OK, so I got a new shiny monitor (Viewsonic VX2370S) and trying to use it on the old PC - SiS760 graphics (i.e. shite) until new PC shows up.
I updated the SiS drivers so that is should work at 1920x1080, selected that on the display menu in the control panel, but the image doesn't fit - it's clearly scaling the pixels, the monitor claims it's 1680x1050, and if you move the mouse to the screen edge, it scans around to show the whole image. Basically, it appears to be treating the monitor as smaller than it should be.
Edited to say - 1680x1050 fills the screen, but must be scaled as it's not the native monitor resolution.
So it looks utter crap. Any ideas from the brain trust before I go back to the old monitor and wait for new PC to arrive?