AMD Radeon RX 7900 GRE vs AMD Radeon RX 6400

VS

AMD Radeon RX 7900 GRE

AMD Radeon RX 6400

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 7900 GRE 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 GRE 's Advantages

Released 1 years and 6 months late

More VRAM (16GB vs 4GB)

Larger VRAM bandwidth (576.0GB/s vs 128.0GB/s)

4352 additional rendering cores

AMD Radeon RX 6400 's Advantages

Boost Clock has increased by 3% (2321MHz vs 2245MHz)

Lower TDP (53W vs 260W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 GRE +1189%

45.98 TFLOPS

Radeon RX 6400

3.565 TFLOPS

3DMark Time Spy

Radeon RX 7900 GRE +524%

22344

Radeon RX 6400

3579

Blender

Radeon RX 7900 GRE +832%

3114

Radeon RX 6400

334

Cyberpunk 2077 2160p

Radeon RX 7900 GRE +400%

40

Radeon RX 6400

8

Cyberpunk 2077 1440p

Radeon RX 7900 GRE +700%

88

Radeon RX 6400

11

Cyberpunk 2077 1080p

Radeon RX 7900 GRE +519%

130

Radeon RX 6400

21

Radeon RX 7900 GRE

VS

Radeon RX 6400

Graphics Card

Jul 2023

Release Date

Jan 2022

Navi III

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x4

Clock Speeds

1287 MHz

Base Clock

1923 MHz

2245 MHz

Boost Clock

2321 MHz

2250 MHz

Memory Clock

2000 MHz

Memory

16GB

Memory Size

4GB

GDDR6

Memory Type

GDDR6

256bit

Memory Bus

64bit

576.0GB/s

Bandwidth

128.0GB/s

Render Config

80

Compute Units

12

-

5120

Shading Units

768

320

TMUs

48

160

ROPs

32

-

80

RT Cores

12

256 KB per Array

L1 Cache

128 KB per Array

6 MB

L2 Cache

1024 KB

64 MB

L3 Cache

16 MB

Theoretical Performance

359.2 GPixel/s

Pixel Rate

74.27 GPixel/s

718.4 GTexel/s

Texture Rate

111.4 GTexel/s

91.96 TFLOPS

FP16 (half)

7.130 TFLOPS

45.98 TFLOPS

FP32 (float)

3.565 TFLOPS

1437 GFLOPS

FP64 (double)

222.8 GFLOPS

Board Design

260W

TDP

53W

600 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 Processor

Navi 31

GPU Name

Navi 24

Navi 31 XL (215-145000206)

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

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

-

6.7

Shader Model

6.7

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