VIA P4M900 chipset - just buy 2 x 2gb DDR2 667mhz or 800mhz and it will work fine
the single and dual channel thing is a chipset related function on any *decent* chipset/imc but single channel essentially gives you the same total volume of ram so nothing to worry about
i did purchase 2 2gb wintec ampo heat dispursed ram @ 667 but the board wont boot with the second stick installed i actually purchased 2 boards and a total of 5gb 2, 2gb and a 1 gb but after installing the second stick in either board ram test @ boot will not finish and i end up in an endless reboot unless i hit delete or shut it down and sometimes it freezes in the bios settings screen no matter if i used the identical 2 gb sticks in one or used 3 gb combo. any other ideas?
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did you enable the interleave function in the bios by default it is OFF..?? also make sure the max load is set fo 4096 (4gb) not 2048 (2gb) just a quick heads up if you are using any 32 bit windows aside from windows7 your wasting money on 4 gb as MANY have 4 gb limits for some reason they only find 3gb.