What size PSU should I get for this setup?

Hello, I'm looking to buy a new Power Supply to replace my recently deceased one. My specs are as follows:

Biostar TA790GX 128m Main board
Athlon64 X2 5200+ OC'ed to 3.10ghz
2 Sapphire Radeon HD 3870 X-fire'd
6 Gb PC26400 Ram
1 DVD-RW drive
1 5400rpm 1.5Tb HD
4 110mm case fans (3 with LEDs)
1 Internal Media Card reader

I tried the Newegg PSU calculator but it didn't have my GPU's listed. My PSU was a 650w but it died a week after I upgraded to the dual graphics cards from a Geforce 8800gs.
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More about what size setup
  1. this is a double post and should be closed
  2. 500w is plenty
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