Which one of these graphics cards would you pick?

Will be buying one of these, so just wondering which one is better. Why is the Asus card dearer than the Gainward card?
http://www.komplett.ie/k/kcp.aspx?sku=386387&sku=461501&sku=478288
They’re all 9800 GTs, but with slightly different features. Thanks for your help
Edit: Current PC specs are:
Dell Inspiron 531
AMD Athlon 64×2 5600
4gb Ram
Vista Home Premium
Geforce 8600GT 256mb
PSU is 300 or 350watt… so will be needing one as well.
Answer #1
9800GT 1 GB
Answer #2
9800GT 1 GB
i agree.
Answer #3
Defo, go for the 1gb version bro
Answer #4
Without doubts the Gainward GeForce 9800GT 1GB PhysX CUDA.
Answer #5
Gainward GeForce 9800GT 512MB PhysX CUDA
Better clock speed, the ram (512mb /1 gb) makes no real difference in gaming performance, make should you have enough pc ram to compensate and this card will be better.
Answer #6
what are the specs to ur computer???
if u have a duo core 2 cpu with 2gb or more of ram and running windows xp or vista then the 1 gb card is the best bet…
BUT
if u dont have those specs of hardware then the asus 512 mb card would be better and this asus card is not restricted to any os meaning u can windows, linux, lindows, unix, mac, etc os’s depending on what os u prefer
Answer #7
Specs are:
AMD Athlon 64×2 5600
4gb Ram
Vista Home Premium
Geforce 8600GT 256mb
Edit: Thanks guys for the replies so far