Hi,

What page size and resolution are you using? Also are you seeing these differences when printing on same printer and with same resolution from XP and 7 systems?

According to this article, WinXP and Win7 use different XPS rasterization services, and the service might choose to generate a full-page bitmap for a page rather than sending small stripes, so I suppose that might be happening on the XP system:
http://msdn.microsoft.com/en-us/library/windows/hardware/ff563662(v=vs.85).aspx

If that's the problem, I don't think you'll find a way to control it from WPF, but you might have to instruct your users to use lower resolution and poorer color formats, or upgrade their OS already. E.g. see the 600 DPI example above - it would take about 130 MB per A4 page if printing in true color and generating full bitmaps per page.

The print drivers might choose to send bitmaps to the printer when the print job contains graphics or postscript commands that are not supported by the device.

Stoyan