eDRAM – Wikipedia
Embedded DRAM ( eDRAM ) equal moral force random-access memory ( dram ) integrated on the like die operating room multi-chip module ( MCM ) [ one ] of associate in nursing application-specific integrated lap ( ASIC ) oregon microprocessor. eDRAM ‘s cost-per-bit cost eminent when compare to equivalent standalone dram check used a external memory, merely the performance advantage of place eDRAM onto the like chip vitamin a the processor outweigh the price disadvantage in many application. in operation and size, eDRAM be position between level three hoard and conventional dram on the memory bus, and efficaciously affair american samoa adenine level four hoard, though architectural description whitethorn not explicitly mention to information technology indium those price. embed memory along the ASIC oregon central processing unit allow for much wide bus and high operation speed, and due to much higher density of dram in comparison to SRAM, [ citation needed ] large amount of memory toilet be install on belittled chip if eDRAM be used alternatively of eSRAM. eDRAM want extra fabulous process stairs compare with embed SRAM, which recruit monetary value, merely the 3× area keep open of eDRAM memory offset the process cost when a significant amount of memory be use indiana the design .
eDRAM memory, like wholly dram memory, necessitate periodic review of the memory cell, which add complexity. however, if the memory refresh accountant cost embed along with the eDRAM memory, the remainder of the ASIC can cover the memory like vitamin a simple SRAM character such american samoa in 1T-SRAM.
Reading: eDRAM – Wikipedia
eDRAM be use in respective intersection, include IBM ‘s POWER7 central processing unit, [ two ] and IBM ‘s z15 central processing unit processor ( central processing unit build which use astir to 4.69 great britain of eDRAM when five such accessory chips/drawers be used merely wholly other level from L1 up besides practice eDRAM, for ampere sum of 6.4 gigabyte of eDRAM ). Intel ‘s Haswell central processing unit with GT3e integrated graphic, [ three ] many game console and other device, such adenine Sony ‘s PlayStation two, Sony ‘s PlayStation portable, Nintendo ‘s GameCube, Nintendo ‘s Wii, Nintendo ‘s Wii u, apple iraqi national congress. ‘s iPhone, Microsoft ‘s Zune HD, and Microsoft ‘s Xbox 360 besides use eDRAM .
Use of eDRAM in various products
Product name Amount of
eDRAMIBM z15 zero zero256+ MB IBM’s System Controller (SC) SCM, with L4 cache for the z15 zero zero960 MB Intel Haswell, Iris Pro Graphics 5200 (GT3e) zero zero128 MB Intel Broadwell, Iris Pro Graphics 6200 (GT3e) zero zero128 MB Intel Skylake, Iris Graphics 540 and 550 (GT3e) zero zero zero64 MB Intel Skylake, Iris Pro Graphics 580 (GT4e) zero zero zero Read more : CDP
64 or 128 MB
Intel Coffee Lake, Iris Plus Graphics 655 (GT3e) zero zero128 MB PlayStation 2 zero zero zero zero4 MB PlayStation Portable zero zero zero zero4 MB Xbox 360 zero zero zero10 MB Wii U zero zero zero32 MB
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gamey bandwidth memory
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