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However, Intel then doubles the result because the unidirectional send and receive link pair can be simultaneously active. Thus, Intel describes a 20-lane QPI link pair (send and receive) with a 3.2 GHz clock as having a data rate of 25.6 GB/s. A clock rate of 2.4 GHz yields a data rate of 19.2 GB/s.
The Intel Ultra Path Interconnect (UPI) [1] [2] is a scalable processor interconnect developed by Intel which replaced the Intel QuickPath Interconnect (QPI) in Xeon Skylake-SP platforms starting in 2017.
AnandTech tested the Intel QuickPath Interconnect (4.8 GT/s version) and found the copy bandwidth using triple-channel 1,066 MHz DDR3 was 12.0 GB/s. A 3.0 GHz Core 2 Quad system using dual-channel 1066 MHz DDR3 achieved 6.9 GB/s. [15] Maximum PC has discovered that Intel has unlocked the QPI clock and memory multipliers on retail 920s and 940s.
Intel QuickPath Interconnect (QPI) is expected to be updated to version 1.1, enabling seamless scaling beyond eight-socket systems. Maximum supported memory speeds are expected to be DDR3-1600 and DDR4-1866.
according to the Intel paper listed as a reference, QPI is a 5-layer interconnect, which is what the article says. If you have better references to Intel docs, please update the article. If you do not wish to update the article, feel free to just put the info here and someone else can update the article. Please identify any problems in detail.
In contrast, Uncore functions include QPI controllers, L3 cache, snoop agent pipeline, on-die memory controller, on-die PCI Express Root Complex, and Thunderbolt controller. [3] Other bus controllers such as SPI and LPC are part of the chipset. [4] The Intel uncore design stems from its origin as the northbridge. The design of the Intel uncore ...
Intel’s PC and AI woes have left it as a potential takeover target, which is where Qualcomm and Apollo enter the mix. Qualcomm, according to the Wall Street Journal, wants to buy up Intel ...
Virtual legacy wires (VLW) are transactions over the Intel QuickPath Interconnect and Intel Ultra Path Interconnect interconnect fabrics that replace a particular set of physical legacy pins on Intel microprocessors. The legacy wires replaced include the INTR, A20M, and SMI legacy signals.