Is my XPS power supply sufficient for a eVGA GF8800GT video card?

I purchased a Dell XPS in Oct 2004 and an now considering upgrading the GF6800GO video card that came installed to a eVGA GF8800GT card.  The problem is I understand new high-end video cards use a lot of power.  Will the power supply in my XPS be sufficient for the new card?  Thanks for any info.

The stats of my XPS follow (the only change I've made is to add another gig of RAM): 

Qty Part #   Description
--- -------- ---------------------------------------------
  1 221-5483 Dimension XPS Series, Intel Pentium 4 Processor 550 (3.4GHz) w/HT Technology and 1MB cache
  1 311-3766 1GB DDR2 SDRAM at 533MHz
  1 310-1582 Dell Quiet Key Keyboard
  1 463-4354 19 in (19 in viewable) E193FP Flat Panel Display
  1 320-4077 256MB Nvidia GeForce 6800 GTO Graphics Card
  1 341-0987 160GB Serial ATA Hard Drive (7200RPM)
  1 340-1927 3.5in Floppy Drive
  1 313-7222 Dell Application Back-up CD, Factory Install
  1 462-4610 No logging,Dell Support
  1 412-0688 Image Restore
  1 463-2282 Dell Owners Manual installed on your system,click on icon after system set-up to access
  1 420-4834 Microsoft Windows XP Home Edition,Service Pack 2,English
  1 420-4927 Windows Media Player 10
  1 310-4037 Dell USB Optical Mouse
  1 430-0742 Intel Pro 1000 Integrated PCI NIC Card
  1 313-2279 56K PCI Data Fax Modem
  1 412-0705 Adobe Acrobat Reader 6.0
  1 313-2603 16X DVD-ROM and 48X CD-RW
  1 420-4919 PowerDVD Software Decoding forDVD Drives
  1 320-0667 Sound Blaster Audigy 2 THX Certified Sound card with DVD Audio for Dimension
  1 313-4514 No Speaker Requested
  1 412-0667 Norton Internet Security 2004,15 Month
  1 412-0691 Dell Jukebox powered by Music Match
  1 412-0521 Dell Photo Album Standard
  1 461-3063 No ISP Requested
  1 412-0625 Dell/My Way Home Page
  1 412-0629 Microsoft Worksuite 2004, Including Money,With CD and Documentation,English, Factory Install
  1 950-1260 Type 3- Third Party At Home Service, 24x7 Technical Support, Initial Year
  1 950-3337 1 Year Limited Warranty
  1 950-9797 No Warranty, Year 2 and 3
  1 412-0360 Soft Contracts - Banctec
  1 960-2800 Technical Support, Initial Year
  1 960-2697 Dimension XPS, Specialized Support
  1 462-5372 Dell Media Experience