Starcraft 2: Low FPS during large battles

[sancco]

So I've got a decent computer.

i7 920 @ stock
Gigabyte HD7970 OC Edition
6GB RAM 1333MHz
SSD
Windows 7

Yet when I play multiplayer games, and when there are large battles, I get single digit FPS (1-9fps). Normally I'd get it maxed out at 60fps V-Synced.

I've got triple buffering on and V-Sync forced.

I play BF3, Crysis 2, Spec ops The Line, all fine.

Any clues what's causing this?

 

[simon12]

If its only on multi player it could be the other player/players, someone I play it with lags everyone else if he forgets to put his laptop on high performance instead of power saving.

 

[amarante]

If other games run fine then the problem might be with Starcraft 2. Have you tried playing a match with all settings turned low?

Just in case to be sure. Use HWMonitor: http://www.cpuid.com/softwares/hwmonitor.html

Let the program run in the background when you play Starcraft 2. It might also be a overheating issue.