[znpy]

Might memory access model (UMA vs NUMA) play a role here? AFAIK the TR2950wx has configurable model (can be configured to work in either uma or numa mode) whereas the 2950x only has one mode (can't recall which one at the moment)

[snuxoll]

It's the opposite, the 2950X can be configured in (fake-)UMA ("distributed" mode in AMD's terms) or NUMA mode but the WX chips are NUMA only.