AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ × 2
GeForce 9600 GT
6 GB RAM DDR2
In Unigine Heaven 3.0 running at Medium settings and fullscreen 1920x1080 XMir was slower than X server by literally 0.3 FPS and it had 9 points less. There is also that thing with GtkPerf being much faster on XMir than on X server with this PC. On XMir I get total time for all tests in the range of 8.30 to 9.10 seconds while on X this times go from 9.60 to 10.90 seconds.