Xeon
Introduced in May 2013, Xeon E3-12xx v3 is the first Xeon series based on the Haswell microarchitecture. It uses the new LGA 1150 socket, which was introduced with the desktop Core i5/i7 Haswell processors, incompatible with the LGA 1155 that was used in Xeon E3 and E3 v2. As before, the main difference between the desktop and server versions is added support for ECC memory in the Xeon-branded parts. The main benefit of the new microarchitecture is better power efficiency.
AmigaOne X1000
The specifications from A-EON Technology's website:The 'Xena' coprocessor is an XMOS XCore MCU integrated on the X1000 motherboard and connected a non-standard expansion slot, called the 'Xorro' slot, named after the Zorro bus used in the Commodore Amiga. However, it uses a PCI-express like connector, using a custom I/O layout. 
The XMOS processor is connected to the local CPU bus in addition to the Xorro slot, allowing timing critical custom hardware to be controlled by the I/O optimized XCore without loading the main processor.