Socket TR4

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,^[1][2] launched on August 10, 2017^[3] for the high-end desktop and workstation platforms. It was succeeded by Socket sTRX4 for the third generation of Ryzen Threadripper processors.

Socket TR4

Type	LGA-ZIF
Chip form factors	Flip-chip
Contacts	4094
FSB protocol	PCI Express, Infinity Fabric
Processor dimensions	58.5mm x 75.4mm 4410.9 mm2
Processors	Ryzen Threadripper: Whitehaven Colfax
Successor	sTRX4
Memory support	DDR4
This article is part of the CPU socket series

TR4 is AMD's second LGA socket for a consumer product after the short lived Socket 1207 FX.^[4][5] It is physically identical to, but electrically incompatible with both AMD's server Socket SP3, and TR4's successor, Socket sTRX4.^[3][6]

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.^[7]

The socket is made by both Foxconn and Lotes.^[8]

See also

• Ryzen
• Zen (microarchitecture)
• Socket AM4
• Socket SP3
• Socket sTRX4