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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.
It contains a significant amount of data which contradicts the Intel docs on QPI; the rest of the data seem to be flat-out fabricated. For example, QPI is not a 4 layer interconnect. --unsigned according to the Intel paper listed as a reference, QPI is a 5-layer interconnect, which is what the article says.
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 ...
The Intel X58 (codenamed Tylersburg) is an Intel chip designed to connect Intel processors with Intel QuickPath Interconnect (QPI) interface to peripheral devices. Supported processors implement the Nehalem microarchitecture and therefore have an integrated memory controller (IMC), so the X58 does not have a memory interface.
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.
Connecticut is set to pay nearly $5.9 million to the family of a disabled man who was wrongly imprisoned in his 1992 murder conviction before he was freed in 2015.
QuickPath Interconnect (QPI) by Intel (though this is an off-chip interface, not on-chip bus) virtual share from PICC - free and open source; TileLink - Free and open bus architecture from CHIPS Alliance [6]