Definitely something else is wrong on his machine.
At a resolution that is actually slightly higher than his, that card is supposed to be giving him 44 FPS. The standard edition of the 7970 should give him 40 FPS.
NOX COOLBAY Side Window Black; NOX Apex 600w Modular; ASUS P7P55D-E Socket 1156, Sata 6Gb/s & USB 3.0;
Intel Quad Core i5 760 2.80 Ghz @ 3.60 Ghz, 8 Mb de cache; Gskill Ripjaws 4 Gb DDR3 1600 Mhz CL8 Dual Channel;
ASUS GEFORCE GTX 560 TI DC II 1024MB GDDR5; Samsung 1 Tb 32 Mb SpinPoint F3; NEC 24x Sata black
Artic Cooling Freezer 7 Pro Rev.2;
2x Samsung SyncMaster S43NW 8000:1 (1440x900)
Logitech K120 Keyboard and Logitech Performance Mouse MX