Explaination of Octo Core RAM and Hard Drive differences

Question

From Macintouch
For those of you wondering about the Apple Knowledge Base Article #305352:
After some research this is what I have discovered:
Memory: The difference in the memory is that all memory modules have a little program embedded in them. Apple changed the program in the 8 core memory modules to make them play nicely with the new 8 core processor. Also, the new 8 core memory module has a larger heat sink.
Hard Drives: Notice that Apple uses the word "Kit" in the Knowledge Base Article. A "Kit" consists of a hard drive mounting sled and a Sata II hard drive. The sleds from the quad core Mac Pro are larger than the sleds in the 8 core Mac Pro. The smaller 8 core Mac Pro sled allows for greater air circulation, hence better cooling. The smaller 8 core Mac Pro sled can be used in the quad core Mac Pro but the larger quad core Mac Pro sled is too large to fit in the 8 core Mac Pro. Any Sata II hard drive will work in the new 8 core Mac Pro, with those having the 3gb transfer and 16 mb cache specs being the favored ones. BTW, Apple does not make hard drives, buys Sata II hard drives in the third party market, and at last check was using Seagate's.

Answer 1

Hmmm… interesting. While I'm not saying it's wrong as I simply don't know I do find the reasonings, or parts of them, odd for both.
the new 8 core memory module has a larger heat sink.
The new memory is still compatible with with the quad-core MP and if you look at the space between the DIMMs when mounted in the risers you'll not there's not a lot of space between them to begin with. So Ned scratches his head and wonders how they can be any larger without reducing the space between them such that it results in a net loss in available heat dissipation.
The sleds from the quad core Mac Pro are larger than the sleds in the 8 core Mac Pro.
How large are the sleds in the quad-core MPs in the first place?! They're barely larger than the drive with the same width, a recess to allow the sliding in of the sled as well as allowing a bevel for the screws and a small space at the end to get your fingers in to pull it out. It's barely more than a piece of metal bent in a L shape with a chunk cut out in the middle above the bottom of the drive. Ned is now using his other hand to scratch his head in confusion.