Gateway PC800-40 RDRAM

I'm looking to purchase more RDRAM for my Gateway desktop. The computer is only using 2 of the current ram slots, so I want to add another pair of sticks. It is currently using PC800-40 non ECC ram. I see that you also carry PC800-45 ram. What is the difference between these two, and would my two pairs be compatible? Also, what are the ECC specifications on your ram, and does that characteristic need to match between the two pairs?

PC800-45 is a slower type of memory compared to PC800-40 as the 40 / 45 pertain to the memory's latency. (the higher the number, the slower the memory)

Since your computer currently has PC800-40 installed, you will need to upgrade it with PC800-40 memory as well.
All of our memory is ECC memory, however, it can perform as Non-ECC in corresponding computers, and will work perfectly in your machine.

Our memory is guaranteed compatible and an be returned for any reason.
Please let me know if you have any other questions!
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