Slow WDS PXE Clients and Bad Memory

The machines in question were all configured with 6144MB of RAM in the form of three 2GB DIMMs. What we didn’t notice at an early stage and why would you, was that some of the machines exclusively had three DIMMs of HP certified Micron memory in them however it transpires that our faulting machines had a combination of HP certified Micron memory and Hynix HP certified memory.