Profile command showing high GC ..

Hi...

I experience extreme and sudden fps loss ingame.. now I play with a low spec but know what to expect and have accepted I'll only be playing on low res with minimal gfx optitons on
..however...

Over the last month .. I cant get through a game without a sudden drop .. it happens instantly .. getting 30 - 40 fps one secobd ..then the next split second I'm getting 3- 5 fps

If I stayed ingame playing on 5fps I cant do anything ..but out of pure pigheadedness..one day I stayed playing and miraculously my fps went back to normal after about 10min of heartache. ..then approx 8min later went back to 3- 5 fps.

Now..ppl might saw its the number of entities on the server...the stage of the game etc.. butI passworded an online server and sat in it on alien team idling just waiting ... and sure enough ..after a little time my fps dropped..

Looking at the profile command .. my GC percentage is always high when rhis is happening

I assume this is Garbage Collection ... does this high % point to any possible causes I might be getting the fps crippling attacks?

I really hope someone can help

Thanks..

Bal