Raids tend to chunk down no matter what, and wow isn't exactly a well optimized game engine. Plus most FPS loss in Wow is purely Addons, all damage meters and stat recorders take a huge toll on wow's FPS, I know for a fact on my old box (1090T X6 @3.6 , 16gb ram, and 2x 5970), with Damage meters enabled (and scrolling combat text) raids would bomb down to 20-30fps, with them disabled i would average 70fps
You need to overclock, even though i don't play mmorpg people have said more people i guess you guys call them raids? Can lag down a system. Basically overclock your cpu and you will be fine.
^+1 You def need to overclock that cpu
Overclocking helps with everything... am i right? huh huh "nudge nudge"
It helps with WoW. My OCed i5 2500k to 4.3 GHz isn't dropping below 40 fps in 25 man raids
Also forgot to mention one more thing, and I noticed myself. Running it in fullscreen improves FPS. If I ran in windowed, I drop to even 20s
Overclock that cpu, I overclocked mine to 3.7GHz and did not go further only because I wanted to keep memory at 1033MHz (increased cpu base frequency to 172 and decreased memory multiplier to 6x)?