AMD Radeon RX 6400 vs AMD Radeon HD 7870 XT

VS

AMD Radeon RX 6400 AMD Radeon HD 7870 XT

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 2GB VRAM Radeon HD 7870 XT 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 2 months late

Boost Clock has increased by 138% (2321MHz vs 975MHz)

More VRAM (4GB vs 2GB)

Lower TDP (53W vs 185W)

AMD Radeon HD 7870 XT 's Advantages

Larger VRAM bandwidth (192.0GB/s vs 128.0GB/s)

768 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 6400 +19%

3.565 TFLOPS

Radeon HD 7870 XT

2.995 TFLOPS

Radeon RX 6400

VS

Radeon HD 7870 XT

Graphics Card

Jan 2022

Release Date

Nov 2012

Navi II

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 4.0 x4

Bus Interface

PCIe 3.0 x16

Clock Speeds

1923 MHz

Base Clock

925 MHz

2321 MHz

Boost Clock

975 MHz

2000 MHz

Memory Clock

1500 MHz

Memory

4GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

64bit

Memory Bus

256bit

128.0GB/s

Bandwidth

192.0GB/s

Render Config

-

SM Count

-

12

Compute Units

24

768

Shading Units

1536

48

TMUs

96

32

ROPs

32

-

Tensor Cores

-

12

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

512 KB

Theoretical Performance

74.27 GPixel/s

Pixel Rate

31.20 GPixel/s

111.4 GTexel/s

Texture Rate

93.60 GTexel/s

7.130 TFLOPS

FP16 (half)

-

3.565 TFLOPS

FP32 (float)

2.995 TFLOPS

222.8 GFLOPS

FP64 (double)

748.8 GFLOPS

Graphics Processor

Navi 24

GPU Name

Tahiti

Navi 24 XL (215-135000046)

GPU Variant

Tahiti LE (215-0821122)

RDNA 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

6 nm

Process Size

28 nm

5.4 billion

Transistors

4.313 billion

107 mm²

Die Size

352 mm²

Board Design

53W

TDP

185W

250 W

Suggested PSU

450 W

1x HDMI 2.1 1x DisplayPort 1.4a

Outputs

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

None

Power Connectors

2x 6-pin

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.2

OpenCL

1.2

1.3

Vulkan

1.2

-

CUDA

-

6.6

Shader Model

5.1

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