Well this seems to be my experience so far, and at the "iluvmac" service there are modules that are for 2300 and some for 2300 & 280. I have a module that reports 24 total meg on the 2300, and only reports as 8 total meg on the 280c. (24-8=16 vs. 8-4=4) Apparently that module is reporting at 1/4th the ability for the pre powerpc's. Which is a crying shame. So I am starting to understand the mathematics of this. I currently have a 8 meg module in the 280c, bringing it to the total of 12 meg. Sigh! So Andy, which Duo do you have? Greg Goodwin / Doc Clu @><-- >------------------------