Intel Brands Haswell GT3 "Iris," Desktop Variants Planned

With its 4th generation Core "Haswell" processors, Intel is putting in a serious effort to improve integrated graphics (IGP) performance to catch up with AMD's Radeon HD 8600 series on its latest APUs. There are three classes of Intel IGPs for Haswell, the GT1, which features 10 execution units (EUs), and will feature on entry-thru-mainstream Pentium, Core i3, and Core i5 chips; GT2, which features 20 EUs, featuring on mainstream-thru-performance Core i5 and Core i7 chips; and GT3, a large 40-EU IGP, which uses an L4 eDRAM cache. Chips with GT3 graphics are multi-chip modules (MCMs) of the CPU die and this eDRAM due, as detailed earlier. It was earlier believed that Haswell chips with GT3 graphics cores will be confined to notebook and Ultrabook-specific CPU models, but it turns out that it will make an appearance on the desktop platform as well.