"The 3 184-pin DDR DIMM slots on the this board allow for up to 3GB (3 x 1GB DDR sticks) of DDR memory. The Iwill KA266 fully supports PC1600 and PC2100 DDR memory, so users of Rev "C" Athlons or overclockers can take advantage
of 133MHz+ bus speeds. A new feature on the 1.3 revision is the ability to adjust the memory voltage via jumpers on the top-right of the board."
FULL STORY @ RIZENET (http://www.rizenet.com/hardware/ka266-r/)