AMD Radeon RX 6400 vs AMD Radeon HD 8870 OEM

VS

AMD Radeon RX 6400 AMD Radeon HD 8870 OEM

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 2GB VRAM Radeon HD 8870 OEM 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 late

Boost Clock2321MHz

More VRAM (4GB vs 2GB)

Lower TDP (53W vs 175W)

AMD Radeon HD 8870 OEM 's Advantages

Larger VRAM bandwidth (153.6GB/s vs 128.0GB/s)

512 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 6400 +39%

3.565 TFLOPS

Radeon HD 8870 OEM

2.56 TFLOPS

Radeon RX 6400

VS

Radeon HD 8870 OEM

Graphics Card

Jan 2022

Release Date

Jan 2013

Navi II

Generation

Sea 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

1200 MHz

Memory

4GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

64bit

Memory Bus

256bit

128.0GB/s

Bandwidth

153.6GB/s

Render Config

-

SM Count

-

12

Compute Units

20

768

Shading Units

1280

48

TMUs

80

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

32.00 GPixel/s

111.4 GTexel/s

Texture Rate

80.00 GTexel/s

7.130 TFLOPS

FP16 (half)

-

3.565 TFLOPS

FP32 (float)

2.560 TFLOPS

222.8 GFLOPS

FP64 (double)

160.0 GFLOPS

Graphics Processor

Navi 24

GPU Name

Pitcairn

Navi 24 XL (215-135000046)

GPU Variant

Pitcairn XT (215-0828047)

RDNA 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

6 nm

Process Size

28 nm

5.4 billion

Transistors

2.8 billion

107 mm²

Die Size

212 mm²

Board Design

53W

TDP

175W

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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