NVIDIA GeForce GT 640 vs NVIDIA A40 PCIe

VS

NVIDIA GeForce GT 640

NVIDIA A40 PCIe

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 48GB VRAM A40 PCIe to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 300W)

NVIDIA A40 PCIe 's Advantages

Released 8 years and 4 months late

Boost Clock1740MHz

More VRAM (48GB vs 2GB)

Larger VRAM bandwidth (695.8GB/s vs 28.51GB/s)

10368 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

A40 PCIe +5299%

37.42 TFLOPS

Blender

GeForce GT 640

32

A40 PCIe +12931%

4170

GeForce GT 640

VS

A40 PCIe

Graphics Card

Jun 2012

Release Date

Oct 2020

GeForce 600

Generation

Tesla

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1305 MHz

-

Boost Clock

1740 MHz

891 MHz

Memory Clock

1812 MHz

Memory

2GB

Memory Size

48GB

DDR3

Memory Type

GDDR6

128bit

Memory Bus

384bit

28.51GB/s

Bandwidth

695.8GB/s

Render Config

-

SM Count

84

384

Shading Units

10752

32

TMUs

336

16

ROPs

112

-

Tensor Cores

336

-

RT Cores

84

16 KB (per SMX)

L1 Cache

128 KB (per SM)

256 KB

L2 Cache

6 MB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

194.9 GPixel/s

28.86 GTexel/s

Texture Rate

584.6 GTexel/s

-

FP16 (half)

37.42 TFLOPS

692.7 GFLOPS

FP32 (float)

37.42 TFLOPS

28.86 GFLOPS

FP64 (double)

584.6 GFLOPS

Board Design

65W

TDP

300W

250 W

Suggested PSU

700 W

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

3x DisplayPort 1.4a

None

Power Connectors

8-pin EPS

Graphics Processor

GK107

GPU Name

GA102

GK107-300-A2

GPU Variant

-

Kepler

Architecture

Ampere

TSMC

Foundry

Samsung

28 nm

Process Size

8 nm

1.27 billion

Transistors

28.3 billion

118 mm²

Die Size

628 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.0

CUDA

8.6

5.1

Shader Model

6.6

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