disadvantage is with a lot of STUTTERING.
specially those applications that are designed specifically as single threaded execution.

you be spending time searching the web with solutions like installing SP2, editing your registry, finding the right drivers for your video card and other periperals, installing MS hotfixes. setting the application to run on single affinity to one core,.. things like those.

but once you got all of the settings and installed the right hotfixes you will be smooth as silk. IF not, you will experience a lot of stuttering and a lot of crashes, instability and BSOD.

- g