My secondary setup consists of the following:
Windows Vista @ 64Bit
E5300 Dual-Core @ 2.6GHz
4GB RAM
NVIDIA GeForce 9600GS
In 5 on 5 matches, I'm at a constant 128fps (capped). In deathmatch scenarios, I'm shifting between 80 and 120fps (4:3r; 1024x768p; lowest graphic settings).
I overclocked my CPU to 3.2GHz, defragmented and cleaned up my hard drive, updated my drivers as well as the BIOS, used the launch option "-high" in order for windows to run csgo.exe at a higher priority, forced the refresh rate, disabled unnecessary processes and used the Vista AERO skin @ 0% transparency in order to safe computing capacity, set windows to prefer using the CPU to run games instead of the GPU and forced my GPU to let the CPU prerender the maximum of frames (you have to be careful not to suffer from input lag of your peripherals IN-GAME with this though). You also want to remove the dust from your PC's fans regularly and even add additional fans (especially if you OC your CPU) as this helps your system's stability and allows for it to go all out on game performance.
Buy yourself a new graphic card and OC your CPU to keep up with it would be my advice.
2013-02-24 00:46:17