Geekbench is a totally awesome cross-platform benchmark that measures the performance of your computer's processor and memory.
Geekbench is a cross-platform benchmark that measures processor and memory performance. Geekbench was designed from the ground up to take advantage of the latest technology like multi-core processors and 64-bit operating systems.

Geekbench is available for Linux, Mac OS X, Solaris, and Windows, letting you compare performance across different hardware configurations and operating systems with ease.
Geekbench's processor benchmarks (every one!) run in both single-threaded and multithreaded modes letting you see the performance increase multiple cores (or multiple processors) bring to your system.
Geekbench is available in both 32-bit and 64-bit versions. Run both versions on a 64-bit operating system to see the increase (or decrease) 64-bit applications bring to your system.

Note: 64-bit benchmarks are only available in the registered version of Geekbench.
Geekbench features a number of benchmarks that use SIMD instructions (both Altivec and SSE) letting you see the performance increase SIMD-aware applications bring to your system.

The license of this software is Free Trial Software, the price is $19.95, you can free download and get a free trial.