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'''Loihi 2''' (pronounced low-ee-hee 2) is the successor to {{\\|Loihi}}, a second-generation neuromorphic research test chip designed by Intel Labs that was introduced in late 2021. The chip uses an asynchronous spiking neural network (SNN) to implement adaptive self-modifying event-driven fine-grained parallel computations used to implement learning and inference with high efficiency. The chip is a 128-neuromorphic cores many-core IC fabricated on [[Intel 4]] process and features a unique programmable microcode learning engine for on-chip SNN training.
 
'''Loihi 2''' (pronounced low-ee-hee 2) is the successor to {{\\|Loihi}}, a second-generation neuromorphic research test chip designed by Intel Labs that was introduced in late 2021. The chip uses an asynchronous spiking neural network (SNN) to implement adaptive self-modifying event-driven fine-grained parallel computations used to implement learning and inference with high efficiency. The chip is a 128-neuromorphic cores many-core IC fabricated on [[Intel 4]] process and features a unique programmable microcode learning engine for on-chip SNN training.
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== Overview ==
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Introduced in September 2021, Loihi 2 is the successor to {{\\|Loihi}}, a neuromorphic research test chip. Like its predecessor, {{\\|Loihi}}, Loihi 2 consists of an asynchronous spiking neural network (SNN) meaning instead of manipulating signals, the chip sends spikes along activate synapses. Connections are asynchronous and highly timed-based. Neuromorphic cores containing many neurons are interlinked and receive spikes from elsewhere in the network. When received spikes accumulate for a certain period of time and reach a set threshold, the core will fire off its own spikes to its connected neurons. Preceding spikes reinforce each other and the neuron connections while spikes that follow will inhibit the connection, declining the connectivity until all activities are halted.
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Loihi 2 is fabricated on pre-production [[Intel 4 process]] and has a total of 1,000,000 artificial neurons and 120 million synapses. In addition to the 128 neuromorphic cores, there are 6 managing Lakemont cores.
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=== Key changes from {{\\|Loihi}} ===
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* [[Intel 14 nm]] -> [[Intel 4 process]]
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* 1.10x transistors
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* 0.9x synapse (120,000,000, down from 130,000,000)
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* 7.7x neurons (1,000,000, up from 130,000)
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* 2x microprocessor count (6, up from 3)
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* 3D mesh scaling (from 2D)
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* 32-bit integer payload (from binary)
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* Rich programmable neuron cores
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* 3-factor learning
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* Faster circuits
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* new interfaces
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** gigabit ethernet
  
 
== Die ==
 
== Die ==

Revision as of 02:11, 1 October 2021

Edit Values
Loihi 2
General Info
DesignerIntel
ManufacturerIntel
MarketArtificial Intelligence
IntroductionSeptember 30, 2021 (announced)
September 30, 2021 (launched)
ShopAmazon
Neuromorphic Specs
Neurons1,000,000
Synapses120,000,000
Microarchitecture
ProcessIntel 4
Transistors2,300,000,000
TechnologyCMOS
Die31 mm²
Multiprocessing
Max SMP16,384-Way (Multiprocessor)
Vcore0.50 V-1.25 V
Succession

Loihi 2 (pronounced low-ee-hee 2) is the successor to Loihi, a second-generation neuromorphic research test chip designed by Intel Labs that was introduced in late 2021. The chip uses an asynchronous spiking neural network (SNN) to implement adaptive self-modifying event-driven fine-grained parallel computations used to implement learning and inference with high efficiency. The chip is a 128-neuromorphic cores many-core IC fabricated on Intel 4 process and features a unique programmable microcode learning engine for on-chip SNN training.

Overview

Introduced in September 2021, Loihi 2 is the successor to Loihi, a neuromorphic research test chip. Like its predecessor, Loihi, Loihi 2 consists of an asynchronous spiking neural network (SNN) meaning instead of manipulating signals, the chip sends spikes along activate synapses. Connections are asynchronous and highly timed-based. Neuromorphic cores containing many neurons are interlinked and receive spikes from elsewhere in the network. When received spikes accumulate for a certain period of time and reach a set threshold, the core will fire off its own spikes to its connected neurons. Preceding spikes reinforce each other and the neuron connections while spikes that follow will inhibit the connection, declining the connectivity until all activities are halted.

Loihi 2 is fabricated on pre-production Intel 4 process and has a total of 1,000,000 artificial neurons and 120 million synapses. In addition to the 128 neuromorphic cores, there are 6 managing Lakemont cores.

Key changes from Loihi

  • Intel 14 nm -> Intel 4 process
  • 1.10x transistors
  • 0.9x synapse (120,000,000, down from 130,000,000)
  • 7.7x neurons (1,000,000, up from 130,000)
  • 2x microprocessor count (6, up from 3)
  • 3D mesh scaling (from 2D)
  • 32-bit integer payload (from binary)
  • Rich programmable neuron cores
  • 3-factor learning
  • Faster circuits
  • new interfaces
    • gigabit ethernet

Die

  • Intel 4 process
  • 2,300,000,000 transistors
    • 128 neuromorphic cores + 6 x86 cores
  • 31 mm² die size
    • Core area 0.21 mm²


intel loihi 2 die shot.png

Bibliography

  • Some information was obtained directly from Intel

See also

Retrieved from "https://en.wikichip.org/w/index.php?title=intel/loihi_2&oldid=99353"
Facts about "Loihi 2 - Intel"
RDF feed
core voltage (max)1.25 V (12.5 dV, 125 cV, 1,250 mV) +
core voltage (min)0.5 V (5 dV, 50 cV, 500 mV) +
designerIntel +
die area31 mm² (0.0481 in², 0.31 cm², 31,000,000 µm²) +
first announcedSeptember 30, 2021 +
first launchedSeptember 30, 2021 +
full page nameintel/loihi 2 +
instance ofneuromorphic chip +
ldateSeptember 30, 2021 +
manufacturerIntel +
market segmentArtificial Intelligence +
max cpu count16,384 +
nameLoihi 2 +
neuron count1,000,000 +
smp max ways16,384 +
synapse count120,000,000 +
technologyCMOS +
transistor count2,300,000,000 +