Jaydaw76 wrote:
Can you run unbuffered RAM in the xw6400?
The xw6400 and xw6600 use Fully Buffered DIMMs (FB-DIMM). This technology has an advanced memory buffer (AMB) which serializes the memory signals on the DIMM's memory chips and sends the data as a serial stream(s) to the system. FB-DIMMs are very different than unbuffered RAM or Registered DIMMs (also commonly called buffered DIMMs) used on later systems.
FB-DIMMs were used only on the xw6400, xw6600, xw8400, and xw8600. The unbuffered and registered memory used in later systems is incompatible, and keyed (notched) differently, so they cannot be installed in the xw6400.