That is wrong. If you intend to use your dedicated graphics card as primary display, you need a software like LucidVirtu to use QuickSync. I have been able to use QuickSync (i7 3770) perfectly with my nVidia as primary display in Windows 7. You can also use QuickSync with Optimus technology.
Anyway, I don't know why we're talking about the discrete card. I meant to use QuickSync at least with the iGPU as the primary display (which also works well on Windows 7, without having to use LucidVirtu course)