GeForce GTX 660M Mac Edition and Radeon HD 2900 PRO - video card comparison

GeForce GTX 660M Mac Edition

Radeon HD 2900 PRO

Architecture

Kepler (2012−2018)

TeraScale (2005−2013)

GPU code name

GK107

R600

Market segment

Desktop

Release date

April 2013

December 2007

Interface

MXM-B (3.0)

PCIe 1.0 x16

Supplementary power connectors

None

1x 8-pin

Core clock speed

950 MHz

600 MHz

Floating-point performance

729.6 gflops

384.0 gflops

Manufacturing process technology

28 nm

80 nm

Number of transistors

1,270 million

720 million

Pipelines / CUDA cores

384

320

Power consumption (TDP)

50 Watt

200 Watt

Texture fill rate

30.40

9.600

Memory type

GDDR5

GDDR3

Maximum RAM amount

512 MB

Memory bus width

128 Bit

256 Bit

Memory clock speed

5000 MHz

1600 MHz

Memory bandwidth

80 GB/s

51.2 GB/s

Display Connectors

No outputs

2x DVI, 1x S-Video

DirectX

12 (11_0)

10.0 (10_0)

CUDA

3.0

OpenCL

1.2

N/A

OpenGL

4.6

3.3

Shader Model

5.1

4.0

Vulkan

1.1.126

N/A