All TriGems are made under license... In other words, they are copies of boards, so anything is possible. But the HP 9855 does have four memory slots and each has only 256 MB... so it may not be called Dual Channel but it sure looks like it.
Actually it is a 9855a model and only has 2 memory slots. And because I am unsure, I decided to buy 1 1gb stick of regular memory so the point is as they say moot. Thanks for your input :>)
According to the online reports from HP, you must have stated the hp p9855a model number incorrectly, because I didn't get close to the same thing when I went to the HP site under that model number