Not really all that accurate...

If you want benchmarking to know how fast your machine really is, you should take a look at GeekBench. This tool isnt all that great on multi-threaded benchmarking, which means itll tell you that a Core i7 800 series processor (4 cores with hyper-threading and a 3+ GHz clock speed) isnt much faster than a Core i5 dual-core mobile processor (2 core with hyper-threading and a 2.5 GHz clock speed). GeekBench will point out the difference in performance.

Bill Somethingorother about Novabench