• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Intel Demonstrates First Fully Integrated Optical IO Chiplet

btarunr

Editor & Senior Moderator
Staff member
Joined
Oct 9, 2007
Messages
47,216 (7.55/day)
Location
Hyderabad, India
System Name RBMK-1000
Processor AMD Ryzen 7 5700G
Motherboard ASUS ROG Strix B450-E Gaming
Cooling DeepCool Gammax L240 V2
Memory 2x 8GB G.Skill Sniper X
Video Card(s) Palit GeForce RTX 2080 SUPER GameRock
Storage Western Digital Black NVMe 512GB
Display(s) BenQ 1440p 60 Hz 27-inch
Case Corsair Carbide 100R
Audio Device(s) ASUS SupremeFX S1220A
Power Supply Cooler Master MWE Gold 650W
Mouse ASUS ROG Strix Impact
Keyboard Gamdias Hermes E2
Software Windows 11 Pro
Intel Corporation has achieved a revolutionary milestone in integrated photonics technology for high-speed data transmission. At the Optical Fiber Communication Conference (OFC) 2024, Intel's Integrated Photonics Solutions (IPS) Group demonstrated the industry's most advanced and first-ever fully integrated optical compute interconnect (OCI) chiplet co-packaged with an Intel CPU and running live data. Intel's OCI chiplet represents a leap forward in high-bandwidth interconnect by enabling co-packaged optical input/output (I/O) in emerging AI infrastructure for data centers and high performance computing (HPC) applications.

"The ever-increasing movement of data from server to server is straining the capabilities of today's data center infrastructure, and current solutions are rapidly approaching the practical limits of electrical I/O performance. However, Intel's groundbreaking achievement empowers customers to seamlessly integrate co-packaged silicon photonics interconnect solutions into next-generation compute systems. Our OCI chiplet boosts bandwidth, reduces power consumption and increases reach, enabling ML workload acceleration that promises to revolutionize high-performance AI infrastructure," said Thomas Liljeberg, senior director, Product Management and Strategy, Integrated Photonics Solutions (IPS) Group.



This first OCI chiplet is designed to support 64 channels of 32 gigabits per second (Gbps) data transmission in each direction on up to 100 meters of fiber optics and is expected to address AI infrastructure's growing demands for higher bandwidth, lower power consumption and longer reach. It enables future scalability of CPU/GPU cluster connectivity and novel compute architectures, including coherent memory expansion and resource disaggregation.

AI-based applications are increasingly deployed globally, and recent developments in large language models (LLM) and generative AI are accelerating that trend. Larger and more efficient machine learning (ML) models will play a key role in addressing the emerging requirements of AI acceleration workloads. The need to scale future computing platforms for AI is driving exponential growth in I/O bandwidth and longer reach to support larger processing unit (CPU/GPU/IPU) clusters and architectures with more efficient resource utilization, such as xPU disaggregation and memory pooling.

Electrical I/O (i.e., copper trace connectivity) supports high bandwidth density and low power, but only offers short reaches of about one meter or less. Pluggable optical transceiver modules used in data centers and early AI clusters can increase reach at cost and power levels that are not sustainable with the scaling requirements of AI workloads. A co-packaged xPU optical I/O solution can support higher bandwidths with improved power efficiency, low latency and longer reach - exactly what AI/ML infrastructure scaling requires.

As an analogy, replacing electrical I/O with optical I/O in CPUs and GPUs to transfer data is like going from using horse carriages to distribute goods, limited in capacity and range, to using cars and trucks that can deliver much larger quantities of goods over much longer distances. This level of improved performance and energy cost is what optical I/O solutions like Intel's OCI chiplet emerging bring to AI scaling.

The fully Integrated OCI chiplet leverages Intel's field-proven silicon photonics technology and integrates a silicon photonics integrated circuit (PIC), which includes on-chip lasers and optical amplifiers, with an electrical IC. The OCI chiplet demonstrated at OFC was co-packaged with an Intel CPU but can also be integrated with next-generation CPUs, GPUs, IPUs and other system-on-chips (SoCs).

This first OCI implementation supports up to 4 terabits per second (Tbps) bidirectional data transfer, compatible with peripheral component interconnect express (PCIe) Gen5. The live optical link demonstration showcases a transmitter (Tx) and receiver (Rx) connection between two CPU platforms over a single-mode fiber (SMF) patch cord. The CPUs generated and measured the optical Bit Error Rate (BER), and the demo showcases the Tx optical spectrum with 8 wavelengths at 200 gigahertz (GHz) spacing on a single fiber, along with a 32 Gbps Tx eye diagram illustrating strong signal quality.

