GeForce 840M and GeForce GTX 460 X2 - video card comparison

GeForce 840M

GeForce GTX 460 X2

Architecture

Maxwell (2014−2018)

Fermi (2010−2014)

GPU code name

N15S-GT

GF104

Market segment

Laptop

Desktop

Release date

March 2014

March 2011

Bus support

PCI Express 2.0, PCI Express 3.0

-

Interface

PCIe 3.0 x8

PCIe 2.0 x16

Supplementary power connectors

-

2x 8-pin

Boost clock speed

1124 MHz

-

Core clock speed

1029 MHz

701 MHz

Floating-point performance

863.2 gflops

2x 941.5 gflops

Manufacturing process technology

28 nm

40 nm

Number of transistors

-

1,950 million

Pipelines / CUDA cores

384

336

Power consumption (TDP)

33 Watt

160 Watt

Texture fill rate

17.98

39.26

Memory type

DDR3

GDDR5

Maximum RAM amount

4 GB

1 GB

Memory bus width

64 Bit

256 Bit

Memory clock speed

2000 MHz

3600 MHz

Memory bandwidth

16.02 GB/s

115.2 GB/s

Shared memory

-

-

Display Connectors

No outputs

3x DVI, 1x mini-HDMI

HDMI

-

+

DirectX

12 (11_0)

12 (11_0)

CUDA

+

2.1

OpenCL

1.2

1.1

OpenGL

4.5

4.6

Shader Model

5.1

5.1

Vulkan

1.1.126

N/A

GameWorks

+

-

GPU Boost

2.0

-

Optimus

+

-