Gateway GT5404 and GT5408 Desktop can accommodate up to Intel Core 2 Duo E6700 (2.66 GHz, 4 MB L2 Cache, 1066 MHz FSB)
GT5404 Motherboard model number: D945GCL
GT5408 Motherboard model number: D945GCF (almost identical to D945GCL but with built-in FireWire controllers)
Source:
http://support.intel.com/support/motherboards/desktop/d945gcl/sb/CS-026624.htm
Want to play games like Skyrim, GTA IV, TDU2 , SimCity (5)? Heres a good GT5404 setup:
Intel Core 2 Duo e6700 (upgrade from Pentium D 915) = $40
GalaxyTech Nvidia GTS250 w/ 1GB GDDR3 Ram (upgrade from OB Graphics) = $50
2 x 2GB PC6400 800mhz Ram, 4GB Total (upgrade from 2 x 512 Mb PC4200) = $30
Most important, with the installation of a power hungry Graphics Card such as the one
I mentioned above, you will need to upgrade the stock PSU as well. I’m using:
Corsair CX430, 430w w/ single 28amp 12v rail, 85% or better eff. at max load = $40