I have a mid 2010 MacPro 12 2.66 Ghz cpu system with 48 GB of ram. I was running Windows 7 32 bit on my Apple SSD drive, but thought that it would be interesting to see the performance difference if I installed Windows 7 64 bit. Due to SSD space limitations Windows 7 64 bit was installed on an internal hard disk rather than the SSD drive. Here are the results: Windows 7 32 bit on Apple SSD TS512B configured with 2 GB of RAM 8 CPUs Enable Adaptive Hypervisor checked Processor 7.7 Memory 4.5 Graphics 6.0 Gaming 6.0 Hard disk 6.9 overall 4.5 (lowest score). Windows 7 64 bit on Hitachi 2 TB drive HDS722020ALA330 configured with 8 GB of RAM 8 CPUs Enable Adaptive Hypervisor checked Processor 7.8 Memory 7.9 Graphics 6.0 Gaming 6.0 Hard disk 7.9 overall 6.0 I was surprised by the increase in memory speed, and even more so by the hard disk improvement - even though on a physical disk rather than an SSD. In two cases (memory and hard disk) it hits the maximum performance number possible of 7.9.