How much power is necessary for my PSU

I think a better alternative is to post all ur system so all the ppl here can evaluate this info.

ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner - Bulk - OEM
Item #: N82E16827135204
Return Policy: Standard Return Policy
Protect Your Investment (expand for options)
$19.99


COOLER MASTER HAF X RC-942-KKN1 Black Steel/ Plastic ATX Full Tower Computer Case
Item #: N82E16811119225
Return Policy: Standard Return Policy
-$20.00 Instant
$199.99
$179.99


SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Item #: N82E16822152185
Return Policy: Standard Return Policy
Protect Your Investment (expand for options)
-$5.00 Instant
$64.99
$59.99


EVGA 012-P3-1578-AR GeForce GTX 570 (Fermi) Classified 1280MB 320-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video ...
Item #: N82E16814130692
Return Policy: VGA Standard Return Policy
$10.00 Mail-in Rebate Card
$359.99
1



CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Profile Desktop Memory Model CML8GX3M2A1600C9
Item #: N82E16820233186
Return Policy: Memory Standard Return Policy
-$10.00 Instant
$68.99
$58.99


ASUS P8Z68-V PRO LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS
Item #: N82E16813131730
Return Policy: Standard Return Policy
Protect Your Investment (expand for options)
-$15.00 Instant
$209.99
$194.99


Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor BX80623I52500K
Item #: N82E16819115072
Return Policy: CPU Replacement Only Return Policy
Protect Your Investment (expand for options)
$219.99


Microsoft Windows 7 Home Premium SP1 64-bit - OEM
Item #: N82E16832116986
Return Policy: Software Standard Return Policy
$99.99
1




COOLER MASTER Hyper 212 EVO RR-212E-20PK-R1 Continuous Direct Contact 120mm Sleeve CPU Cooler Compatible with latest Intel ...
Item #: N82E16835103099
Return Policy: Standard Return Policy
Protect Your Investment (expand for options)
$34.99


Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)
Item #: N82E16820148442
Return Policy: Limited Replacement Only Return Policy
Protect Your Investment (expand for options)
-$52.00 Instant
$249.99
$197.99


Thermaltake TP-1000M 1000W ATX 12V v2.3 & EPS 12V v2.92 SLI Certified CrossFire Certified 80 PLUS SILVER Certified Modular ...
Item #: N82E16817153149
Return Policy: Standard Return Policy


ASUS P8Z68-V PRO LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS
Item #: N82E16813131730
Return Policy: Standard Return Policy

Unless you plan on adding another 570 a quality 650W would be fine.
With a 2nd gpu you would need a 850+W psu.

even though the wattage calculator recomended 900 watt?

Calculators aren't the most accurate and if it's a makers they always up-sell.
My info is gathered from Guru3D and a power hungry 1366 test system used for their benchmark.
http://www.guru3d.com/article/geforce-gtx-570-review/8

550 would cover this build, with masses to spare.

think i should get

LEPA G900-MA 900W SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply

Unless you plan on adding another 570 a quality 650-750W is all you'll ever need.

can somebody tell me exactly why everyone is adding 14 at the end of every post? 14 or should i say the database?