Welcome to the forums.. A quick google search turns up quite a few video lagg posts in forums on SC2..
http://sc2.nibbits.com/forums/9/view/498/massive-video-lagmassive-video-lag [FIX] StarCraft 2 freeze/lag fix by
sultanaf on Apr.17, 2010, under
Windows 7,
starcraft 2 The Problem: I’ve been playing the long-awaited StarCraft 2 (Beta) recently and it doesn’t disappoint. I am running Windows 7 (64 bit) with an ATI Radeon HD 3400 video card. I ran into some complications while playing the game. Specifically,
it would freeze in-game for a while and sometimes long enough for me to be dropped from the game.
The Internet? At first I though it was my internet connection which was causing the lag. After some investigation, it turns out it wasn’t the internet connection (the game was also freezing during replays as well).
The Video Card? Next I suspected the video card was over heating. I ran a temperature monitor with a CPU monitor while playing the game. It seems that under normal game play, the temperature was around 70 C. Once the game froze, the GPU temperature dropped and the CPU usage spiked to 100%.
The CPU? After digging around a little bit, I came across a few threads on people having the same problem. They seemed to have fixed this problem by running the game on a single CPU core instead of the default multi-core setup. Specifically CPU 1 seems to be the magic core. I tried that but with no success. It was time to dig a little deeper.
The Solution: The problem lies with
Physx. StarCraft 2 comes with a version of Physx but with certain drivers, the latest version is required to run the game smoothly. Physx basically allows the game physics to be CPU powered rather than being powered by the graphics card. it is also referred by some as
Software Physics. Make sure you have the latest version of
Physx installed. it is required regardless of whether the you have an ATI or nVidia card. This should do it!
If you are still having this problem, add
-skipopenal -nocpubinding to the Target field of the StarCraft 2 shortcut and try again.
The following will help by telling StarCraft 2 to limit the behavior:
- Open My Documents\StarCraft II Beta\variables.txt using Notepad (or any other text editor)
- Add the following two lines to the file:
Frameratecapglue=30
Frameratecap=60 - Save the txt file and you’re done.
The
frameratecapglue variable controls menu screens framerates. The frameratecap controls the in-game framerate. I have chosen 60 as I am running this game on a laptop (60 is the max refresh rate for my monitor) but you can choose any number that fits your configuration.
Hope that helps you.. Looks like a PhysX or SLI profile problem to me.. Im sure im wrong but there is some useful information in this post to try anyway..