32GB Kit (8x4GB) DDR2 Fully Buffered PC2-6400 800MHz (DDR2-800) FB-DIMM Memory for 2008 Apple Mac Pro (Apple P/N MB194G/A x4) at Amazon.com
Infineon Boosts DDR2 FB-DIMM Deployment: Designs and Manufactures All Key Components for Industry's Next-Generation Server Memory Modules; Delivers AMB-Chip to FB-DIMM Manufacturers - Infineon Technologies
FB-DIMM riser A | Blake Patterson | Flickr
Amazon.com: OWC 16GB (4 x 4GB) PC6400 DDR2 ECC 800MHz FB-DIMMs Memory Compatible with Mac Pro Quad Core / 8 Core (OWC64FB4MPK16GB) : Everything Else