configurations differing in the number of cores, L3 cache and GPU execution units. Ivy Bridge–based Xeon processors Intel Ivy Bridge–based Xeon microprocessors (also known as Ivy Bridge-E) is the follow-up to Sandy Bridge-E, using the same CPU core as the Ivy Bridge processor, but in LGA 2011, LGA 1356 and LGA 2011-1 packages for workstations and servers. Additional high-end server processors based on the Ivy Bridge architecture, code named Ivytown, were announced September 10, 2013 at the Intel Developer Forum, after the usual one year interval between consumer and server product releases. The Ivy Bridge-EP processor line announced in September 2013 has up to 12 cores and 30 MB third level cache, with rumors of Ivy Bridge-EX up to 15 cores and an increased third level cache of up to 37.5 MB, although an early leaked lineup of Ivy Bridge-E included processors with a maximum of 6 cores. Both Core-i7 and Xeon versions are produced: the Xeon versions marketed as Xeon E5-1400 V2 act as drop-in replacements for the existing Sandy Bridge-EN based Xeon E5, Xeon E5-2600 V2 versions act as drop-in replacements for the existing Sandy Bridge-EP based Xeon E5, while Core-i7 versions designated i7-4820K, i7-4930K and i7-4960X were released on September 10, 2013, remaining compatible with the X79 and LGA 2011 hardware. For the intermediate LGA 1356 socket, Intel launched the Xeon E5-2400 V2 (codenamed Ivy Bridge-EN) series in January 2014. These have up to 10 cores. A new Ivy Bridge-EX line marketed as Xeon E7 V2 had no corresponding predecessor using the Sandy Bridge microarchitecture but instead followed the older Westmere-EX processors. List of Ivy Bridge processors Processors featuring Intel's HD 4000 graphics (or HD P4000 for Xeon) are set in bold. Other processors feature HD 2500 graphics or HD Graphics unless indicated by N/A. Desktop processors List of announced desktop processors, as follows: <li> Requires a compatible motherboard. Suffixes to denote: K Unlocked (adjustable CPU multiplier up to 63 times) S Performance-optimized lifestyle (low power with 65 W TDP) T Power-optimized lifestyle (ultra-low power consumption with 35–45 W TDP) P No on-die video chipset X Extreme performance (adjustable CPU ratio with no ratio limit) Server processors Mobile processors Suffixes to denote: M Mobile processor Q Quad-core U Ultra-low power X Extreme performance (adjustable CPU ratio with no ratio limit) Y Extreme ultra-low power Roadmap Intel demonstrated the Haswell architecture in September 2011, which began release in