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I have 16GB of iRam for my 2008 MP. Great RAM, no issues and fast. Cost me around $350 for all 16GB.

I don't know about the newer RAM quality, but DDR3 doesn't need heatsinks because FBDIMM runs much much hotter, hence the need.
 
Wow
I thought the new ram had heatsinks on them. Haven't seen the apple ram in person yet on the new machines.
 
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