GeForce 840M and Radeon HD 7450 OEM - video card comparison

GeForce 840M

Radeon HD 7450 OEM

Architecture

Maxwell (2014−2018)

TeraScale 2 (2009−2015)

GPU code name

N15S-GT

Caicos

Market segment

Laptop

Desktop

Release date

March 2014

January 2012

Bus support

PCI Express 2.0, PCI Express 3.0

-

Interface

PCIe 3.0 x8

PCIe 2.0 x16

Supplementary power connectors

-

None

Boost clock speed

1124 MHz

-

Core clock speed

1029 MHz

625 MHz

Floating-point performance

863.2 gflops

200.0 gflops

Manufacturing process technology

28 nm

40 nm

Number of transistors

-

370 million

Pipelines / CUDA cores

384

160

Power consumption (TDP)

33 Watt

18 Watt

Texture fill rate

17.98

5.000

Memory type

DDR3

GDDR3

Maximum RAM amount

4 GB

512 MB

Memory bus width

64 Bit

64 Bit

Memory clock speed

2000 MHz

1066 MHz

Memory bandwidth

16.02 GB/s

8.528 GB/s

Shared memory

-

-

Display Connectors

No outputs

1x DVI, 1x HDMI

HDMI

-

+

DirectX

12 (11_0)

11.2 (11_0)

CUDA

+

-

OpenCL

1.2

1.2

OpenGL

4.5

4.4

Shader Model

5.1

5.0

Vulkan

1.1.126

N/A

GameWorks

+

-

GPU Boost

2.0

-

Optimus

+

-