Just having a poke about the Steam forums, and someone's posted this solution for stuttering/freezing gameplay:
1.Locate your Black Ops players folder:
C:\Program Files\Steam\steamapps\common\call of duty black ops\players
2. Open config.cfg in Notepad and find (ctr+f)
seta r_multiGpu
and
seta r_multithreaded_device
3. Set these values accordingly
If you have multiple graphics cards then set multiGpu to "1" otherwise, "0"
If you have a multiple core CPU set multithreaded_device to "1", otherwise "0"
Can someone test this and report back? I'm still at work so I haven't had the chance to try this, please don't shout at me if your PC melts and your hands fall off.
Seems alot smoother, and was smooth for the whole map.. Then got DC'd on the next map.
seems to make a slight difference, still a little stutter but not half as bad, only tested for 5 mins will test for longer later tonight
back to laggs now =/