Its good to see someone actually searching through old posts to try and find answers.
I have an M65 with Quadro FX350m,which has the same performance under D3D as the quadro120m in games and mine plays Fear fine at 800x600 with the following settings
Average frame rate 42 FPS
Can also play at 1024x768 but have to turn most things to minimum or off for average frame rates of 32,Fear is one of those games that if your limited in power,looks better at lower res with higher settings than at higher res with everything turned down.
I was going to try higher res than 1024x768 but the current driver I am using won't allow higher than this even in program files/configuration.
I did try enabling shadows at medium and that took the average to 26 and also soft shadows avg 32,so those 2 settings hammer averages for not much in the way of looks IMO.
I would expect XPS1210 to be fractionally better [maybe 1 or 2 fps,not worthwhile]given the fact it has better GDDR3 video memory than the DDR2 of the D820/M65,someone who has an XPS might be able to compare to the above and bearing in mind I am using certified drivers at the moment instead of Laptopvideo2go ones,and I did the above tests with wifi and internet explorer running,so could probably get more performance.
I hope this helps you out.