I guess you didn't read the article then.Now you guys are messing with my head! For the $1000 build you have the GeIL Black Dragon 4GB with the low CAS. For the $2000 build you go with the cheaper 6GB Mush with the higher CAS. I'm I seeing things - the 4GB seems to be the better memory??
Micron D9KPT is better memory (best mid-priced chips) no matter how it's rated. DDR3-1333 CAS 9 1.5V, DDR3-1333 CAS 7 1.6V, DDR3-1600 CAS 8 1.65V, and DDR3-1866 CAS 9 1.65V are the same stuff when they're based on D9KPT chips.
Newegg's photo showed Micron D9KPT on Micron PCB's, so the memory was ordered with the belief that Micron D9KPT would be delivered. The result would have been the highest-possible value.
It wasn't until after the memory arrived that anyone knew Mushkin had switched suppliers. If you want to read more about why the builder was so excited to see photos of D9KPT chips on such an inexpensive product, read these:
http://www.tomshardware.com/reviews/dual-channel-ram-ddr3-4gb,2618-8.html
http://www.tomshardware.com/reviews/6gb-ddr3-x58,2372-7.html
Both those award winners used D9KPT chips on Micron PCB's, and those modules have been used in the high-end SBM builds over the past year. Of course you'd know that if you'd actually read the article before committing yourself to ridicule, and since we only ridicule what we don't understand...-1