Hello Blizzard,
When I play on my 22 'inch monitor on high graphics I am good to go everything nice and smooth no graphics lags or issues BUT when I switch over to my 36 'inch HD TV/Monitor with same settings I get HUGE lag out and now I have everything on low just to not lag or have graphics issues. Anything I should know about this.

Also, I am use ATI Radeon HD 5700 Series.

Any help would be great thank you so much.