my computer died or is broken

A new computer will run you about as much as you want to spend, and it will be able to play CoD4, so lets say $1000.

If it is broken, the upgrade cost will depend on what is broke.

how much would a good base unit for newish games eg. COD4 cost? or if it's broken how much would a good upgrade cost.nerdy100

Well it could be anywere btw. 400-1000$

Tip:

http://www.newegg.com/Product/Product.aspx?Item=N82E16819116052

E2180 CPU 70$

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128059R

Motherboard GA-P35-DS3L 92$

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231170

memory G.skill 800mhz PC2-6400 (1Gb*2 = 40$)

http://www.newegg.com/Product/Product.aspx?Item=N82E16814500038

9600Gt 164$ with mail-in rebate = 139$

70+92+40+139=341$

What you migh also need is a PSU = add another 60$