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Socket SP3

Type	LGA
Contacts	4094
Voltage range	1.3V (Threadripper), 1.8V (EPYC)
Processor dimensions	58.5 x 75.4 = 4410.9 mm² (6.84 in², 44.109 cm²)
Processors	Epyc: Naples Rome Milan
Predecessor	Socket C32, Socket G34
Successor	Socket SP5
Memory support	ECC DDR4
This article is part of the CPU socket series

Socket SP3 is a land grid array CPU socket designed by AMD supporting its Zen- and Zen 2-based Epyc server processors, launched on June 20, 2017. Because the socket is the same size as Socket TR4, and Socket TRX4, users can use CPU coolers designed for not only those sockets, but CPU coolers designed for sTR4 and sTRX4.

Socket SP3 is a system on a chip 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.

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 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 third and fifth generation Ryzen Threadripper Pro 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

• Zen (microarchitecture)
• Zen 2
• Socket AM4

References

1. "AMD's 'TR4' Threadripper CPU socket is gigantic".
2. "Noctua showcase EPYC/Threadripper Ready TR4/SP3 ready CPU coolers".
3. "Home>CPUs AMD CPU Updates: 16 Core ThreadRipper w/64 PCIe Lanes This Summer, Epyc Launching June 20th".
4. Cutress, Ian (2017-08-10). "The AMD Ryzen Threadripper 1950X and 1920X Review: CPUs on Steroids". AnandTech. Retrieved 2017-08-10.
5. der8auer (28 January 2018). "EPYC in ASUS ZENITH EXTREME? (en)" (video). YouTube.{{cite web}}: CS1 maint: numeric names: authors list (link)
6. Cutress, Ian; Frumusanu, Andrei; Bonshor, Gavin (2019-11-25). "The AMD Threadripper 3960X and 3970X Review: 24 and 32 Cores on 7nm". AnandTech. Retrieved 2019-11-28.
7. Bonshor, Gavin. "AMD Opens Up Threadripper Pro: Three New WRX80 Motherboards". www.anandtech.com. Retrieved 2021-07-08.

• Advanced Micro Devices server sockets