GeForce 840A and Stream Processor - video card comparison

GeForce 840A

Stream Processor

Architecture

Maxwell (2014−2018)

Ultra-Threaded SE

GPU code name

GM108

R580

Market segment

Desktop

Release date

March 2014

2006

Interface

PCIe 3.0 x8

PCIe 1.0 x16

Supplementary power connectors

1x 6-pin

Boost clock speed

1124 MHz

Core clock speed

1029 MHz

594 MHz

Floating-point performance

863.2 gflops

Manufacturing process technology

28 nm

90 nm

Number of transistors

384 million

Pipelines / CUDA cores

384

Power consumption (TDP)

33 Watt

165 Watt

Texture fill rate

17.98

9.504

Memory type

DDR3

GDDR3

Maximum RAM amount

2 GB

1 GB

Memory bus width

64 Bit

256 Bit

Memory clock speed

2002 MHz

1296 MBps

Memory bandwidth

16.02 GB/s

41.47 GB/s

Display Connectors

No outputs

2x DVI, 1x S-Video

DirectX

12 (11_0)

9.0c (9_3)

CUDA

5.0

OpenCL

1.2

N/A

OpenGL

4.6

2.1 (full) Shader Model5.13.0

Vulkan

1.1.126

N/A