AMD Radeon RX 6600 vs ATI Radeon HD 4855

VS

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 and 512MB VRAM Radeon HD 4855 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 's Advantages

Released 11 years and 9 months late

Boost Clock2491MHz

Larger VRAM bandwidth (224.0GB/s vs 115.2GB/s)

1152 additional rendering cores

ATI Radeon HD 4855 's Advantages

Lower TDP (110W vs 132W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 +1113%

8.928 TFLOPS

Radeon HD 4855

0.736 TFLOPS

Radeon RX 6600

VS

Radeon HD 4855

Graphics Card

Oct 2021

Release Date

Jan 2010

Navi II

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1626 MHz

Base Clock

-

2491 MHz

Boost Clock

-

1750 MHz

Memory Clock

900 MHz

Memory

8GB

Memory Size

512MB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

256bit

224.0GB/s

Bandwidth

115.2GB/s

Render Config

-

SM Count

-

28

Compute Units

8

1792

Shading Units

640

112

TMUs

32

64

ROPs

16

-

Tensor Cores

-

28

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

2 MB

L2 Cache

256 KB

Theoretical Performance

159.4 GPixel/s

Pixel Rate

9.200 GPixel/s

279.0 GTexel/s

Texture Rate

18.40 GTexel/s

17.86 TFLOPS

FP16 (half)

-

8.928 TFLOPS

FP32 (float)

736.0 GFLOPS

558.0 GFLOPS

FP64 (double)

147.2 GFLOPS

Graphics Processor

Navi 23

GPU Name

RV770

Navi 23 XL (215-130000016)

GPU Variant

RV770 PRO (215-0669065)

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

7 nm

Process Size

55 nm

11.06 billion

Transistors

0.956 billion

237 mm²

Die Size

256 mm²

Board Design

132W

TDP

110W

300 W

Suggested PSU

300 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 Ultimate (12_2)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

2.1

OpenCL

1.1

1.3

Vulkan

N/A

-

CUDA

-

6.5

Shader Model

4.1

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