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{{chip | {{chip | ||
|chip type=neuromorphic chip | |chip type=neuromorphic chip | ||
+ | |no image=yes | ||
|name=Loihi 2 | |name=Loihi 2 | ||
− | |||
|designer=Intel | |designer=Intel | ||
|manufacturer=Intel | |manufacturer=Intel | ||
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|predecessor=Loihi | |predecessor=Loihi | ||
|predecessor link=intel/loihi | |predecessor link=intel/loihi | ||
− | |neuron count=1, | + | |neuron count=1,000,000 |
|synapse count=120,000,000 | |synapse count=120,000,000 | ||
}} | }} | ||
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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. | 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, | + | 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}} === | === Key changes from {{\\|Loihi}} === | ||
* [[Intel 14 nm]] -> [[Intel 4 process]] | * [[Intel 14 nm]] -> [[Intel 4 process]] | ||
* 1.10x transistors | * 1.10x transistors | ||
− | * 0.9x | + | * 0.9x synapse (120,000,000, down from 130,000,000) |
− | * 7.7x neurons (1, | + | * 7.7x neurons (1,000,000, up from 130,000) |
− | |||
* 2x microprocessor count (6, up from 3) | * 2x microprocessor count (6, up from 3) | ||
* 3D mesh scaling (from 2D) | * 3D mesh scaling (from 2D) | ||
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! Oheo Gulch !! Kapoho Point | ! Oheo Gulch !! Kapoho Point | ||
|- | |- | ||
− | | | + | | Ethernet card || 4" x 4" Ethernet |
|- | |- | ||
| 1 Chip || 8 Chips | | 1 Chip || 8 Chips | ||
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| 120,000,000 Synapses || 960,000,000 Synapses | | 120,000,000 Synapses || 960,000,000 Synapses | ||
|- | |- | ||
− | | 1, | + | | 1,000,000 Neurons || 8,000,000 Neurons |
|} | |} | ||
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=== Kapoho Point (8 chip, 8M neurons) === | === Kapoho Point (8 chip, 8M neurons) === | ||
− | '''Kapoho Point''' a 4-inch by 4-inch form factor board featuring eight Loihi 2 chips arranged in a 2-stacked (double-sided PCB) 4x4 chips. With eight Loihi 2 chips, Kapoho Point incorporates 1,024 neuromorphic cores with 960 | + | '''Kapoho Point''' a 4-inch by 4-inch form factor board featuring eight Loihi 2 chips arranged in a 2-stacked (double-sided PCB) 4x4 chips. With eight Loihi 2 chips, Kapoho Point incorporates 1,024 neuromorphic cores with 960,000 synapses and 8 million neurons. |
[[File:intel Kapoho Point board.jpg|600px]] | [[File:intel Kapoho Point board.jpg|600px]] | ||
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− | : [[File:intel loihi 2 die shot.png|class=wikichip_ogimage| | + | : [[File:intel loihi 2 die shot.png|class=wikichip_ogimage|500px]] |
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Facts about "Loihi 2 - Intel"
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) + |
designer | Intel + |
die area | 31 mm² (0.0481 in², 0.31 cm², 31,000,000 µm²) + |
first announced | September 30, 2021 + |
first launched | September 30, 2021 + |
full page name | intel/loihi 2 + |
instance of | neuromorphic chip + |
ldate | September 30, 2021 + |
main image | + |
manufacturer | Intel + |
market segment | Artificial Intelligence + |
max cpu count | 16,384 + |
name | Loihi 2 + |
neuron count | 1,048,576 + |
smp max ways | 16,384 + |
synapse count | 120,000,000 + |
technology | CMOS + |
transistor count | 2,300,000,000 + |