1. Dual-Xeon 3.6GHz 64-bit EM64T HT 4GB with Windows XP 64-bit
2. Dual-Xeon 3.6GHz 32-bit EM64T HT 4GB with Windows XP 64-bit
3. Pentium 4 3.0Ghz 32-bit HT 512MB with Windows XP Home

* the benchmark does not include thread testing. The small value is better.

Dual Xeon 3.6GHz 64-bit vs Dual Xeon 3.6GHz 32-bit: 33.54% Increase
Dual Xeon 3.6GHz 64-bit vs Pentium 4 3.0GHz 32-bit: 91.08% Increase
Dual Xeon 3.6GHz 32-bit vs Pentium 4 3.0GHz 32-bit: 43.09% Increase

The performance of Dual Xeon System with EM64T and HT enabled looks impressive.