At the end of our test suite, we examined the performance under Windows. That is to say we were interested in seeing whether using integrated graphics would adversely affect performance during normal "office-type" work in Windows programs. Our benchmark of choice for this test was Bapco's Sysmark 2002.
The results showed that none of the integrated GPUs have a negative impact on performance in Sysmark. Only the SIS315 returned a slightly lower score.