Want A Cheap But Efficient Upgrade For Gaming

[IndexZorro]

My iMac specs:

Model Name: iMac
Model Identifier: iMac7,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 1 GB
Bus Speed: 800 MHz
Boot ROM Version: IM71.007A.B00
SMC Version (system): 1.20f4
Serial Number (system): W87330FUX85
Hardware UUID: 00000000-0000-1000-8000-001B639A3186
GPU: ATI Radeon HD 2400 XT

Version 10.6.8

I want to know what the cheapest but most effective upgrade I can do for my Mac to game better. Note that the only game I really play is Team Fortress 2 and I want more frames per second on it.

Any help would be appreciated

 

[flopticalcube]

Upgrade the RAM to 4GB or Sell it and buy one with at least a HD4870.

 

[IndexZorro]

Where should I buy it?

 

[flopticalcube]

http://www.crucial.com/

 

[peglegjack]

Note that that computer will actually take 6GB of RAM. You just need a 4GB and a 2GB stick.

 

[forty2j]

For TF2 you'll probably need to drop down to a lower resolution than native.

Really, there's not a lot you can do to make a 2007 iMac better at modern games. Trust me, I know..