>>>>> "sl" == Sigbjorn Lie <sigbj...@nixtra.com> writes:
sl> Do you need registered ECC, or will non-reg ECC do
registered means the same thing as buffered. It has nothing to do
with registering to some kind of authority---it's a register like the
accumulators inside CPU's. The register allows more sticks per
channel at the questionably-relevant cost of ``latency.'' Lately,
more than two sticks per channel seems to require registers. Your
choice of motherboard (and the memory controller implied by that
choice) decides whether the memory must be registered or must be
unregistered, and I don't know of any motherboards that will take both
kinds (though I bet there are some out there, somewhere in history).
There are other weird kinds of memory connection besides just
registered and unregistered, but everything has higher latency than
``unregistered''.
None of this has anything to do with ECC, though it may sometimes seem
to since both registers and ECC cost money so tightly cost-constrained
systems might tend to have neither, and quantities go down and profit
margins get immediately jacked up once you ask for either of the two.
hth. :/
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