PSU question - dual 7900GTX and PCP&C

[Sovereign]

With the following config, is the 510ASL enough for the dual 7900GTXs? nV says no, only the PCP&C 850/1k are....
CPU Cooler - ZALMAN CNPS7000B-AlCu LED 2 Ball Blue LED Light Cooling Fan/Heatsink - Retail
CPU - AMD Athlon 64 X2 4800+ Toledo 2000MHz HT Socket 939 Dual Core Processor Model ADA4800CDBOX - Retail
Memory - CORSAIR XMS 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 500 (PC 4000) Unbuffered Dual Channel Kit System Memory Model TWINX2048-4000PT - Retail (gonna OC)
Motherboard - MSI K8N Diamond Plus Socket 939 NVIDIA nForce4 SLI X16 ATX AMD Motherboard - Retail (MaxPC raved about this thing)
Graphics - 2x eVGA 512-P2-N570-AX Geforce 7900GTX 512MB GDDR3 PCI Express x16 Video Card - Retail (w00t!)
PSU - PC Power & Cooling 510 SLI-PFC ATX12V 510W Power Supply - Retail
Case - SILVERSTONE SST-TJ05S-X Silver Aluminum front panel/door, 0.8mm SECC body ATX Mid Tower Computer Case - Retail
Fans - 2x Antec 77095 120mm Blue LED Light Case Cooling Fan - Retail
DVD Burner - PLEXTOR 18X DVD�R DVD Burner included Replaceable beige front bezel Black E-IDE/ATAPI Model PX-760A/SW BL - Retail
CD Burner - PLEXTOR CD Burner Black IDE Model PX-230A-BPS-BL - OEM
Hard Drive - Western Digital Caviar SE16 WD4000KD 400GB 7200 RPM Serial ATA150 Hard Drive - OEM
Use the built-in Creative SE for now...

[grunt]

http://www.newegg.com/Product/Product.a ... 6817104015

thats what I would use