dual xeon build

[MindCrime]

Can anyone confirm if the dual socket t5500s come with the memory riser card or if its an option? I was just looking through the manual (memory stuff is conveniently at the beginning) and found the DIMM population to be a bit in depth. Oops, looks like the 2nd cpu is on the riser along with the memory.

ftp://ftp.dell.com/Manuals/Common/pr...uide_en-us.pdf

Also worth noting is the following:

Your computer uses 1066 MHz and 1333Mhz DDR3 unbuffered or registered ECC SDRAM memory. DDR3 SDRAM, or double-data-rate
three synchronous dynamic random access memory, is a random access memory technology. It is a part of the SDRAM family of technologies, which is one of many DRAM
(dynamic random access memory) implementations, and is an evolutionary improvement over its predecessor, DDR2 SDRAM.

Does the part in bold confuse anyone else? Is that unbuffered NON ecc ram and registered ecc ram? Or is that unbuffered ecc ram and registered ecc ram? I found some listings for some unregistered memory for t5500s but it was ddr3 1066 but if you search ebay or anywhere for that matter for "dell t5500 memory" you pretty much get ECC registered only. Everyone runs ecc/reg memory in these, right?