CyberPowerPc?

[Trotter]

The 4670 would run COD4, but not on high. The 4830 could run it just fine. I can run it on my 3850 with no problems.

If you can find a 4770 it would be a great choice.

 

[iceyc0ld]

4770's are out of stock.

But I'd recommend the 4830.

Newegg.com - HIS Hightech H483QS512P Radeon HD 4830 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Desktop Graphics / Video Cards

Read the first review 3 games all on high.

Though you will need a 450 watt PSU for that card. May I recommend one?

Newegg.com - OCZ StealthXStream OCZ600SXS 600W ATX12V / EPS12V SLI Ready Active PFC Power Supply - Power Supplies

There u go.