Radeon HD 6950M and GeForce GT 645M - video card comparison

Radeon HD 6950M

GeForce GT 645M

Architecture

Terascale 2 (2009−2015)

Kepler (2012−2018)

GPU code name

Blackcomb Pro

N13P-GS

Market segment

Laptop

Laptop

Release date

January 2011

March 2012

Bus support

-

PCI Express 2.0, PCI Express 3.0

Interface

MXM-B (3.0)

PCIe 3.0 x16

Core clock speed

580 MHz

Up to 710 MHz

CUDA cores

-

384

Floating-point performance

1,113.6 gflops

544.5 gflops

Manufacturing process technology

40 nm

28 nm

Number of transistors

1,700 million

1,270 million

Pipelines / CUDA cores

960

384

Power consumption (TDP)

50 Watt

32 Watt

Texture fill rate

27.84

22.7 billion/sec

Memory type

GDDR5

DDR3\GDDR5

Maximum RAM amount

2 GB

2 GB

Memory bus width

256 Bit

128bit

Memory clock speed

900 MHz

1800 MHz

Memory bandwidth

115.2 GB/s

Up to 64.0 GB/s

Shared memory

-

-

Display Connectors

No outputs

No outputs

HDMI

-

+

HDCP

-

+

Maximum VGA resolution

-

Up to 2048x1536

DirectX

11.2 (11_0)

12 API

CUDA

-

+

OpenCL

1.2

1.1

OpenGL

4.4

4.5

Shader Model

5.0

5.1

Vulkan

N/A

1.1.126

3D Blu-Ray

-

+

Optimus

-

+