2.1.2 Middle series

2.1.2.1 Knights Corner chip

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."

2.1.2.2 Larrabee2 Graphics card

In February 2022, the Larrabee Graphics card was auctioned on EBAY, and it was reported by many websites, which shows its high popularity. At the end of October, another Larrabee Graphics card was auctioned at a high price on ebay. Although the collection value of Larrabee Graphics card is close to 3Dfx Voodoo5 6000, the research on Larrabee Graphics card is still not deep enough. The author took advantage of the heat and started to improve the chapter about Larrabee Graphics card in "History of Intel Graphics card". On November 25th, when searching for information on the Internet, I found a black XEON PHi with DVI interface on taobao.com, and bought it for 5,000 RMB. The research found that it turned out to be the Larrabee2 Graphics card that no one mentioned.

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's Larrabee2 Graphics card 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 H5GQ2H24MFR.

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

2.1.3.1 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 Produt evaluation board

2.2.1 Xeon Phi Coprocessor

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.

3120 6GB

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 pictures.

Related Links:History of Intel graphics card (Final version)