I run WoW pretty much ALL the time when I'm at my computer. I have Skype open in the backround, and usually 2-4 tabs of youtube/reddit/wowhead/music just stuff like that. Ever since MoP, I've noticed that my computer has been extremely slow when Alt+Tabing in and out of WoW. It usually takes around 4-8 seconds. It used to be instant.
Now my question is, could my RAM be causing this? I currently run with 4 GBs of this: http://www.newegg.ca/Product/Product...82E16820231277
Other relevant specs: i5-760 2.8ghz
Sapphire HD 6870
One last thing, if I wanted to upgrade my RAM, for example with this: http://www.newegg.ca/Product/Product...82E16820231314
Would it be possible? Or would I have to have 4 of the exact same sticks?