Using its eDRAM technology, Intel built a discrete 128 Mbyte L4 cache chip with a 100 microsecond retention time at a worst case 95 degrees C. It will fit in a Haswell package linking to the CPU die via a 100 Gbyte/second point-to-point link, adding about 3W to the component.
The technology reaches “part of the design space you can’t hit with commodity DRAM,” such as GDDR-5 chips that would offer half the bandwidth and consume more power, said David Kanter, microprocessor analyst for Real World Tech.
OEMs including Apple are expected to use in their top-end notebooks the Haswell eDRAM module at about 45W to save space and power while sacrificing little performance. It will replace a combo of discrete graphics chips dissipating about 40W and existing processors drawing 30W.
Intel integrated graphics to get eDRAM
Posted on Tuesday, June 18 2013 @ 13:21 CEST by Thomas De Maesschalck