Intel today announced discontinuation of all Xeon 3500- and 3600- series processors for one-way workstations. Xeon 3500 series was built on Nehalem microarchitecture, had up to 4 cores, and supported Hyper-Threading and Turbo Boost technologies. Xeon 36xx microprocessors used Westmere (enhanced Nehalem) architecture, and they added 2 CPU cores, larger L3 cache and support for AES instructions. Both series are three or four generations older than Xeon E3-1200 v3 products, expected to launch in Q2 2013, therefore it's not surprising to see them retired.
Full list of End-Of-Lifed SKUs was provided in several Product Change Notifications, that were published today. Xeon W3520, W3530, W3540, W3550, W3565, W3570, W3580, W3670, W3680 and W3690 boxed and tray parts can be ordered until September 27 of this year. Tray/OEM CPUs will be shipped until September 5, 2014, and the boxed products will be shipped while supplies last. When Xeon 3500 and 3600 CPUs are gone, Intel will still have three generations of Xeon E3 products available on the market.