AMD Radeon HD 8870 OEM vs AMD Radeon RX 6400

VS

AMD Radeon HD 8870 OEM

AMD Radeon RX 6400

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 8870 OEM 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 8870 OEM 's Advantages

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

512 additional rendering cores

AMD Radeon RX 6400 's Advantages

Released 9 years late

Boost Clock2321MHz

More VRAM (4GB vs 2GB)

Lower TDP (53W vs 175W)

Score

Benchmark

FP32 (float)

Radeon HD 8870 OEM

2.56 TFLOPS

Radeon RX 6400 +39%

3.565 TFLOPS

Radeon HD 8870 OEM

VS

Radeon RX 6400

Graphics Card

Jan 2013

Release Date

Jan 2022

Sea Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x4

Clock Speeds

-

Base Clock

1923 MHz

-

Boost Clock

2321 MHz

1200 MHz

Memory Clock

2000 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

64bit

153.6GB/s

Bandwidth

128.0GB/s

Render Config

20

Compute Units

12

-

1280

Shading Units

768

80

TMUs

48

32

ROPs

32

-

RT Cores

12

16 KB (per CU)

L1 Cache

128 KB per Array

512 KB

L2 Cache

1024 KB

-

L3 Cache

16 MB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

74.27 GPixel/s

80.00 GTexel/s

Texture Rate

111.4 GTexel/s

-

FP16 (half)

7.130 TFLOPS

2.560 TFLOPS

FP32 (float)

3.565 TFLOPS

160.0 GFLOPS

FP64 (double)

222.8 GFLOPS

Board Design

175W

TDP

53W

450 W

Suggested PSU

250 W

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

Outputs

1x HDMI 2.1 1x DisplayPort 1.4a

2x 6-pin

Power Connectors

None

Graphics Processor

Pitcairn

GPU Name

Navi 24

Pitcairn XT (215-0828047)

GPU Variant

Navi 24 XL (215-135000046)

GCN 1.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

6 nm

2.8 billion

Transistors

5.4 billion

212 mm²

Die Size

107 mm²

Graphics Features

12 (11_1)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.2

OpenCL

2.2

1.2

Vulkan

1.3

-

5.1

Shader Model

6.7

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