Socket Geek

Socket G34 socket: CPUs, chipsets and cooler fit

Socket G34 is the AMD land grid server socket for multi-chip module Opteron 6000 processors. It carries 1974 contacts while the CPU package seats 1944 lands. AMD launched the socket in March 2010 with Magny-Cours, followed by Interlagos, Abu Dhabi and finally Warsaw in January 2014. Boards scale to four sockets with dual die packages.

Quick facts

MakerAMD
Package typeLGA
Contacts1,974
Package sizen/a
IntroducedMarch 2010
StatusLegacy
MemoryDDR3-1600 ECC, four channels
PCIe from the CPUHyperTransport 3.1 links; PCIe Gen 2 from the SR5600 series chipset
Cooler mounting holesBoard specific (server heatsink)
ReplacesSocket F
Replaced bySocket SP3

Overview

The socket exists for dense integer servers where core count beats per core speed. Two Piledriver dies per package reach 12 and 16 cores with 16 MB of L3 cache at 99 W on Warsaw P parts. Four DDR3 channels with ECC feed each socket. HyperTransport 3.1 links connect the on package dies and tie sockets together, while PCIe Gen 2 slots hang off the SR5600 series chipset.

Because the platform spans four processor generations, firmware must list the exact stepping. Warsaw P parts validate to 2S and 4S clouds with 99 W cooling. Successor SP3 replaced the platform in 2017 with single die EPYC parts that never fit here.

The Warsaw refresh cut flagship power from 115 W and 140 W to 99 W for large cloud deployments, with about 27 percent better performance per watt than older 6300 parts.

Processor generations

CodenameMarketing nameYearsNotes
Magny-CoursOpteron 6100 series2010 to 2011Dual die K10 MCM parts with 8 and 12 cores and 12 MB of L3 cache, launched in March 2010 on Socket G34 for 2S and 4S servers, including the 140 W 6180 SE.
WarsawOpteron 6300P series2014Piledriver based 12 and 16 core parts at 99 W with 16 MB of L3 cache, launched in January 2014 for efficient 2S and 4S clouds.
InterlagosOpteron 6200 series2011 to 2012Bulldozer based 4 to 16 core MCM parts with 8 MB of L3 cache per die, launched in November 2011, including the 6230 HE through 6284 SE.
Abu DhabiOpteron 6300 series2012Piledriver based 4 to 16 core MCM parts with 8 MB of L3 cache per die, launched in November 2012, including the 6308 through 6376.

Chipsets for Socket G34

SR5600 series

Server chipsets for dual die Opteron 6000 processors with DDR3 ECC.

ChipsetSegmentNotes
SR5690WorkstationFlagship 4S chipset with IOMMU and HyperTransport 3 links.
SR5670Workstation
SR5650Workstation

Who Socket G34 serves

Socket G34 fits private cloud and virtualization clusters where threads per dollar decide the build. Twelve and sixteen core Warsaw parts at 99 W consolidate guests with low power per thread. Supermicro and Sugon shipped 2S and 4S nodes for large deployments.

Within the socket the choice is core count against clocks at fixed 99 W. The 6338P runs 12 cores at 2.3 GHz to 2.8 GHz while the 6370P runs 16 cores at 2.0 GHz to 2.5 GHz. Both share DDR3 ECC memory and the same chipsets, so density decides.

Memory and PCIe

Memory support is DDR3-1600 ECC over four channels per socket with registered DIMMs for large counts. Two channels feed each on package die. Even populations across sockets protect NUMA fairness for guests.

PCIe Gen 2 slots come from the SR5650, SR5670 and SR5690 chipsets rather than the CPU. HyperTransport links at up to 3.2 GHz carry die to die and socket to socket traffic. A 10 GbE fabric suits cluster links more than local accelerators.

CPUs on Socket G34

28 processor pages in the database, newest first.

ProcessorCores / threadsBase / boostTDPLaunched
AMD Opteron 6338P12 / 122.3 / 2.8 GHz99 WJan 2014
AMD Opteron 6370P16 / 162.0 / 2.5 GHz99 WJan 2014
AMD Opteron 63084 / 43.5 GHz115 WNov 2012
AMD Opteron 63208 / 82.8 / 3.3 GHz115 WNov 2012
AMD Opteron 63288 / 83.2 / 3.8 GHz115 WNov 2012
AMD Opteron 634412 / 122.6 / 3.2 GHz115 WNov 2012
AMD Opteron 634812 / 122.8 / 3.4 GHz115 WNov 2012
AMD Opteron 6366 HE16 / 161.8 / 3.1 GHz85 WNov 2012
AMD Opteron 637616 / 162.3 / 3.2 GHz115 WNov 2012
AMD Opteron 637816 / 162.4 / 3.3 GHz115 WNov 2012
AMD Opteron 638016 / 162.5 / 3.4 GHz115 WNov 2012
AMD Opteron 6386 SE16 / 162.8 / 3.5 GHz140 WNov 2012
AMD Opteron 6230 HE12 / 122.2 / 3.1 GHz85 WMay 2012
AMD Opteron 627816 / 162.4 / 3.3 GHz115 WMay 2012
AMD Opteron 628116 / 162.5 / 3.2 GHz130 WMay 2012
AMD Opteron 6284 SE16 / 162.7 / 3.4 GHz140 WMay 2012
AMD Opteron 62044 / 43.3 GHz115 WNov 2011
AMD Opteron 62128 / 82.6 / 3.2 GHz115 WNov 2011
AMD Opteron 62208 / 83.0 / 3.6 GHz115 WNov 2011
AMD Opteron 623412 / 122.4 / 3.0 GHz115 WNov 2011
AMD Opteron 623812 / 122.6 / 3.2 GHz115 WNov 2011
AMD Opteron 6262 HE16 / 161.6 / 2.9 GHz85 WNov 2011
AMD Opteron 627216 / 162.1 / 3.0 GHz115 WNov 2011
AMD Opteron 627416 / 162.2 / 3.1 GHz115 WNov 2011
AMD Opteron 627616 / 162.3 / 3.2 GHz115 WNov 2011
AMD Opteron 6282 SE16 / 162.6 / 3.3 GHz140 WNov 2011
AMD Opteron 6180 SE12 / 122.5 GHz140 WFeb 2011
AMD Opteron 616812 / 121.9 GHz115 WMar 2010

Frequently asked questions

Which processors fit Socket G34?

Opteron 6000 series server parts including Magny-Cours, Interlagos, Abu Dhabi and Warsaw generations. EPYC needs SP3 and desktop FX parts need AM3+. The platforms never interchange.

Why do sources list both 1974 and 1944 contacts?

The CPU package carries 1944 lands while the socket holds 1974 contacts. The extra socket positions key the package and carry no signal on Warsaw parts.

What memory does Socket G34 use?

DDR3-1600 ECC over four channels per socket. Registered DIMMs allow large populations for virtualization hosts. Balance DIMMs across all sockets for NUMA fairness.

How many PCIe lanes does Socket G34 provide?

No PCIe lanes come from the CPU. HyperTransport 3.1 links tie the two on package dies and connect sockets, while PCIe Gen 2 slots hang off the SR5600 series chipset.

Sources and verification

  1. Socket G34 (Wikipedia)
  2. AMD Opteron 6338P Specs (TechPowerUp)
  3. AMD introduces two new low power Opteron 6300 processors (PC Perspective)

Facts last checked against these sources on . Page last edited on .