Report an Error

Intel Xeon Phi 3120A

Knights Corner
Graphics Processor
6144 MB
Memory Size
Memory Type
384 bit
Bus Width
Intel Xeon Phi 3120A Image Intel Knights Corner Image
The Xeon Phi 3120A is a high-end professional graphics card by Intel, launched in November 2012. Built on the 22 nm process, and based on the Knights Corner graphics processor, the card supports DirectX 11.1. The Knights Corner graphics processor is a large chip with a die area of 350 mm² and 5,000 million transistors. Unlike the fully unlocked Xeon Phi 7120P, which uses the same GPU but has all 244 shaders enabled, Intel has disabled some shading units on the Xeon Phi 3120A to reach the product's target shader count. It features 228 shading units, 57 texture mapping units and 57 ROPs. Intel has placed 6,144 MB GDDR5 memory on the card, which are connected using a 384-bit memory interface. The GPU is operating at a frequency of 1100 MHz, memory is running at 1250 MHz.
Being a dual-slot card, its power draw is rated at 300 W maximum. Xeon Phi 3120A is connected to the rest of the system using a PCIe 3.0 x16 interface. The card measures 248 mm in length, and features a dual-slot cooling solution. Its price at launch was 1,695 US Dollars.

Graphics Processor

GPU Name: Knights Corner
Process Size: 22 nm
Transistors: 5,000 million
Die Size: 350 mm²

Graphics Card

Released: Nov 12th, 2012
Production Status: Active
Launch Price: 1,695 USD
Bus Interface: PCIe 3.0 x16

Clock Speeds

GPU Clock: 1100 MHz
Memory Clock: 1250 MHz
5000 MHz effective


Memory Size: 6144 MB
Memory Type: GDDR5
Memory Bus: 384 bit
Bandwidth: 240.0 GB/s

Render Config

Shading Units: 228
TMUs: 57
ROPs: 57
Pixel Rate: 62.70 GPixel/s
Texture Rate: 62.70 GTexel/s
Floating-point performance: 501.6 GFLOPS

Board Design

Slot Width: Dual-slot
Length: 9.76 inches
248 mm
TDP: 300 W

Graphics Features

DirectX: 11.1
OpenGL: 4.3
OpenCL: 1.2
Shader Model: 5.0


Our review database contains 1 reviews of the Xeon Phi 3120A.

Card Notes

On November 15, 2011, Intel showed an early silicon version of a Knights Corner processor.

On June 5, 2012, Intel released open source software and documentation regarding Knights Corner.

In June 2012, Cray announced it would be offering 22nm 'Knight's Corner' chips (branded as 'Xeon Phi') as a co-processor in its 'Cascade' systems.