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VirtualRain

macrumors 603
Original poster
Aug 1, 2008
6,304
118
Vancouver, BC
What kind of memory does the 3540/3520 Quad Mac Pro support?

Will it work with these Kingston Registered ECC dimms?
http://shop.kingston.com/PartsInfo.asp?ktcpartno=KVR1066D3Q8R7SK2/8G

If not, are there others that will work at this time?

Is the 8GB memory limit on the Quad's thought to be due to DIMM capacity (e.g. attributable to readily available 2GB DIMMS) or some limit on the memory controller?
 
What kind of memory does the 3540/3520 Quad Mac Pro support?

Will it work with these Kingston Registered ECC dimms?
http://shop.kingston.com/PartsInfo.asp?ktcpartno=KVR1066D3Q8R7SK2/8G

If not, are there others that will work at this time?

Is the 8GB memory limit on the Quad's thought to be due to DIMM capacity (e.g. attributable to readily available 2GB DIMMS) or some limit on the memory controller?

Any limit would be due to Apple marketing. The technology supports DDR3 PC3-8500 1066MHz memory in either Unbuffered non-ECC, Unbuffered ECC or Registered ECC.
 
Any limit would be due to Apple marketing. The technology supports DDR3 PC3-8500 1066MHz memory in either Unbuffered non-ECC, Unbuffered ECC or Registered ECC.
From what I can tell, it's a result of parts availability.

The 1066MHz Unbuffered they're using is CL = 7. Apparently nothing greater than 1GB or 2GB sticks available ATM. This should change shortly however. ;)

The only 4GB DIMM's I know are available, are Registered (1066MHz @ CL = 7). Offered for $200/DIMM from (here from Crucial).

Other CAS latencies could likely be used, as it's supported in the JEDEC spec, and by Intel. Even the 1333MHz variety on the 2.66GHz or above Octo models (X5550 & X5570), but CL = 9 in this case. Though I think either is actually possible, both higher latencies and clock speeds are untested on the '09 MP AFIAK.
the quad only supports 1gb & 2gb sticks?
See above. ;)
 
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