Graphics card drivers up to date?Doesn't seem to be ping, play with show fps on and sometimes it will play 90~45 lovely even in packed nuketown server, and others it will drop right down to 15 soon as i shoot. If I just have another go at starting black ops up straight away it can be fine, can't tie it down to anything...
Also remember that this is/was horribly optimised for PC, might just be that tbh.