We have two identical servers with the following specs:
- 4 sockets containing AMD Opteron 6172 at 2.10 GHz each of which have 12 cores
- 64 GB RAM
One runs Windows Server 2008 R2 Standard, which therefore can use 48 cores and 32 GB RAM. The other runs Windows 7 Professional, which therefore can use 24 cores and 64 GB RAM.
I ran a single threaded performance benchmark and the Windows Server machine was 1.5 times slower.
Any there any suggestions as to how I can find out why Windows Server is so slow?