That makes a difference. What CL mode?
Ok I can give you my results. i5-2500k clocked down to 2,0 Ghz, DDR3-1333-CL9 used (Sandy Bridge standard).
CPUMark 99
Sandy Bridge 2,0 Ghz= 306
Ivy Bridge 2,0 Ghz= 316 +3,3%
Cinebench 11.5
Sandy Bridge 2,0 Ghz= 3,18
Ivy Bridge 2,0 Ghz= 3,35...