NVIDIA GeForce GT 640 vs NVIDIA RTX A400

VS

NVIDIA GeForce GT 640

NVIDIA RTX A400

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 4GB VRAM RTX A400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA RTX A400 's Advantages

Released 11 years and 10 months late

Boost Clock1762MHz

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (96.00GB/s vs 28.51GB/s)

384 additional rendering cores

Lower TDP (50W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

RTX A400 +290%

2.706 TFLOPS

GeForce GT 640

VS

RTX A400

Graphics Card

Jun 2012

Release Date

Apr 2024

GeForce 600

Generation

Quadro Ampere(Ax000)

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

-

Base Clock

1417 MHz

-

Boost Clock

1762 MHz

891 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

4GB

DDR3

Memory Type

GDDR6

128bit

Memory Bus

64bit

28.51GB/s

Bandwidth

96.00GB/s

Render Config

-

SM Count

6

384

Shading Units

768

32

TMUs

24

16

ROPs

16

-

Tensor Cores

24

-

RT Cores

6

16 KB (per SMX)

L1 Cache

128 KB (per SM)

256 KB

L2 Cache

2 MB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

28.19 GPixel/s

28.86 GTexel/s

Texture Rate

42.29 GTexel/s

-

FP16 (half)

2.706 TFLOPS

692.7 GFLOPS

FP32 (float)

2.706 TFLOPS

28.86 GFLOPS

FP64 (double)

42.29 GFLOPS

Board Design

65W

TDP

50W

250 W

Suggested PSU

250 W

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

Outputs

4x mini-DisplayPort 1.4a

None

Power Connectors

None

Graphics Processor

GK107

GPU Name

GA107

GK107-300-A2

GPU Variant

-

Kepler

Architecture

Ampere

TSMC

Foundry

Samsung

28 nm

Process Size

8 nm

1.27 billion

Transistors

8.7 billion

118 mm²

Die Size

200 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

6.8

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