GeForce 840M and GeForce GTX 490 - video card comparison

GeForce 840M

GeForce GTX 490

Architecture

Maxwell (2014−2018)

Fermi (2010−2014)

GPU code name

N15S-GT

GF100

Market segment

Laptop

Desktop

Release date

March 2014

-

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

608 MHz

Floating-point performance

863.2 gflops

-

Manufacturing process technology

28 nm

40 nm

Number of transistors

-

3,100 million

Pipelines / CUDA cores

384

480

Power consumption (TDP)

33 Watt

365 Watt

Texture fill rate

17.98

36.48

Memory type

DDR3

GDDR5

Maximum RAM amount

4 GB

1536 MB

Memory bus width

64 Bit

384 Bit

Memory clock speed

2000 MHz

3.4 GB/s

Memory bandwidth

16.02 GB/s

164.0 GB/s

Shared memory

-

-

Display Connectors

No outputs

3x DVI, 1x mini-DisplayPort

DirectX

12 (11_0)

12 (11_0)

CUDA

+

2.0

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

+

-