This is horrible for a laptop advertised as a "top notch gaming laptop".
It runs no lag on a NVidia mobile card with only 512MB of video RAM. I've been playing it fine on my Sony Vaio VGN-AR890U for a month now. Second attempt at medium video settings and the system started lagging a little, but still got into this audio loop problem. I had to do a hard power off after 20 minutes of listening to a horrible audio loop. No keyboard input, mouse input, power input, LCD keys, NOTHING. However, after a few minutes of play the audio started looping and I got a black screen. Starcraft 2 stopped lagging and became ALMOST usable.
#768 STARCRAFT II DRIVER#
I upgraded to the latest ATI Radeon driver from the ATI website, version 10.07. If you set it to 1920x1080 and cranked up to even medium settings the video lagged horribly. When running Starcraft 2 it simply stated "card not supported" and defaults to 1024x768 resolution and lowest video settings.
Why? Video rating for 3D and games was a 2.0. Windows 7 reported a Windows Experience Index of 2.0. I started with the built-in Radeon Catalyst drivers. Twice now the game has hung in a video loop. If you use anything but the lowest settings the game will randomly lag & often kill all video going to a completely black screen. Well it turns out that the "top of the line gaming laptop" cannot play Starcraft 2 properly.