I just spoke with Paul at Coast to Coast Memory. They Sold out of the 512meg for $55. He just told me that they have 128 meg Infineon(major manufacturer)for $39! They are compatible with the 6400's. The memory is ECC, REGISTERED Cas 2. The phone number is 1-800-4Memory. Try to get Paul at ext. 728. I think he said they have like 20 or so modules left. Hurry up! The shipping was like $6.50 for regular mail. I buy from these guys all the time. They usually have really good deals on memory.
Later Fellas
Goat
Later Fellas
Goat