Socket TR4
{{Short description|CPU socket for HEDT AMD CPUs}}
{{Use American English|date=November 2022}}
{{Use mdy dates|date=November 2022}}
{{CPU socket
| name = Socket TR4
| image = 250px
| formfactors = Flip-chip
| contacts = 4094
| protocol = PCI Express, Infinity Fabric
| fsb =
| voltage =
| dimensions = 58.5mm x 75.4mm
4410.9 mm2
| processors = Ryzen Threadripper:{{Plainlist|
:* Whitehaven
:* Colfax}}
| predecessor =
| successor = sTRX4
| memory = DDR4
}}
Socket TR4, also known as Socket SP3r2, is a zero insertion force land grid array (LGA) CPU socket designed by AMD supporting its first- and second-generation Zen-based Ryzen Threadripper desktop processors,{{Cite web |last=Ung |first=Gordon |date=May 30, 2017 |title=AMD's 'TR4' Threadripper CPU socket is gigantic |url=http://www.pcworld.com/article/3198924/computers/amds-tr4-threadripper-cpu-socket-is-gigantic.html |website=PCWorld |language=en-US |access-date=November 16, 2022}}{{Cite web |title=CoolerMaster Wraith Ripper CPU cooler for Threadripper |url=http://www.coolermaster.com/cooling/cpu-air-cooler/wraith-ripper/ |website=Cooler Master |language=en-US |access-date=November 16, 2022}} launched on August 10, 2017{{cite web |last=Cutress |first=Ian |date=August 10, 2017 |title=The AMD Ryzen Threadripper 1950X and 1920X Review: CPUs on Steroids |url=http://www.anandtech.com/show/11697/the-amd-ryzen-threadripper-1950x-and-1920x-review |website=AnandTech |language=en-US |access-date=August 10, 2017}} for the high-end desktop and workstation platforms. It was succeeded by Socket sTRX4 for the third generation of Ryzen Threadripper processors.
TR4 is AMD's second LGA socket for a consumer product after the short lived Socket 1207 FX.{{Cite news |last=Shimpi |first=Anand Lal |date=November 30, 2006 |title=AMD's Quad FX: Technically Quad Core |url=https://www.anandtech.com/show/2125/3 |website=AnandTech |language=en-US |access-date=August 13, 2018}}{{cite news |last1=Hruska |first1=Joel |date=August 1, 2017 |title=MSI Shows How to Install AMD's Threadripper CPU |url=https://www.extremetech.com/computing/253408-watch-msi-install-amds-new-threadripper-cpu |website=ExtremeTech |language=en-US |access-date=August 10, 2017}} It is physically identical to, but electrically incompatible with both AMD's server Socket SP3, and TR4's successor, Socket sTRX4.{{cite web |last=Cutress |first=Ian |date=November 7, 2019 |title=3rd Gen Ryzen Threadripper, Up to 32-Cores - AMD Q4: 16-core Ryzen 9 3950X, Threadripper Up To 32-Core 3970X, Coming November 25th |url=https://www.anandtech.com/show/15062/amds-2019-fall-update/3 |website=AnandTech |language=en-US |access-date=November 28, 2019}}
While the SP3 server socket does not require a chipset, instead utilizing a system-on-a-chip design, TR4 and its successor HEDT sockets require a chipset to unlock the features of the CPU. For TR4, the AMD X399 chipset was released, which allows a total of 64 PCIe 3.0 lanes for quad SLI/CrossFire configurations.{{Cite web |title=AMD SocketTR4 X399 Platform-based Motherboards |url=https://www.amd.com/en/products/str4-platform |website=AMD |language=en-US |access-date=December 6, 2018}}
The socket is made by both Foxconn and Lotes.{{cite news |last=Terkelsen |first=Jacob |date=November 22, 2017 |title=MSI X399 Gaming Pro Carbon AC Motherboard Review |url=https://www.tomshardware.com/uk/reviews/msi-x399-gaming-pro-carbon-ac-threadripper-motherboard,5307.html |work=Tom's Hardware |language=en-US |access-date=December 10, 2019 }}