I have successfully used 2 1GB sticks of 333MHz DDR memory in my M275. The specs and GW indicated only 1GB would work, but 2GB WILL WORK in the two slots (1GB in each slot). I think the chipset will only allow 333MHz memory speed - even if you bought 400MHZ memory it would only throughput at 333, so you'd be wasting your money on faster memory.
As for best pricing, that is a constant variable... there have been other good posts on this forum for trusted memory sources, but I have had good luck with Infineon memory.




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