I have an i7 920 D0 stepping and ive been getting low cpu scores in various benchmarks like passmark and cinebench. i looked up other peoples scores with the same processor at stock and overclocked and theirs is much higher. I overclocked my i7 920 to 4GHz and in geekbench, its floating point score was only 11,000. Other's cpus were nearing the 20k mark at 4GHz. why is this?