Socket S1

Socket S1 is the CPU socket type used by AMD for their Turion 64, Athlon 64 Mobile, Phenom II Mobile and later Sempron processors, which debuted with the dual-core Turion 64 X2 CPUs on May 17, 2006.

Socket S1
FSB frequencyup to 800 MHz HyperTransport
Voltage range?
ProcessorsAthlon 64 X2; Turion 64 X2; Mobile Sempron; Turion 64 (MK series only)
PredecessorSocket 563
SuccessorSocket FS1

This article is part of the CPU socket series

Technical specificationsEdit

AMD Athlon II P320 with Socket S1 layout

Socket S1 is a 638 pin, low profile, ZIF, 1.27mm pitch socket.[1] It replaces the existing Socket 754 in the mobile computing segment (e.g. laptops).

Socket S1 CPUs can include support for dual-channel DDR2 SDRAM, dual-core mobile CPUs, and virtualization technology, and compete with the mobile Intel Core 2 processor series.[2]

Socket S1 revisionsEdit

Different generations of processors used variant pinouts of the S1 socket; processors were not necessarily compatible with a socket even if they fit mechanically.

  • Socket S1g1 or just S1
    • Platforms: Kite and Kite Refresh
    • CPUs: K8 core, HyperTransport 1.0, DDR2 memory
  • Socket S1g2
    • Platforms: Puma and Yukon
    • CPUs: K8 Revision G core, HyperTransport 3.0, DDR2 memory
    • Added:
      • Split-power planes and linked power management support
      • Support for possible low voltage processors
  • Socket S1g3
    • Platforms: Tigris
    • CPUs: K10.5 core, HyperTransport 3.0, DDR2 memory
  • Socket S1g4
    • Platforms: Danube
    • CPUs: K10.5 core, HyperTransport 3.0, DDR3 memory

See alsoEdit


  1. ^ "Low-Profile Socket S1 Design Specification" (PDF). Retrieved 2009-05-03. CS1 maint: discouraged parameter (link)
  2. ^ "AMD Turion 64 X2 Dual-Core Mobile Technology Competitive Comparison". Retrieved 2009-05-03. CS1 maint: discouraged parameter (link)

External linksEdit