I've just purchased an additional 2 x 4GB kit of memory from Crucial, having used their system scanner to ensure that I bought the right ones. My existing PC has 4 slots with the 2 x 2GB memory modules fitted in alternate slots, i.e. it's configured memory/slot/memory/slot. I believe that I should move the existing memory so that the 2GB modules are next to each other then fit the new 4GB memory in the next 2 slot next to one another, i.e. 2GB/2GB/4GB/4GB. Am I right, can anyone advise please.