If each pair was a bank instead of each slot being a bank, would I get better performance if I plugged them in thus?:

|========|
----------------

|========|
----------------
Asus's US website seems to only have the international version of the Quick-Start Guide for the P4C-800 downloadable, but it turns out that yes, for une configuration à double-canal you need to install une paire de DIMM identiques in the blue slots, and/or une autre paire in the black slots.

Peter