AMD Radeon Pro W6800X Duo vs ATI Radeon HD 4855

VS

AMD Radeon Pro W6800X Duo

ATI Radeon HD 4855

We compared two Desktop platform GPUs: 32GB VRAM Radeon Pro W6800X Duo 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 Pro W6800X Duo 's Advantages

Released 11 years and 7 months late

Boost Clock1967MHz

More VRAM (32GB vs 512GB)

Larger VRAM bandwidth (512.0GB/s vs 115.2GB/s)

3200 additional rendering cores

ATI Radeon HD 4855 's Advantages

Lower TDP (110W vs 400W)

Score

Benchmark

FP32 (float)

Radeon Pro W6800X Duo +1952%

15.11 TFLOPS

Radeon HD 4855

0.736 TFLOPS

Radeon Pro W6800X Duo

VS

Radeon HD 4855

Graphics Card

Aug 2021

Release Date

Jan 2010

Radeon Pro Mac

Generation

Radeon R700

Desktop

Type

Desktop

Apple MPX

Bus Interface

PCIe 2.0 x16

Clock Speeds

1800 MHz

Base Clock

-

1967 MHz

Boost Clock

-

2000 MHz

Memory Clock

900 MHz

Memory

32GB

Memory Size

512MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

256bit

512.0GB/s

Bandwidth

115.2GB/s

Render Config

60

Compute Units

8

-

3840

Shading Units

640

240

TMUs

32

96

ROPs

16

-

60

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

256 KB

128 MB

L3 Cache

-

Theoretical Performance

188.8 GPixel/s

Pixel Rate

9.200 GPixel/s

472.1 GTexel/s

Texture Rate

18.40 GTexel/s

30.21 TFLOPS

FP16 (half)

-

15.11 TFLOPS

FP32 (float)

736.0 GFLOPS

944.2 GFLOPS

FP64 (double)

147.2 GFLOPS

Board Design

400W

TDP

110W

800 W

Suggested PSU

300 W

1x HDMI 2.1 4x Thunderbolt

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

None

Power Connectors

1x 6-pin

Graphics Processor

Navi 21

GPU Name

RV770

Navi 21 Pro-XLA

GPU Variant

RV770 PRO (215-0669065)

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

7 nm

Process Size

55 nm

26.8 billion

Transistors

0.956 billion

520 mm²

Die Size

256 mm²

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

-

6.7

Shader Model

4.1

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