As Vadim notes in RT-38475 we should only use /arch:sse on x86 platforms.

Using this option on x64 produces the following warning:

    "cl : Command line warning D9002 : ignoring unknown option '/arch:SSE'"

According to http://msdn.microsoft.com/en-us/library/7t5yh4fd(v=vs.100).aspx, "/arch:SSE ... only available when you compile for the x86 platform"