The current chiplet supports 64 channels of 32 Gbps data in each direction up to 100 meters (though practical applications may be limited to tens of meters due to time-of-flight latency), utilizing eight fiber pairs, each carrying eight dense wavelength division multiplexing (DWDM) wavelengths. The co-packaged solution is also remarkably energy efficient, consuming only 5 pico-Joules (pJ) per bit compared to pluggable optical transceiver modules at about 15 pJ/bit. This level of hyperefficiency is critical for data centers and high-performance computing environments and could help address AI's unsustainable power requirements.

As a market leader in silicon photonics, Intel leverages more than 25 years of internal research from Intel Labs, which pioneered integrated photonics. Intel was the first company to develop and ship silicon photonics-based connectivity products with industry-leading reliability at high volume to major cloud service providers.

Intel's main differentiator is unparalleled integration using hybrid laser-on-wafer technology and direct integration, which yield higher reliability and lower costs. This unique approach enables Intel to deliver superior performance while maintaining efficiency. Intel's robust, high-volume platform boasts shipping over 8 million PICs with over 32 million integrated on-chip lasers, showing a laser failures-in-time (FIT) rate of less than 0.1, a widely utilized measure of reliability that represents failure rates and how many failures occur.

These PICs were packaged in pluggable transceiver modules, deployed in large data center networks at major hyperscale cloud service providers for 100, 200, and 400 Gbps applications. Next generation, 200G/lane PICs to support emerging 800 Gbps and 1.6 Tbps applications are under development.

Intel is also implementing a new silicon photonics fab process node with state-of-the-art (SOA) device performance, higher density, better coupling and vastly improved economics. Intel continues to make advancements in on-chip laser and SOA performance, cost (greater than 40% die area reduction) and power (greater than 15% reduction).

Intel's current OCI chiplet is a prototype. Intel is working with select customers to co-package OCI with their SOCs as an optical I/O solution.

Intel's OCI chiplet represents a leap forward in high-speed data transmission. As the AI infrastructure landscape evolves, Intel remains at the forefront, driving innovation and shaping the future of connectivity.

View at TechPowerUp Main Site
 
Joined
Oct 22, 2014
Messages
14,078 (3.82/day)
Location
Sunshine Coast
System Name H7 Flow 2024
Processor AMD 5800X3D
Motherboard Asus X570 Tough Gaming
Cooling Custom liquid
Memory 32 GB DDR4
Video Card(s) Intel ARC A750
Storage Crucial P5 Plus 2TB.
Display(s) AOC 24" Freesync 1m.s. 75Hz
Mouse Lenovo
Keyboard Eweadn Mechanical
Software W11 Pro 64 bit
Skynet will be pleased.
 
Joined
May 3, 2019
Messages
2,075 (1.02/day)
System Name BigRed
Processor I7 12700k
Motherboard Asus Rog Strix z690-A WiFi D4
Cooling Noctua D15S chromax black/MX6
Memory TEAM GROUP 32GB DDR4 4000C16 B die
Video Card(s) MSI RTX 3080 Gaming Trio X 10GB
Storage M.2 drives WD SN850X 1TB 4x4 BOOT/WD SN850X 4TB 4x4 STEAM/USB3 4TB OTHER
Display(s) Dell s3422dwg 34" 3440x1440p 144hz ultrawide
Case Corsair 7000D
Audio Device(s) Logitech Z5450/KEF uniQ speakers/Bowers and Wilkins P7 Headphones
Power Supply Corsair RM850x 80% gold
Mouse Logitech G604 lightspeed wireless
Keyboard Logitech G915 TKL lightspeed wireless
Software Windows 10 Pro X64
Benchmark Scores Who cares
Pretty cool, but it's Intel so let the hating begin.
 
Joined
Sep 1, 2020
Messages
2,338 (1.52/day)
Location
Bulgaria
Those speeds, I don't know why they don't impress me? Do press releases always try to push the biggest numbers and why? For example, the sum of the theoretical maximum speeds in both directions.
 
