| Type | LGA-ZIF |
|---|---|
| Chip form factors | Flip-chip |
| Contacts | 4,094 |
| FSB protocol | PCI Express,Infinity Fabric |
| Processor dimensions | 58.5mm x 75.4mm 4410.9 mm2 |
| Processors | Ryzen Threadripper: |
| Predecessor | TR4 |
| Variant | sWRX8 (SP3r4) |
| Successor | sTR5 |
| Memory support | DDR4 |
This article is part of theCPU socket series | |
Socket sTRX4, also known asSocket SP3r3,[1] is aland grid array (LGA)CPU socket designed byAMD supporting itsZen 2-based third-generationRyzen Threadripper desktop processors,[2] launched on November 25, 2019 for the high-end desktop and workstation platforms.
Socket sTRX4 is the direct successor toSocket 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 serverSocket SP3.[3][2]
While Socket SP3 doesn't require a chipset, instead utilizing asystem-on-a-chip design, Socket sTRX4 and its predecessor require a chipset to provide improved connectivity and functionality. For Socket sTRX4, theTRX40 chipset was developed, which provides a total of 88PCIe 4.0 lanes,[4] an increase from the 66PCIe 3.0 lanes on its predecessor platform.[5] Also it no longer features a built-inHigh 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]