Intel's second-generation discrete 3D graphics Larrabee was first
announced at SIGGRAPH in 2008. Larrabee intends to build a stand-alone
GPU and GPGPU using the x86 instruction set. It was originally expected
that “Larrabee” will be launched in the third quarter of 2008 and
officially released in 2009, but in fact there were engineering samples
In June 2009, Intel claimed that the prototype of Larrabee was
comparable to the NVIDIA Geforce GTX 285. On November 4, 2009, Intel
officially announced that Larrabee will not be released as a consumer
GPU product. Instead, it will compete with Nvidia Tesla as a development
platform for graphics and high-performance computing.On May 31, 2010,
Intel completely canceled the Larrabee graphics card project.
Many years later, erek, Binary Nexus and others have conducted in-depth
research on Larrabee, especially the Larrabee chart compiled by Binary
Nexus seems to have become a complete Larrabee.The research on Larrabee
in this article is carried out from the perspective of collectors, which
is different from it. Please correct me in time if there are any
mistakes. The pictures and materials in this article are mainly from the
Internet and collectors’ collections, for which I am deeply grateful.
1.1 Chip evaluation board
1.1.1 early series
The Larrabee chip in the picture from ComputerBase.de is dated 0817
weeks, probably a mechanical sample.
The Larrabee chip collected by Genji不是根鸡 is dated 0902 weeks, and the
chip is marked "PRODUCT DETAILS". At this time, there is a corresponding
early Chip evaluation board package. It's a pity that this early Chip
evaluation board is a secret of Intel, or the real thing has been
1.1.2 Middle series
For the time being, only CHERRYPEAK CRB D2 FAB D, Rev 1 is available in
this series. Distinctive features: black PCB, no baffle, and no labels
such as "Engineering sample".
On April 9, 2009 (week 0915), at IDF spring 2009 in Beijing, Intel's Pat
Gelsinger demonstrated the Larrabee wafer, claiming that it worked in
Intel's lab. It also indirectly announced that LARRABEE is in the stage
of chip evaluation board.
The author's Larrabee is a black PCB, the PCB date is 0910 weeks, the
GPU date is 0919 weeks, the card number *114322*, Serial#IWCH92100017,
PCB#E47590-004. It is the earliest known chip evaluation board.
Larrabee from the AMD_Enthusiast collection, information unknown.
1.1.3 Late series
CHERRYPEAK CRB D2 FAB D, Rev 1. Blue PCB.
126.96.36.199 IDF fall 2009
On the afternoon of September 22, 2009, in the speech of Intel Executive
Vice President Sean Maloney, Intel demonstrated the actual running
effect of the Larrabee graphics card for the first time in history, but
only demonstrated a short demo rendering segment.
Although the actual Larrabee graphics card was not displayed, a corner
of the Larrabee graphics card in the demonstration machine on the booth
was secretly photographed. This part of the picture revealed three
pieces of information: the Larrabee graphics card is a blue PCB,
Serial#IWCH92600004 on the card, VCG Validation#03069394, Larrabee The
true appearance of the graphics card can naturally be found in this
On September 23, 2010, the prototype card released by ComputerBase.de
was the first time that the back of the Larrabee graphics card was shown
on the Internet. card number *114381*, Serial#IWCH92600017.
On November 25, 2017, the Larrabee graphics card was auctioned at EABY
for the first time, and was auctioned by Linus at a high price of
$3,000. PCB date is 2009 week, GPU date is 0923 week, card number
*114657*, Serial#IWCH92600186, VCG Validation#03064238.
188.8.131.52 Intel PDF
11 AUGUST 2010，Earlier this week, Intel VP Kirk Skaugen released a
PowerPoint slide detailing the rich history of Intel’s commitment to HPC
innovation, its progression from the Petascale age to the Exascale age
of supercomputing, and some hard specifications for its highly
parallelized MIC architecture aimed at enterprise markets.There is a
picture of Larrabee in the PowerPoint slides, which belongs to this
Although Larrabee's Chip evaluation board can only demonstrate a short
demo rendering segment, it has been verified that the GPU is basically
available. Thus entering the product finalization stage.
For the time being, only EMERALD PEAK CRB FAB B, Rev 1 is available in
this series. Obvious features: DVI interface moved from the center to
the top, blue PCB and Voltage regulators. Other information is unknown.
This Larrabee of Brutus is unique and it works. GPU Date 0943Weeks..
This series of Larrabee graphics cards is the most collected.
184.108.40.206 Rev 1
CHERRYPEAK CRB FAB E
220.127.116.11.1 ISC 2010
Kirk Skaugen, vice president and general manager of Intel's Data Center
Group holding the 'Knights Ferry' Intel Many Integrated Core (MIC)
architecture-based development card during his keynote at the
international Supercomputing Conference in Hamburg, Germany, May 31,
2010 . Skaugen announced plans to deliver new products based on the
Intel MIC architecture that will create platforms running at trillions
of calculations per second, while also retaining the benefits of
standard Intel processors.
On November 23, 2010, the front PCB image of Larrabee was first leaked
This Larrabee appears to be a Darthgrey collectible and could work.
November 2022, finderskeepers922 sold Larrabee on eBay at a price of
$8,200, which was terminated early, and the final transaction price is
unknown. Card number *116340*, GPU=E1, Serial#IWCH94700341, it works.
