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ThunderX2 CN9978 - Cavium
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ThunderX2 CN9978
General Info
DesignerCavium
ManufacturerTSMC
Model NumberCN9978
Part NumberCN9978-2300LG4077-Y21-G,
CN9978-2200LG4077-Y21-G,
CN9978-2100LG4077-Y21-G,
CN9978-2000LG4077-Y21-G,
CN9978-1800LG4077-Y21-G
MarketServer
IntroductionMay 7, 2018 (announced)
May 7, 2018 (launched)
General Specs
FamilyThunderX2
Frequency1,800 MHz, 2,000 MHz, 2,100 MHz, 2,200 MHz, 2,300 MHz
Microarchitecture
ISAARMv8.1 (ARM)
MicroarchitectureVulcan
Process16 nm
TechnologyCMOS
Word Size64 bit
Cores30
Threads120
Max CPUs2 (Multiprocessor)
Max Memory2 TiB
Packaging
PackageFCLGA-4077 (LGA)
Contacts4077

ThunderX2 CN9978 is a 64-bit triaconta-core high-performance ARM server microprocessor introduced by Cavium in mid-2018. The microprocessor, which is based on the Vulcan microarchitecture, is fabricated on TSMC's 16 nm process. Depending on the exact SKU, the CN9978 operates between 1.8 GHz and 2.3 GHz and supports up to quad/octa-channel DDR4-2666 memory.

Cache[edit]

Main article: Vulcan § Cache

[Edit/Modify Cache Info]

hierarchy icon.svg
Cache Organization
Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory.

The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC.

Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies.

Note: All units are in kibibytes and mebibytes.
L1$1.87 MiB
1,914.88 KiB
1,960,837.12 B
0.00183 GiB
L1I$960 KiB
0.938 MiB
983,040 B
9.155273e-4 GiB
30x32 KiB8-way set associative 
L1D$960 KiB
0.938 MiB
983,040 B
9.155273e-4 GiB
30x32 KiB8-way set associative 

L2$7.5 MiB
7,680 KiB
7,864,320 B
0.00732 GiB
  30x256 KiB8-way set associative 

L3$30 MiB
30,720 KiB
31,457,280 B
0.0293 GiB
  30x1 MiB  

Memory controller[edit]

[Edit/Modify Memory Info]

ram icons.svg
Integrated Memory Controller
Max TypeDDR4-2666
Supports ECCYes
Max Mem2 TiB
Controllers2
Channels8
Max Bandwidth158.95 GiB/s
Bandwidth
Single 19.87 GiB/s
Double 39.74 GiB/s
Quad 79.47 GiB/s
Hexa 119.21 GiB/s
Octa 158.95 GiB/s

Expansions[edit]

[Edit/Modify Expansions Info]

ide icon.svg
Expansion Options
PCIeRevision: 3.0
Max Lanes: 56
Configuration: x16, x8, x4, x1
SATARevision: 3
Max Ports: 2
USBRevision: 3
Max Ports: 2


Features[edit]

[Edit/Modify Supported Features]

Cog-icon-grey.svg
Supported ARM Extensions & Processor Features
NEONAdvanced SIMD extension
TrustZoneTrustZone Security Extensions
PMUv3ARMv8 PMUv3 Performance Monitors Extension
CRC32CRC-32 checksum Extension
CryptoCryptographic Extension
FPFloating-point Extension
SIMDAdvanced SIMD extension
Has subobject
"Has subobject" is a predefined property representing a container construct and is provided by Semantic MediaWiki.
ThunderX2 CN9978 - Cavium#pcie +
base frequency1,800 MHz (1.8 GHz, 1,800,000 kHz) +, 2,000 MHz (2 GHz, 2,000,000 kHz) +, 2,100 MHz (2.1 GHz, 2,100,000 kHz) +, 2,200 MHz (2.2 GHz, 2,200,000 kHz) + and 2,300 MHz (2.3 GHz, 2,300,000 kHz) +
core count30 +
designerCavium +
familyThunderX2 +
first announcedMay 7, 2018 +
first launchedMay 7, 2018 +
full page namecavium/thunderx2/cn9978 +
has ecc memory supporttrue +
instance ofmicroprocessor +
isaARMv8.1 +
isa familyARM +
l1$ size1.87 MiB (1,914.88 KiB, 1,960,837.12 B, 0.00183 GiB) +
l1d$ description8-way set associative +
l1d$ size0.938 MiB (960 KiB, 983,040 B, 9.155273e-4 GiB) +
l1i$ description8-way set associative +
l1i$ size0.938 MiB (960 KiB, 983,040 B, 9.155273e-4 GiB) +
l2$ description8-way set associative +
l2$ size7.5 MiB (7,680 KiB, 7,864,320 B, 0.00732 GiB) +
l3$ size30 MiB (30,720 KiB, 31,457,280 B, 0.0293 GiB) +
ldateMay 7, 2018 +
manufacturerTSMC +
market segmentServer +
max cpu count2 +
max memory2,097,152 MiB (2,147,483,648 KiB, 2,199,023,255,552 B, 2,048 GiB, 2 TiB) +
max memory channels8 +
max sata ports2 +
max usb ports2 +
microarchitectureVulcan +
model numberCN9978 +
nameThunderX2 CN9978 +
packageFCLGA-4077 +
part numberCN9978-2300LG4077-Y21-G +, CN9978-2200LG4077-Y21-G +, CN9978-2100LG4077-Y21-G +, CN9978-2000LG4077-Y21-G + and CN9978-1800LG4077-Y21-G +
process16 nm (0.016 μm, 1.6e-5 mm) +
supported memory typeDDR4-2666 +
technologyCMOS +
thread count120 +
word size64 bit (8 octets, 16 nibbles) +