How do i set up SLI? Help!

Hi every im wondering if someone can help i normall use my system for all my music software movies and entertainment tv link my my 50" plasma. Now i have an nvidia 7300le 512mb HD DVI card but i have just dicovered the game Crysis!
NOW i want to run this in the highest setup i can in HD now i have seen the 8500gt and the 8600gt do i have to buy 2 of these to get the best setup if so how does SLI work do i kind of connect them together somehow? how will this be better for me?

All help will be much appreciated!! cheers my spec:

XP Media Centre Edition
Q6600 2.66 Quad Core 8mb L2 Cache 1066FSB
3Gb Dual Chl DDR2 RAM
Gigabyte GA-P35-DS3L 1333FSB
250Gb WD Caviar HDD x 3
320Gb Barracuda HDD
80Gb Barracuda HDD
Geforce 8 512Mb Pci-e DVI HDTV

 

Those two cards are woefully inadequate even in SLI. You need at least one of the 8800's in SLI or the new 9800 gx2. If you go with the 9800 you'll probably need a new PSU, if you go with the two 8800's then you'll definitely need a new PSU. To use SLI you have to have two identical cards an SLI Bridge and of course an SLI capable mobo (which you dont have).

This is assuming you absolutely must play Crysis at the highest settings and at a high resolution. If you can live with turning them down a bit then you could just get the 8800gts 512 MB (G92 version) and you'll be able to play great at near max settings.

Personally Crysis isnt a game worthy of that much money and effort.

 

I thought it was good is there etter looking graphics if so what games 8800`s a bit much money i think the 8600gt i saw said it was 1gb i thought that was good enough not sure! whats the best i would get out of the 8600gt sorry new to gaming only play a few on the pc!

 

Alot of people think that graphics card memory is everything (cant really blame em since thats the number that they like slap on their boxes in huge print) but its not, its only one of many specs to consider. Just for a point of reference two 8600's SLi'ed together is still inferior to a single 8800gt. Yes its very expensive but as you know Crysis is the most demanding game out there. If top of the line hardware were cheap dont ya think everyone would have it : P

The 8600gt is a great mid range card. You'll be able to play most games at max/near max settings just fine.

Heres a great site to compare graphics cards. http://www23.tomshardware.com/graphics_2007.html

 

True! i suppose i just better get a better card that i can afford and make do maybe reconsider about the games i wanna play im tempted in the PS3 anyway for the blu-ray but thought it would be easier as i already have a good pc but thanks for the info!