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.
Xserve
On April 7, 2009 Xserve was updated to use Intel Xeon ('Gainestown') processors DDR3 memory, and NVIDIA graphics with Mini DisplayPort output. The update also saw an increase to the maximum storage capacity, bringing it to 6 TB when used with three 2 TB drives. An option to add a SSD boot-drive that does not occupy a drive bay was also implemented. The addition of the SSD boot drive allows all drives to be swapped whilst the server remains online. It is also Apple's first Xserve to use PVC-free internal cables and components and contain no brominated flame retardants.