Socket sTRX4

Socket sTRX4
TypeLGA-ZIF
Chip form factorsFlip-chip
Contacts4,094
FSB protocolPCI Express, Infinity Fabric
Processor dimensions58.5mm x 75.4mm
4410.9 mm2
ProcessorsRyzen Threadripper:
PredecessorTR4
VariantsWRX8 (SP3r4)
SuccessorsTR5
Memory supportDDR4
This article is part of the CPU socket series

Socket sTRX4, also known as Socket SP3r3,[1] is a land grid array (LGA) CPU socket designed by AMD supporting its Zen 2-based third-generation Ryzen Threadripper desktop processors,[2] 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.[3][2]

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,[4] an increase from the 66 PCIe 3.0 lanes on its predecessor platform.[5] 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.[6] AMD promised long-term support for socket sTRX4.[7] 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.[8]

  1. ^ Liu, Zhiye (October 16, 2019). "AMD Lists Threadripper 3000 CPU With 32 Cores, Possible New Socket". Tom's Hardware. Retrieved November 28, 2019.
  2. ^ a b Cutress, Ian; Frumusanu, Andrei; Bonshor, Gavin (November 25, 2019). "The AMD Threadripper 3960X and 3970X Review: 24 and 32 Cores on 7nm". AnandTech. Retrieved November 28, 2019.
  3. ^ Cutress, Ian (August 10, 2017). "The AMD Ryzen Threadripper 1950X and 1920X Review: CPUs on Steroids". AnandTech. Retrieved August 10, 2017.
  4. ^ "AMD TRX40 Motherboards for 3rd Gen AMD Ryzen™ Threadripper™". AMD. Retrieved November 28, 2019.
  5. ^ "AMD SocketTR4 X399 Platform-based Motherboards". AMD. Retrieved December 6, 2018.
  6. ^ Bonshor, Gavin (November 28, 2019). "The AMD TRX40 Motherboard Overview: 12 New Motherboards Analyzed". AnandTech. Retrieved November 16, 2022.
  7. ^ Jeffrey, Cal (November 12, 2019). "AMD commits to 'long-term' support for sTRX4 CPU socket used with third-gen Threadripper". TechSpot. Retrieved November 16, 2022.
  8. ^ Crider, Michael (June 30, 2022). "AMD's Pro-only Threadripper shift leaves HEDT enthusiasts out in the cold". PCWorld. Retrieved April 25, 2023.