I think if memory bandwidth were the only consideration, the performance would be better with any board supporting DDR333. However, there are a lot of other factors. The Asus P4B533-E will support DDR333 without overclocking the CPU, and only slightly overclocking the memory. I think stability is important, but a lot of boards will overclock and remain stable for quite a ways above the processor's rated speed. Most of the 845G boards will support DDR333 without much work, and whether or not it's officially supported is kind of a moot point.