Hi there Geeky Community,

 As per my recent posts, I recently upgraded my PC to at least 4X the specs of my 5yrs old PC:

 

• i5 CPU
• 800W CPU
• 8GB DDR3 1600MHz (PC3 12800) RAM
• HD 7850 2GB OC video card
• Gigabyte GA-Z87-D3HP LGA 1150 Intel Z87 HDMI SATA 6Gb/s USB 3.0 ATX MoBo

 Strangely, my new PC is struggling to play Day of Defeat when connected to my monitor (Samsung PS-42C7S - 42" plasma) i.e. serious lagging when moving the mouse fast and poor picture quality (lowering resolution helped slightly).
 However, when connected to an older, smaller LCD monitor, everything runs/looks absolutely perfect.

Question: Is my plasma monitor the problem?

Cheers guys.