Hello,
Tess, I usually enjoy and learn a lot from your comments, but we have to keep raw machine-level bandwidth and actual application performance seperated. Otherwise we're befuddling ourselves.
Gee, I wonder why Intel spent millions on developing it then?
http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3448&p=7
A single page read will give you the answer as to why it's not better than DDR2 right now. Especially with the "slow" DDR3 on our 2009MP.
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Two series of real world tests should make my point painfully obvious.
1) Anandtech compared DDR3 ram with varying speeds (from our own 1066MHz in our 2009 MP all the way to a 1866MHz + 2000MHz overclocked on other tests).
That's certainly not the same thing as going from triple channel to dual channel,
but keep on reading.
(Note: rest of the article is here, with LOTS of similar tests with other apps:
http://www.anandtech.com/memory/showdoc.aspx?i=3589&p=1)
2) Anandtech again, using Nehalem architechture: differences between DDR2 and DDR3. Full article here (
http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3448&p=1)
Ineteresting bit here:
WOW! A whopping 0% difference between dual and triple channel in real world useage.
So according to Intel themselves, our 2009MP memory is less than HALF the speed it needs to be to take real advantage of DDR3 (as stated in the article I linked to reply to your "Gee").
It's a bit like putting a huge water pump behind a small hose: theoretically the power (DDR3 bandwidth) is there, but that small hose (1066MHz) just won't let it through. (If that's not a mixed metaphor, I don't know what is!)
So unless I've badly misread some of those articles, I think the question is settled: in our machines, more ram > faster ram.
Loa