Help on first gaming computer built

So, I decided that this summer I'd try to build a new computer for the first time. I plan on using it for gaming and here are the components that I have chosen:

Motherboard: Asus P8Z77-V Intel Z77 Socket 1155 Ivybridge Ready Motherboard
CPU: Intel CPU Core i5 3570K Quad Core IvyBridge Processor with Coolermaster Hyper TX3 CPU Cooler
GPU: XFX HD 6870 DD cooling 1Gb AMD VGA Card Eyefinity Ready
RAM: Corsair Memory Vengeance Blue 8GB DDR3 1866 Mhz (2x4GB)
HDD: Seagate 1TB SATA 3 ST1000DM003 Performance Hard Drive

Appart from a case and optical drive, is there anything I'm missing or would need and is there anything I don't need / could do without. Also, can someone recommend a power supply because I have no idea how many Watts I'll need. Any help is appreciated, thanks.
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  1. Fill this out please:
    http://www.tomshardware.com/forum/261222-31-build-advice

    It's hard to help without knowing your budget, monitor size, etc.
  2. Approximate Purchase Date: next week

    Budget Range: 800-1000 euros

    System Usage from Most to Least Important: gaming, surfing the internet, watching movies

    Parts Not Required: keyboard, mouse, monitor, speakers

    Preferred Website(s) for Parts: scan.co.uk

    Country: Ireland

    Parts Preferences: none

    Overclocking: Yes

    SLI or Crossfire: No

    Monitor Resolution: (e.g.: 1024x768, 1280x1024, 1440x900, 1600x1200, 1680x1050, 1920x1080, 1920x1200)

    Additional Comments: need a suggestion for power supply


    Components chosen:

    Motherboard: Asus P8Z77-V Intel Z77 Socket 1155 Ivybridge Ready Motherboard
    http://www.scan.co.uk/products/asus-p8z77-v-intel-z77-s-1155-ddr3-sata-iii-6gb-s-sata-raid-pcie-30-(x16)-displayport-dvi-d-hdmi-atx
    CPU: Intel CPU Core i5 3570K Quad Core IvyBridge Processor with Coolermaster Hyper TX3 CPU Cooler
    http://www.scan.co.uk/products/intel-core-i5-3570k1155-ivy-bridge-quad-core-34ghz-5-gt-s-dmi-650mhz-gpu-6mb-smart-cache-34x-ratio-7
    GPU: XFX HD 6870 DD cooling 1Gb AMD VGA Card Eyefinity Ready
    http://www.scan.co.uk/products/1gb-xfx-hd-6870-double-d-cooling-4200mhz-gddr5-gpu-900mhz-1120-stream-processors-2x-dvi-hdmi-2x-mini
    RAM: Corsair Memory Vengeance Blue 8GB DDR3 1866 Mhz (2x4GB)
    http://www.scan.co.uk/products/8gb-(2x4gb)-corsair-vengeance-blue-ddr3-pc3-14900(1866)-non-ecc-unbuffered-9-10-9-27-xmp-150v
    HDD: Seagate 1TB SATA 3 ST1000DM003 Performance Hard Drive
    http://www.scan.co.uk/products/1tb-seagate-st1000dm003-barracuda-720014-sata-6gb-s-7200rpm-64mb-cache-8ms-ncq-oem
  3. Try to get low profile RAM to make sure it fits under that CPU cooler (corsair vengeance has a low profile version).

    You should get a better GPU with that setup. Consider the GTX 670 or Radeon 7850.
    http://www.scan.co.uk/products/2gb-msi-gtx-670-overclocked-28nm-pcie-30-%28x16%29-6008mhz-gddr5-gpu-965mhz-boost-1045mhz-cores-1344-2xd
    http://www.scan.co.uk/products/2gb-msi-radeon-hd-7850-twin-frozr-iii-oc-4800mhz-gddr5-28nm-gpu-900mhz-dl-dvi-hdmi-mdp

    Use the Newegg PSU Calculator to help calculate how many watts you need. Generally Corsair, Antec, Seasonic and XFX are good PSU brands. Try to find something 80+ certified.
  4. Thanks man, good advice :)
  5. If never going to CF/SLI then a 550W PSU is good (750W if you want to hedge your bets). Corsair, Seasonic, Antec, XFX are good.
  6. ~550-600w psu will fit your bill.

    examples would be this one which i think recon is pushing for, on paper stats, its a nice psu for its price

    edit: it does have a review on a review site, except that its chinese.

    if you prefer a more wattage psu, then there will probably be a large price gap between this an a 600w+ one.
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