http://supermicro.com/Aplus/motherboard/Opteron/HT1000/H8SSL-i.cfm which is built around the ServerWorks HT1000 chipset, which acts like BOTH the AMD 8132 and 8111 chipsets found in the x4500's and various other AMD systems we have.
Kingston 2 x 1GB DDR 400 ECC memory (filers use ElPida memory chips).
AICIPC/AIC 16 hotswap SATA bays, 3 x power supplies (2+1) http://www.aicipc.com/Category.aspx?ref=RSC4U
Areca/Tekram 1160, 16 port SATA RAID controller http://www.tekramonline.com/arc1100detail.html
Western Digital 400GB "YR" or "YS" (we switched from one to the other, due to a problem) Raid Edition 2