I have 4 upstreams here in Swansea which are mostly on qam 64 but 2 are known to be problematic and dance between qam 16 and 64.
AMD FX-8370 X8, MSI 990FXA-Gaming, 16GB DDR 3 Cosair Vengence 1600Mhz, 9351.1GB Hard Disk Space, 4GB Nvidia 960GTX PCI-E 16x Graphics, 850watt PSU.
Ex AOL Dialup 56k Customer....
Ex Freedom2Surf 512k and Ex Eclipse Internet 2mb Customer.
Virgin Media 350mb Cable.
Virgin Media R EVIL!!!