AMD Radeon RX 6400 vs NVIDIA GeForce GT 640 OEM

VS

AMD Radeon RX 6400 NVIDIA GeForce GT 640 OEM

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 2GB VRAM GeForce GT 640 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6400 's Advantages

Released 9 years and 9 months late

Boost Clock2321MHz

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (128.0GB/s vs 28.51GB/s)

384 additional rendering cores

NVIDIA GeForce GT 640 OEM 's Advantages

Lower TDP (50W vs 53W)

Score

Benchmark

FP32 (float)

Radeon RX 6400 +482%

3.565 TFLOPS

GeForce GT 640 OEM

0.612 TFLOPS

Radeon RX 6400

VS

GeForce GT 640 OEM

Graphics Card

Jan 2022

Release Date

Apr 2012

Navi II

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x4

Bus Interface

PCIe 3.0 x16

Clock Speeds

1923 MHz

Base Clock

-

2321 MHz

Boost Clock

-

2000 MHz

Memory Clock

891 MHz

Memory

4GB

Memory Size

2GB

GDDR6

Memory Type

DDR3

64bit

Memory Bus

128bit

128.0GB/s

Bandwidth

28.51GB/s

Render Config

-

SM Count

-

12

Compute Units

-

768

Shading Units

384

48

TMUs

32

ROPs

16

-

Tensor Cores

-

12

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

256 KB

Theoretical Performance

74.27 GPixel/s

Pixel Rate

6.376 GPixel/s

111.4 GTexel/s

Texture Rate

25.50 GTexel/s

7.130 TFLOPS

FP16 (half)

-

3.565 TFLOPS

FP32 (float)

612.1 GFLOPS

222.8 GFLOPS

FP64 (double)

25.50 GFLOPS

Graphics Processor

Navi 24

GPU Name

GK107

Navi 24 XL (215-135000046)

GPU Variant

GK107-320-A2

RDNA 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

6 nm

Process Size

28 nm

5.4 billion

Transistors

1.27 billion

107 mm²

Die Size

118 mm²

Board Design

53W

TDP

50W

250 W

Suggested PSU

250 W

1x HDMI 2.1 1x DisplayPort 1.4a

Outputs

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

None

Power Connectors

None

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.2

OpenCL

3.0

1.3

Vulkan

1.1

-

CUDA

3.0

6.6

Shader Model

5.1

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