GeForce GTX 660 OEM and Radeon Pro 555X - video card comparison

GeForce GTX 660 OEM

Radeon Pro 555X

Architecture

Kepler (2012−2018)

Polaris (2016−2019)

GPU code name

GK104

Polaris 21

Market segment

Desktop

Mobile workstation

Release date

August 2012

June 2017

Interface

PCIe 3.0 x16

PCIe 3.0 x8

Supplementary power connectors

1x 6-pin

None

Boost clock speed

888 MHz

Core clock speed

823 MHz

855 MHz

Floating-point performance

2,046 gflops

Manufacturing process technology

28 nm

14 nm

Number of transistors

3,540 million

3,000 million

Pipelines / CUDA cores

1152

768

Power consumption (TDP)

130 Watt

Texture fill rate

85.25

43.54

Memory type

GDDR5

Maximum RAM amount

2 GB

4 GB

Memory bus width

256 Bit

128 Bit

Memory clock speed

5600 MHz

5080 MHz

Memory bandwidth

179.2 GB/s

81.6 GB/s

Shared memory

Display Connectors

2x DVI, 1x HDMI, 1x DisplayPort

No outputs

HDMI

DirectX

12 (11_0)

12 (12_0)

CUDA

3.0

OpenCL

1.2

2.0

OpenGL

4.6

Shader Model

5.1

6.4

Vulkan

1.1.126

1.2.131

FreeSync