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Intel Xeon Phi 3120A

Graphics Processor
Knights Corner
Cores
228
TMUs
57
ROPs
57
Memory Size
6 GB
Memory Type
GDDR5
Bus Width
384 bit
The Xeon Phi 3120A was a enthusiast-class 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. This device has no display connectivity, as it is not designed to have monitors connected to it. Xeon Phi 3120A is connected to the rest of the system using a PCI-Express 3.0 x16 interface. The card measures 248 mm in length, and features a dual-slot cooling solution. Its price at launch was 1695 US Dollars.

Graphics Processor

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

Graphics Card

Release Date
Nov 12th, 2012
Generation
Knights Corner
(x100)
Production
End-of-life
Launch Price
1,695 USD
Bus Interface
PCIe 3.0 x16
Reviews
1 in our database

Clock Speeds

GPU Clock
1100 MHz
Memory Clock
1250 MHz
5000 MHz effective

Memory

Memory Size
6 GB
Memory Type
GDDR5
Memory Bus
384 bit
Bandwidth
240.0 GB/s

Render Config

Shading Units
228
TMUs
57
ROPs
57

Theoretical Performance

Pixel Rate
62.70 GPixel/s
Texture Rate
62.70 GTexel/s
FP32 (float) performance
501.6 GFLOPS

Board Design

Slot Width
Dual-slot
Length
9.76 inches
248 mm
TDP
300 W
Suggested PSU
700 W
Outputs
No outputs

Graphics Features

DirectX
11.1
OpenGL
4.3
OpenCL
1.2
Vulkan
N/A
Shader Model
5.0

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.