Joined
Apr 16, 2010
Messages
3,600 (0.68/day)
Location
Portugal
System Name LenovoⓇ ThinkPad™ T430
Processor IntelⓇ Core™ i5-3210M processor (2 cores, 2.50GHz, 3MB cache), Intel Turbo Boost™ 2.0 (3.10GHz), HT™
Motherboard Lenovo 2344 (Mobile Intel QM77 Express Chipset)
Cooling Single-pipe heatsink + Delta fan
Memory 2x 8GB KingstonⓇ HyperX™ Impact 2133MHz DDR3L SO-DIMM
Video Card(s) Intel HD Graphics™ 4000 (GPU clk: 1100MHz, vRAM clk: 1066MHz)
Storage SamsungⓇ 860 EVO mSATA (250GB) + 850 EVO (500GB) SATA
Display(s) 14.0" (355mm) HD (1366x768) color, anti-glare, LED backlight, 200 nits, 16:9 aspect ratio, 300:1 co
Case ThinkPad Roll Cage (one-piece magnesium frame)
Audio Device(s) HD Audio, RealtekⓇ ALC3202 codec, DolbyⓇ Advanced Audio™ v2 / stereo speakers, 1W x 2
Power Supply ThinkPad 65W AC Adapter + ThinkPad Battery 70++ (9-cell)
Mouse TrackPointⓇ pointing device + UltraNav™, wide touchpad below keyboard + ThinkLight™
Keyboard 6-row, 84-key, ThinkVantage button, spill-resistant, multimedia Fn keys, LED backlight (PT Layout)
Software MicrosoftⓇ WindowsⓇ 10 x86-64 (22H2)
For example, the sum of the theoretical maximum speeds in both directions.
You just described Wi-Fi router marketing shenanigans precisely.
 
Joined
Jan 3, 2021
Messages
3,477 (2.46/day)
Location
Slovenia
Processor i5-6600K
Motherboard Asus Z170A
Cooling some cheap Cooler Master Hyper 103 or similar
Memory 16GB DDR4-2400
Video Card(s) IGP
Storage Samsung 850 EVO 250GB
Display(s) 2x Oldell 24" 1920x1200
Case Bitfenix Nova white windowless non-mesh
Audio Device(s) E-mu 1212m PCI
Power Supply Seasonic G-360
Mouse Logitech Marble trackball, never had a mouse
Keyboard Key Tronic KT2000, no Win key because 1994
Software Oldwin
So when tiles get good enough, they become chiplets?
 
Joined
May 22, 2024
Messages
409 (2.25/day)
System Name Kuro
Processor AMD Ryzen 7 7800X3D@65W
Motherboard MSI MAG B650 Tomahawk WiFi
Cooling Thermalright Phantom Spirit 120 EVO
Memory Corsair DDR5 6000C30 2x48GB (Hynix M)@6000 30-36-36-76 1.36V
Video Card(s) PNY XLR8 RTX 4070 Ti SUPER 16G@200W
Storage Crucial T500 2TB + WD Blue 8TB
Case Lian Li LANCOOL 216
Power Supply MSI MPG A850G
Software Ubuntu 24.04 LTS + Windows 10 Home Build 19045
Benchmark Scores 17761 C23 Multi@65W
I think I remember reading about the concept in...Scientific American?... some 20 year ago. Now it shows up in a commercial prototype. Faster than fusion, at least. :p

Doubt it would be seen in consumer hardware for another couple decades, if ever. But one can dream.
 
Joined
Jun 1, 2010
Messages
375 (0.07/day)
System Name Very old, but all I've got ®
Processor So old, you don't wanna know... Really!
So basically 64 lanes of PCIe 5.0 bandwidth over 100 meters? That’s pretty good. But we will never see in on desktops within the next 10 years
More like, never. This is for data center/enterprise, where the speed and performance matters absolutely, as there can be no compromise. Also, for the price these fancy stuff has, the only buyers it can have are the ultra reach corporations. Consumers cannot get this. It's like buying quarry megatruck for garden/back yard activities.
On the other hand desktops designed to be flawed, for the consumers upgrade them more frequently with lesser benefits. Just look how PCIE lanes in chipsets being artificially crippled. At the same time HEDT motherboards having not much higher price tags, with much bigger feature set.
 
Last edited:
Joined
May 5, 2016
Messages
98 (0.03/day)
Those speeds, I don't know why they don't impress me? Do press releases always try to push the biggest numbers and why? For example, the sum of the theoretical maximum speeds in both directions.
The big numbers combined with excellent energy efficiency matters to the datacenter folks this would appeal to. This press release isn't in the realm of consumer gear at this point, though many of the datacenter advancements trickle down eventually to the consumer.
 
Joined
Jan 3, 2021
Messages
3,477 (2.46/day)
Location
Slovenia
Processor i5-6600K
Motherboard Asus Z170A
Cooling some cheap Cooler Master Hyper 103 or similar
Memory 16GB DDR4-2400
Video Card(s) IGP
Storage Samsung 850 EVO 250GB
Display(s) 2x Oldell 24" 1920x1200
Case Bitfenix Nova white windowless non-mesh
Audio Device(s) E-mu 1212m PCI
Power Supply Seasonic G-360
Mouse Logitech Marble trackball, never had a mouse
Keyboard Key Tronic KT2000, no Win key because 1994
Software Oldwin
It's like buying quarry megatruck for garden/back yard activities.
No, it's more like buying a fast train, along with tracks, stations, power substation and tunnels, and have everything installed in your back yard... so you can have a fast train.
 
Top