AMD Radeon HD 6870 vs AMD Radeon RX 6400

VS

AMD Radeon HD 6870

AMD Radeon RX 6400

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 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 HD 6870 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 128.0GB/s)

352 additional rendering cores

AMD Radeon RX 6400 's Advantages

Released 11 years and 3 months late

Boost Clock2321MHz

More VRAM (4GB vs 1024GB)

Lower TDP (53W vs 151W)

Score

Benchmark

FP32 (float)

Radeon HD 6870

2.016 TFLOPS

Radeon RX 6400 +76%

3.565 TFLOPS

Radeon HD 6870

VS

Radeon RX 6400

Graphics Card

Oct 2010

Release Date

Jan 2022

Northern Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x4

Clock Speeds

-

Base Clock

1923 MHz

-

Boost Clock

2321 MHz

1050 MHz

Memory Clock

2000 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

64bit

134.4GB/s

Bandwidth

128.0GB/s

Render Config

14

Compute Units

12

-

1120

Shading Units

768

56

TMUs

48

32

ROPs

32

-

RT Cores

12

8 KB (per CU)

L1 Cache

128 KB per Array

512 KB

L2 Cache

1024 KB

-

L3 Cache

16 MB

Theoretical Performance

28.80 GPixel/s

Pixel Rate

74.27 GPixel/s

50.40 GTexel/s

Texture Rate

111.4 GTexel/s

-

FP16 (half)

7.130 TFLOPS

2.016 TFLOPS

FP32 (float)

3.565 TFLOPS

-

FP64 (double)

222.8 GFLOPS

Board Design

151W

TDP

53W

450 W

Suggested PSU

250 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

1x HDMI 2.1 1x DisplayPort 1.4a

2x 6-pin

Power Connectors

None

Graphics Processor

Barts

GPU Name

Navi 24

Barts XT (215-0798000)

GPU Variant

Navi 24 XL (215-135000046)

TeraScale 2

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

6 nm

1.7 billion

Transistors

5.4 billion

255 mm²

Die Size

107 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

2.2

N/A

Vulkan

1.3

-

5.0

Shader Model

6.7

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