I installed two additional sticks of Kingston Hyper X (all identical), giving me 2,048 MB, Dual Channel. The problem is it's only reporting as DDR333. See specs below.
In BIOS, memory frequency is set to 'Auto'... If I set this to 'Limit' (for OC'ing purposes), there's a set of options to lock the CPU/RAM frequency- problem is the 1:1 setting only gives DDR200, resulting in downclocked RAM
I tested both pairs of DIMMs, no problems.