AMD Radeon RX 7900 XT vs AMD Radeon RX 6400

VS

AMD Radeon RX 7900 XT AMD Radeon RX 6400

We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 4GB VRAM Radeon RX 6400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900 XT 's Advantages

Released 10 months late

Boost Clock has increased by 3% (2394MHz vs 2321MHz)

More VRAM (20GB vs 4GB)

Larger VRAM bandwidth (800.0GB/s vs 128.0GB/s)

4608 additional rendering cores

AMD Radeon RX 6400 's Advantages

Lower TDP (53W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XT +1344%

51.48 TFLOPS

Radeon RX 6400

3.565 TFLOPS

3DMark Time Spy

Radeon RX 7900 XT +645%

26668

Radeon RX 6400

3579

Blender

Radeon RX 7900 XT +1226%

4310

Radeon RX 6400

325

Shadow of the Tomb Raider 2160p

Radeon RX 7900 XT +1175%

102

Radeon RX 6400

8

Shadow of the Tomb Raider 1440p

Radeon RX 7900 XT +925%

205

Radeon RX 6400

20

Shadow of the Tomb Raider 1080p

Radeon RX 7900 XT +754%

299

Radeon RX 6400

35

Cyberpunk 2077 2160p

Radeon RX 7900 XT +675%

62

Radeon RX 6400

8

Cyberpunk 2077 1440p

Radeon RX 7900 XT +727%

91

Radeon RX 6400

11

Cyberpunk 2077 1080p

Radeon RX 7900 XT +609%

149

Radeon RX 6400

21

Radeon RX 7900 XT

VS

Radeon RX 6400

Graphics Card

Nov 2022

Release Date

Jan 2022

Navi III

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x4

Clock Speeds

1387 MHz

Base Clock

1923 MHz

2394 MHz

Boost Clock

2321 MHz

2500 MHz

Memory Clock

2000 MHz

Memory

20GB

Memory Size

4GB

GDDR6

Memory Type

GDDR6

320bit

Memory Bus

64bit

800.0GB/s

Bandwidth

128.0GB/s

Render Config

-

SM Count

-

84

Compute Units

12

5376

Shading Units

768

336

TMUs

48

192

ROPs

32

-

Tensor Cores

-

84

RT Cores

12

256 KB per Array

L1 Cache

128 KB per Array

6 MB

L2 Cache

1024 KB

Theoretical Performance

459.6 GPixel/s

Pixel Rate

74.27 GPixel/s

804.4 GTexel/s

Texture Rate

111.4 GTexel/s

103.0 TFLOPS

FP16 (half)

7.130 TFLOPS

51.48 TFLOPS

FP32 (float)

3.565 TFLOPS

1.609 TFLOPS

FP64 (double)

222.8 GFLOPS

Graphics Processor

Navi 31

GPU Name

Navi 24

Navi 31 XT (215-145000156)

GPU Variant

Navi 24 XL (215-135000046)

RDNA 3.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

6 nm

57.7 billion

Transistors

5.4 billion

529 mm²

Die Size

107 mm²

Board Design

300W

TDP

53W

700 W

Suggested PSU

250 W

1x HDMI 2.1a 2x DisplayPort 2.1 1x USB Type-C

Outputs

1x HDMI 2.1 1x DisplayPort 1.4a

2x 8-pin

Power Connectors

None

Graphics Features

12 Ultimate (12_2)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.2

OpenCL

2.2

1.3

Vulkan

1.3

-

CUDA

-

6.7

Shader Model

6.6

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