AMD Radeon HD 7850 vs AMD Radeon RX 6400

VS

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7850 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 7850 's Advantages

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

256 additional rendering cores

AMD Radeon RX 6400 's Advantages

Released 9 years and 10 months late

Boost Clock2321MHz

More VRAM (4GB vs 2GB)

Lower TDP (53W vs 130W)

Score

Benchmark

FP32 (float)

Radeon HD 7850

1.761 TFLOPS

Radeon RX 6400 +102%

3.565 TFLOPS

3DMark Time Spy

Radeon HD 7850

1312

Radeon RX 6400 +172%

3579

Radeon HD 7850

VS

Radeon RX 6400

Graphics Card

Mar 2012

Release Date

Jan 2022

Southern 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

-

SM Count

-

16

Compute Units

12

1024

Shading Units

768

64

TMUs

48

32

ROPs

32

-

Tensor Cores

-

RT Cores

12

16 KB (per CU)

L1 Cache

128 KB per Array

512 KB

L2 Cache

1024 KB

Theoretical Performance

27.52 GPixel/s

Pixel Rate

74.27 GPixel/s

55.04 GTexel/s

Texture Rate

111.4 GTexel/s

-

FP16 (half)

7.130 TFLOPS

1.761 TFLOPS

FP32 (float)

3.565 TFLOPS

110.1 GFLOPS

FP64 (double)

222.8 GFLOPS

Graphics Processor

Pitcairn

GPU Name

Navi 24

Pitcairn PRO (215-0828062)

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

Board Design

130W

TDP

53W

300 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

1x 6-pin

Power Connectors

None

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

-

CUDA

-

5.1

Shader Model

6.6

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