socket sTRX4
{{Short description|CPU socket for HEDT AMD CPUs}}
{{Use American English|date=November 2022}}
{{Use mdy dates|date=November 2022}}
{{CPU socket
| name = Socket sTRX4
| image =
| formfactors = Flip-chip
| contacts = 4,094
| protocol = PCI Express, Infinity Fabric
| fsb =
| voltage =
| dimensions = 58.5mm x 75.4mm
4410.9 mm2
| processors = Ryzen Threadripper:{{Plainlist|
:* Castle Peak}}
| predecessor = TR4
| variant = sWRX8 (SP3r4)
| successor = sTR5
| memory = DDR4
}}
Socket sTRX4, also known as Socket SP3r3,{{cite web |last=Liu |first=Zhiye |date=October 16, 2019 |title=AMD Lists Threadripper 3000 CPU With 32 Cores, Possible New Socket |url=https://www.tomshardware.com/uk/news/threadripper-3000-cpu-listed-with-32-cores-possible-new-socket |website=Tom's Hardware |language=en-US |access-date=November 28, 2019}} is a land grid array (LGA) CPU socket designed by AMD supporting its Zen 2-based third-generation Ryzen Threadripper desktop processors,{{Cite web |last1=Cutress |first1=Ian |last2=Frumusanu |first2=Andrei |last3=Bonshor |first3=Gavin |date=November 25, 2019 |title=The AMD Threadripper 3960X and 3970X Review: 24 and 32 Cores on 7nm |url=https://www.anandtech.com/show/15044/the-amd-ryzen-threadripper-3960x-and-3970x-review-24-and-32-cores-on-7nm |website=AnandTech |language=en-US |access-date=November 28, 2019}} launched on November 25, 2019 for the high-end desktop and workstation platforms.
Socket sTRX4 is the direct successor to Socket TR4 used in the first- and second-generation Ryzen Threadripper products. It is physically identical to, but electrically incompatible with, both TR4 and AMD's server Socket SP3.{{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}}
While Socket SP3 doesn't require a chipset, instead utilizing a system-on-a-chip design, Socket sTRX4 and its predecessor require a chipset to provide improved connectivity and functionality. For Socket sTRX4, the TRX40 chipset was developed, which provides a total of 88 PCIe 4.0 lanes,{{cite web |title=AMD TRX40 Motherboards for 3rd Gen AMD Ryzen™ Threadripper™ |url=https://www.amd.com/en/chipsets/str40 |website=AMD |language=en-US |access-date=November 28, 2019}} an increase from the 66 PCIe 3.0 lanes on its predecessor platform.{{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}} Also it no longer features a built-in High Definition Audio interface; instead motherboard manufacturers are including a separate audio controller onboard to provide audio functionality.{{Cite web |last=Bonshor |first=Gavin |date=November 28, 2019 |title=The AMD TRX40 Motherboard Overview: 12 New Motherboards Analyzed |url=https://www.anandtech.com/show/15121/the-amd-trx40-motherboard-overview- |website=AnandTech |language=en-US |access-date=November 16, 2022}} AMD promised long-term support for socket sTRX4.{{Cite web |last=Jeffrey |first=Cal |date=November 12, 2019 |title=AMD commits to 'long-term' support for sTRX4 CPU socket used with third-gen Threadripper |url=https://www.techspot.com/news/82734-amd-commits-long-term-support-strx4-cpu-socket.html |website=TechSpot |language=en-US |access-date=November 16, 2022}} Despite this, AMD only gave it one generation of CPUs before pausing the regular Ryzen Threadripper lineup (the only product to ever use sTRX4) and producing only the Threadripper Pro CPUs on socket sWRX8.{{cite magazine |last1=Crider |first1=Michael |title=AMD's Pro-only Threadripper shift leaves HEDT enthusiasts out in the cold |url=https://www.pcworld.com/article/798483/amds-pro-only-threadripper-pricing-leaves-consumers-out-in-the-cold.html |magazine=PCWorld |access-date=25 April 2023 |language=en |date=30 June 2022}}