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600Q PSU good for 2x Nvidia 9800GT 1GB?

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Is a 600W PSU sufficient for this build?

Intel Quad Core 8300 2.5GHz
2x Nvidia GeForce 9800GT 1GB

If this is insufficient, what would be a recommended wattage?

I have looked at the following PSU to swap with the 600W, will it fit with my build (posted below) and is it sufficient?


Case ( Nzxt Guardian 921 Gaming Tower Case w/420W Power Supply w/ NVIDIA Side Window )
Case Lighting ( None )
Power Supply ( 600 Watt -- Power Supply SLI Ready )
Processor ( [=== Quad Core ===] Intel Core 2 Quad Processor Q8300 (4x 2.5GHz/4MB L2 Cache/1333FSB) )
Processor Cooling ( INTEL Certified Liquid CPU Cooling System kit )
Motherboard ( [SLI] Asus P5N-D Nvidia nForce 750i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394, Dual PCI-E MB EPU Technology )
Memory ( 4 GB [2 GB X2] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand )
Video Card ( 2x NVIDIA GeForce 9800GT 1GB w/DVI + TV Out Video - running SLI mode )
Video Card Brand ( === High Performance === eVGA Brand Video Cards [SLI enabled] Powered by NVIDIA )
Hard Drive ( 500 GB HARD DRIVE [Serial-ATA-II, 3Gb, 7200 RPM, 16M Cache] )
2nd Hard Drive ( None )
External Hard Drives [USB 2.0/eSATA] ( None )
CD/DVD Drive ( None )
CD-RW/DVD-RW Drive ( [** Special !!! ***] LG 22X Dual Format/Double Layer DVD±R/±RW + CD-R/RW Drive Black )
Sound Card ( 3D Premium Surround Sound Onboard )
Speaker System ( iBUYPOWER 2.1 Channel Stereo Super Bass Subwoofer Speaker System )
Network Card ( Onboard LAN Network (Gb or 10/100) )
Floppy Drive ( None )
Monitor ( LCD Monitor 22" Widescreen TFT LCD Monitor [Black] )
2nd Monitor ( None )
Keyboard ( iBUYPOWER USB Keyboard with 18 Internet Hot /Multimedia Keys Black )
Mouse ( iBUYPOWER 1600 dpi High Sensitivity Internet Mouse Black )
USB 2.0 Accessories ( Built-in USB 2.0 Ports )
Meter Display ( None )
Flash Media Reader/Writer ( 12-In-1 Internal Flash Media Card Reader/Writer Black )
Operating System ( Microsoft Windows Vista Home Premium + [Free 60-Day !!!] Microsoft Office 2007(Word, Excel, Outlook, PowerPoint, Access ....) 64-Bit )
Software/Game ( [Free Game] - Halo 2 Free with purchase of Microsoft Windows Vista operating system )
USB Flash Drive ( None )
MP3 Player ( None )
Video Camera ( None )
Headset ( None )
Power Protection ( ** iBUYPOWER Recommended ** Network 10/100/1000 LAN Surge Protector Assures integrity and stability of data communications + Strengthens system immunity against electrostatic discharges )
External Wireless Network Adapter ( [Special !!!] Wireless 802.11g 54Mbps PCI Adapter )
Wireless Network Access Point/Router ( Zonet ZSR1124WE 802.11g Cable/DSL Wireless Broadband Router w/4-Port LAN Switch includes 3dBi + 6dBi Omni-Directional Antenna for Wider Coverage(outdoor: upto 1312 ft.) )
Warranty ( Warranty Service Standard 3-Year Limited Warranty + Lifetime Technical Support )
Rush Service ( Rush Service Fee (not shipping fee) No Rush Service, Estimate Ship Out in 5~10 Business Days )

Thanks for any information!!!!
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Your existing PSU would be enough to do the job. I personally would go with the 750 as it would guarantee upgradability in the future. Also with the SLI compatible on the 750 you will be assured that any newer SLI cards you may want to upgrade to will be able to be powered correctly. I hope this information was helpful and if there is any other help you will need please feel free to ask.
I also found the Same PSU Here for 35.00 cheaper with the rebate. You may want to take a look.
Good luck and let us know how everything works once you have decided.
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