16 slot only runs @ pci-e 2.0 x4 speed
  2. http://www.ebuyer.com/351597-gigabyte-ga-z77x-d3h-socket-1155-vga-dvi-hdmi-8-channel-audio-atx-motherboard-ga-z77x-d3h perhaps instead? as for psu i'd go with with about 700w+ just so you're not running the psu @ max load whilst gaming & killing it's lifespan. don't cheap out on a crappy one that claims to be powerful enough, go with a reputable brand with good reviews. a couple of options -
    http://www.ebuyer.com/235519-ocz-750w-fatal1ty-series-semi-modular-psu-ocz750fty-un

    http://www.ebuyer.com/257233-corsair-tx-750w-v2-psu-80plus-bronze-certified-cmpsu-750txv2uk
  3. So what mobo should i choose
  4. i'd choose one that supports xfire with 8 lanes going to each slot. if you're at a loss for an an exact make/model then check out the reviews section. http://www.tomshardware.com/reviews/z77-express-ivy-bridge-benchmark,3254.html that's the round-up that the motherboard i linked was included in & have a hunt around the reviews & round-ups for answers to any other issues you have too :) good luck with your build.
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