GeForce GT 645M and Radeon HD 6850M - video card comparison

GeForce GT 645M

Radeon HD 6850M

Architecture

Kepler (2012−2018)

Terascale 2 (2009−2015)

GPU code name

N13P-GS

Granville Pro/LP

Market segment

Laptop

Laptop

Release date

March 2012

January 2011

Bus support

PCI Express 2.0, PCI Express 3.0

-

Interface

PCIe 3.0 x16

PCIe 2.0 x16

Core clock speed

Up to 710 MHz

575 / 675 MHz

CUDA cores

384

-

Floating-point performance

544.5 gflops

1,080.0 gflops

Manufacturing process technology

28 nm

40 nm

Number of transistors

1,270 million

1,040 million

Pipelines / CUDA cores

384

800

Power consumption (TDP)

32 Watt

50 Watt

Texture fill rate

22.7 billion/sec

27.00

Memory type

DDR3\GDDR5

DDR3, GDDR5

Maximum RAM amount

2 GB

1 GB

Memory bus width

128bit

128 Bit

Memory clock speed

1800 MHz

800 MHz

Memory bandwidth

Up to 64.0 GB/s

25.6 GB/s

Shared memory

-

-

Display Connectors

No outputs

No outputs

HDMI

+

-

HDCP

+

-

Maximum VGA resolution

Up to 2048x1536

-

DirectX

12 API

11.2 (11_0)

CUDA

+

-

OpenCL

1.1

1.2

OpenGL

4.5

4.4

Shader Model

5.1

5.0

Vulkan

1.1.126

N/A

3D Blu-Ray

+

-

Optimus

+

-