AMD Radeon RX 6400 vs AMD Radeon R9 390

VS

AMD Radeon RX 6400

AMD Radeon R9 390

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 8GB VRAM Radeon R9 390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6400 's Advantages

Released 6 years and 7 months late

Boost Clock2321MHz

Lower TDP (53W vs 275W)

AMD Radeon R9 390 's Advantages

More VRAM (8GB vs 4GB)

Larger VRAM bandwidth (384.0GB/s vs 128.0GB/s)

1792 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 6400

3.565 TFLOPS

Radeon R9 390 +43%

5.12 TFLOPS

3DMark Time Spy

Radeon RX 6400

3579

Radeon R9 390 +10%

3950

Radeon RX 6400

VS

Radeon R9 390

Graphics Card

Jan 2022

Release Date

Jun 2015

Navi II

Generation

Pirate Islands

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

1500 MHz

Memory

4GB

Memory Size

8GB

GDDR6

Memory Type

GDDR5

64bit

Memory Bus

512bit

128.0GB/s

Bandwidth

384.0GB/s

Render Config

12

Compute Units

40

-

768

Shading Units

2560

48

TMUs

160

32

ROPs

64

-

12

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

1024 KB

16 MB

L3 Cache

-

Theoretical Performance

74.27 GPixel/s

Pixel Rate

64.00 GPixel/s

111.4 GTexel/s

Texture Rate

160.0 GTexel/s

7.130 TFLOPS

FP16 (half)

-

3.565 TFLOPS

FP32 (float)

5.120 TFLOPS

222.8 GFLOPS

FP64 (double)

640.0 GFLOPS

Board Design

53W

TDP

275W

250 W

Suggested PSU

600 W

1x HDMI 2.1 1x DisplayPort 1.4a

Outputs

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Navi 24

GPU Name

Grenada

Navi 24 XL (215-135000046)

GPU Variant

Grenada PRO (215-0880030)

RDNA 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

6 nm

Process Size

28 nm

5.4 billion

Transistors

6.2 billion

107 mm²

Die Size

438 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.2

OpenCL

2.0

1.3

Vulkan

1.2

-

6.7

Shader Model

6.3

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