Need some Guidance, on Graphics Cards

I've just bought this PC:

INTEL Pentium D ''Dual Core X2'' CPU
- 64Bit Dual Core 6.8Ghz (2 x 3.4Ghz Dual Cores)

775Pin VIA Chipset Motherboard
- 3 x PCI Slots, LAN Port & 6 x USB2.0 Ports

1GB DDR400 PC3200 RAM Memory

200GB MAXTOR Hard Drive
- 7,200 RPM, ATA133 & 8MB Cache

16X DVD+/-RW Dual Layer & Dual Format

19'' TFT Monitor With Intergrated Speakers

UniChrome PRO 3D Graphics
- Great Performance Graphics
- AGP 8X Slot Available On Motherboard


Im aware i need a new decent graphics card, but im not sure on how the Geforce Graphics cards Accronyms. What graphics card should i get cost isnt really a problem. But the PC isnt PCI-express so i dunno whats the best to get... any opinions?

Ta

 

best agp card out there now is a 7800GS: http://www.newegg.com/Product/Product.asp?Item=N82E16814150131
http://www.newegg.com/Product/Product.asp?Item=N82E16814130274

the cards above are the best 7800GS's although they are a bit more expensive than this one, clocked only slightly lower: http://www.newegg.com/Product/Product.asp?Item=N82E16814143046

($100 cheaper than the above cards after rebate)

 

Thanx matey.

 

im guessing u didnt build this urself? you may need a more powerful power supply to run that beasty card. Can u check the wattage of the PSU? (gotta open the case and check the sticker on the side of the PSU)

 

Havent Recieved the PC yet, Still waiting on it being delivered.

its 450W PSU

 

ok good, that should be fine

 

On a side note, Intel doesn't have any 6.8 GHz cpus. That is two seperate 3.4 GHz cpus, via their OLD Core duos.

On the 7800 GS AGP: Read:

http://www.tomshardware.co.uk/2006/09/26/the_best_gaming_video_cards_for_the_money_uk/page7.html