I've got the following three servers (all HP Proliant with single processors):
DL380 G7 with nine 2048mb x 1333Mhz RDIMMs (PC3-10600) for a total of 18Gb
DL360 G7 with six 2048mb x 1333Mhz RDIMMs (PC3-10600) for a total of 12Gb
DL360e G8 with two 8192mb x 1333Mhz RDIMMs (PC3-10600) for a total of 16Gb
I've been asked to increase the memory on the servers. I was thinking about adding 24Gb (an 8 and a 16) to each. I would take two of the RDIMMs out of the DL380 G7 to make room for the new RDIMMs. This would give me 38Gb in that machine. I would then have 36Gb in the DL360 G7. Finally I would use the two RDIMMs I removed from the DL380 G7 and use those along with the additional memory in the DL360e G8 for a total of 42Gb. I believe the plan is workable so far, but if I'm incorrect, please let me know. (Incidentally, the systems all are using ECC at 1.35V. Just want all the info out there.)
I've got HP branded memory in the machines now but I'd prefer not to spend the money on HP memory for this upgrade (since it is roughly twice the price). Crucial has 8Gb PC3-12800 RDIMMs for $100 and 16Gb PC3-12800 RDIMMs for $173. Crucial doesn't have PC3-10600 RDIMMs in 8 or 16. If I go with something like Edge, I can get 10600 16Gb at CDW for $192 (though these are marked as "call" whereas the ones that are available in 1-3 days are $280 which is inching closer to HP branded memory) and 8Gb for $105.
I assume that if I stick PC3-12800 RDIMMs in with my 10600 they will be downsampled to 1333Mhz. Am I correct? Is downsampling a bad thing? If it isn't a bad thing is it better to go that route and save the cash or should I go the Edge route and stick with all 10600 memory?