CHERRYPEAK CRB SJT1 FAB A
ZZC’s Larrabee has been removed the BIOS socket and chip, GPU=CO-E1,
card number *117983*, Serial#IWCH02000287.
PCB date of Slaventus' Larrabee graphics card is 1022 weeks (late May
2010), the GPU date is 1017 weeks, GPU=CO-E1, card number *119122*.
18.104.22.168.3 Captains Workspace
This Larrabee is from captains-workspace.com, there is no more
information about this card, it may be the owner's collection.
1.2.3 late series
Neither "Rev?" nor "LARRABEE GPU" is marked on the PCB. It is already a
Knights Ferry, but it can still be called a Larrabee graphics card with
a video signal output interface.
The Larrabee below, which sold for €4,650 ($5,234) on eBay France on
January 31, 2022, works.
Ferry, which has no video signal output interface, has transformed from
a LARRABEE GPU to a Xeon Phi Coprocessor.
This Knights Ferry of ZZC, the GPU date is 1037 weeks, GPU=EB, card
number *119524*, Serial#IWCH04000025.
The intel official label on the Knights Ferry of Binary Nexus is the
GPU=EO, card number *119222*
This silver-white Knights Ferry is called "Silver Wind". The picture
comes from deadbeef's post on linustechtips.com:
“KNC A1s are never intended to be videocards, I think the fact that you
have it with some video outputs may just indicate that those ones are
either refurbished ones with old PCBs or they just made it out of
I am unable to find my old pictures with real Larabee which as far as I
can remember could work only in text mode out-of-box, but I am pretty
sure they had black shrouds. Next gen has metal shrouds and then blue
ones. So, you are having almost production grade board, you can download
the drivers on official Intel site, but they are for calculations only.
Here are photos of KNF E0 which was the first add in card Intel admited
to be a co-processor, not a videocard They are taken in the early 2011.”
IDF 2011, Supermicro shows off a Larrabee box, the 6016GT-TF with Intel
MIC uses two (silver white) Knights Ferry compute cards. The blue
Knights Ferry will be introduced later.
（From semiaccurate.com ）
The Knights Ferry of 结城安穗YuuKiAnS has a big logo.
The GPU date is 1123 weeks, GPU=ED, card number *122928*,
SANTA CLARA, Calif. and HAMBURG, Germany, May 31, 2010 - During the
International Supercomputing Conference (ISC), Intel Corporation
announced plans to deliver new products based on the Intel Many
Integrated Core (MIC) architecture that will create platforms running at
trillions of calculations per second.
Targeting high-performance computing segments such as exploration,
scientific research and financial or climate simulation, the first
product, codenamed "Knights Corner," will be made on Intel's
22-nanometer manufacturing (nm) process – using transistor structures as
small as 22 billionths of a meter – and will use Moore's Law to scale to
more than 50 Intel processing cores on a single chip.
Industry design and development kits codenamed "Knights Ferry" are
currently shipping to select developers, and beginning in the second
half of 2010, Intel will expand the program to deliver an extensive
range of developer tools for Intel MIC architecture.
2.1 Chip evaluation board
Use Larrabee chip for pre-verification of Larrabee2 chip, such as GDDR5
memory support. Genji不是根鸡 has 4GB GDDR5 memory on this card, and 4GB
GDDR5 memory can be installed on the back. This Chip evaluation board
should be equipped with Larrabee2 chip test.
GPU date 1020Weeks, card number *120353*.
On November 15, 2011, Rajeeb Hazra, Intel's general manager of technical
computing, held up a Knights Corner chip at the SC11 conference in
Seattle and declared: "It's not a PowerPoint, it's a real chip."
On August 15, 2016, Tom Forsyth of the original Larrabee development
team revealed in "Why Didn't Larrabee Fail?":
Remember - KNC is literally the same chip as LRB2. It has texture
samplers and a video out port sitting on the die. They don't test them
or turn them on or expose them to software, but they're still there -
it's still a graphics-capable part.
The author is fortunate to have collected a Larrabee2 Graphics card,
which confirms what Tom Forsyth said is true.
The PCB date is 3611 weeks, the GPU date is 1147 weeks, and the card
number *124711*. Serial#IWCH14900041. 4GB GDDR5 memory, HYNIX
This Larrabee2 Graphics card is actually Knights Corner's Chip
evaluation board, which is equipped with a DVI interface. It couldn't be
displayed when I tested it on the computer. There are several sets of
jumpers on the board. I am afraid that only Tom Forsyth can make it a
Larrabee2 Graphics card.
Recognized by the system as a coprocessor (协处理器).
Larrabee1/2 Graphics card comparison:
2.1.3 late series
22.214.171.124 Intel Datasheet
The actual picture of the Knights Corner Chip evaluation board comes
from the illustration of the Intel Xeon Phi Coprocessor Datasheet, and
the card number in the picture is *125038*. 8GB GDDR5 memory.
2.2.1 Xeon Phi
Xeon Phi uses the same 22nm, 3-D tri-gate transistors as Ivy Bridge, and
comes as a PCIe card with more than 50 cores and at least 8GB of GDDR5
memory. It has 512b wide SIMD support – allowing for multiple elements
to be worked on in a single instruction – and Intel claims it's good for
more than 1 TeraFLOPs per node.
This article talks about Knights Ferry/Aubrey Isle/Larrabee1 and Knights
Corner/Xeon Phi/Larrabee2. As for Knights Landing, it has changed too
much and has moved away from Larrabee. This article ends with a few