Hi,
The intel boards that support dual channel are 875,865, and I think some 845 have dual channel. It's best to go with a dual channel package of ram because they are selling you two sticks of ram that have been tested and work with each other in dual channel mode. Were as if you used 2 different sticks of pc2700 they might not work in dual channel with each other. Hope this helps.
<font color=red>2.8C @ </font color=red><font color=blue>3.5 ghz</font color=blue> <font color=red>w/ slk-800u and smart fan 2, Abit IC7-G, 2 x 256mb Geil Platinum pc4000, Radeon 9700 Pro</font color=red> <font color=blue>375/335</font color=blue><font color=red>, 2 x WD Raptor in Raid 0</font color=red>