Thanks Kenton. I did notice something interesting on our OEM board that is different than the standard MSI-7125 board. The pdf manual shows the slots as green,purple,green,purple while ours are green,green,purple,purple
May not mean anything. Other boards I have seen, and it's not many, have a different color for each memory channel
The other odd thing is the manual says don't use the purple slots unless the green slots are used. If you did that, you would get no dual channel (on the regular board, not the OEM) since you have to have a stick in each of the colors (not OEM) to get dual channel.
EDIT: Test Results
ONE 1GB stick of the PQI at 2700MHZ, ram at 166, 3 3 3 8...GO
ONE 1GB stick of the Ultra at 2700MHz ram at 166, 3 3 3 8...NO GO
TWO 1GB sticks of the Ultra at 2700MHz ram at 166, 3 3 3 8...NO GO
TWO 1GB sticks of the Ultra at 2722MHz ,ram at 166, 3 3 3 8....GO......Hmmmmmm.
Too hot of temps to try mem test at 2722MHz for me. Might need aftermarket HSF to do that.
Maybe be some convergence of HTT, CPU, divider...who knows...that the Ultra likes at certain settings, like 166 but not 133 . I did try swapping slots around too.
Looks like I will stay at 2600MHz, ram at 166, unless I get a better HSF