Ok, I'll see if I can find the corect specs for 1600mhz.
In the mean time, I checked my details again (having done nothing more than rebooting)...
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: System memory performance assessment ''
> Run Time 00:00:05.13
> Memory Performance 20936.78 MB/s
> Total Run Time 00:00:06.43
This is really bizarre
Winsat and Blackbox dont agree on memory bandwidth