What monitor is this? Almost all the monitors at the office are 60 Hz so why the extra 100? Where do they get displayed?
Try higher settings as you seem to not be pushing the GPU hard enough.
Now the game closing could be a card or part in need of heatsink cleaning or compound but that's not what I read here.
Hi i just bought computer and played cs:go and works really well with 160fps but i thought the video card may be overclocked and i dont want it overclock until i get some fans and changed some settings in Radeon HD Manager and now when i play CS:GO it runs for a while and then the game closes. I have Intel Xeon E5420, Radeon HD 7670 and 4 Ram also this is desktop.