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Socket SP3

Type	LGA-ZIF
Chip form factors	Flip-chip
Contacts	4094
FSB protocol	PCI Express, Infinity Fabric
Voltage range	1.8V (Threadripper) 1.3V (EPYC)
Processor dimensions	58.5mm x 75.4mm 4410.9 mm
Processors	Epyc: Naples Rome Milan
Predecessor	Socket C32 Socket G34
Successor	Socket SP5 Socket SP6
Memory support	ECC DDR4
This article is part of the CPU socket series

Socket SP3 is a zero insertion force land grid array CPU socket designed by AMD supporting its Zen-, Zen 2- and Zen 3-based Epyc server processors, launched on June 20, 2017. Because the socket is the same size as socket TR4 and socket sTRX4, users can use CPU coolers not only designed for SP3, but also coolers designed for TR4 and sTRX4.

Socket SP3 is a system in a package socket - that means most features required to make the system fully functional (such as memory, PCI Express, SATA controllers etc.) are fully integrated into the processor, eliminating the need for a chipset to be placed on a motherboard. Variants for desktop platforms (as said below) are, eventually, requiring additional chipset to provide improved functionality of the system. A processor using socket SP3 is mounted by inserting the CPU into a slide and fixing the slide assembly by tightening three screws using the torque wrenches normally provided alongside the motherboard. Automated processor mounting tools in OEMs do not use the slide, instead relying upon the precision movement of the robot arm.

Socket SP3r2

Socket TR4, also known as Socket SP3r2, is used for high-end desktop CPUs. It is physically identical to a normal SP3 socket with some connections disabled. A TR4 socket will prevent the use of CPUs designed for Socket SP3 with an ID pin.

Socket SP3r3

Socket sTRX4, also known as Socket SP3r3, used for third-generation Ryzen Threadripper (Threadripper 3000X) high-end desktop CPUs, is physically identical to the normal SP3 socket with some connections disabled, and is the successor to Socket TR4 (SP3r2).

Socket SP3r4

Socket sWRX8, also known as Socket SP3r4, is used for second and third generation Ryzen Threadripper Pro (Ryzen Threadripper Pro 3000WX and Ryzen Threadripper Pro 5000WX) high-end desktop CPUs, is physically identical to the normal SP3 socket, with some connections repurposed, and is the successor to Socket sTRX4 (SP3r3).

See also

• Socket AM4, contemporary desktop socket from AMD
• Socket P, contemporary server socket from Intel

References

1. Ung, Gordon (May 30, 2017). "AMD's 'TR4' Threadripper CPU socket is gigantic". PCWorld. Retrieved November 16, 2022.
2. Campbell, Mark (May 29, 2017). "Noctua showcase EPYC/Threadripper Ready TR4/SP3 ready CPU coolers". Overclock3D. Retrieved November 16, 2022.
3. Smith, Ryan (May 30, 2017). "Home>CPUs AMD CPU Updates: 16 Core ThreadRipper w/64 PCIe Lanes This Summer, Epyc Launching June 20th". AnandTech. Retrieved November 16, 2022.
4. Cutress, Ian (August 10, 2017). "The AMD Ryzen Threadripper 1950X and 1920X Review: CPUs on Steroids". AnandTech. Retrieved August 10, 2017.
5. der8auer (January 28, 2018). "EPYC in ASUS ZENITH EXTREME? (en)" (video). YouTube. Retrieved November 16, 2022.{{cite web}}: CS1 maint: numeric names: authors list (link)
6. 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.
7. Bonshor, Gavin (January 12, 2021). "AMD Opens Up Threadripper Pro: Three New WRX80 Motherboards". AnandTech. Retrieved July 8, 2021.

• AMD server sockets