AMD Radeon RX 6800 vs ATI Radeon HD 3850 X3

VS

AMD Radeon RX 6800

ATI Radeon HD 3850 X3

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 and 512MB VRAM Radeon HD 3850 X3 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6800 's Advantages

Boost Clock2105MHz

More VRAM (16GB vs 512GB)

Larger VRAM bandwidth (512.0GB/s vs 54.40GB/s)

3520 additional rendering cores

ATI Radeon HD 3850 X3 's Advantages

Lower TDP (145W vs 250W)

Score

Benchmark

FP32 (float)

Radeon RX 6800 +3678%

16.17 TFLOPS

Radeon HD 3850 X3

0.428 TFLOPS

Radeon RX 6800

VS

Radeon HD 3850 X3

Graphics Card

Oct 2020

Release Date

Unknown

Navi II

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1700 MHz

Base Clock

-

2105 MHz

Boost Clock

-

2000 MHz

Memory Clock

850 MHz

Memory

16GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

256bit

Memory Bus

256bit

512.0GB/s

Bandwidth

54.40GB/s

Render Config

60

Compute Units

4

-

3840

Shading Units

320

240

TMUs

16

96

ROPs

16

-

60

RT Cores

-

128 KB per Array

L1 Cache

-

4 MB

L2 Cache

256 KB

128 MB

L3 Cache

-

Theoretical Performance

202.1 GPixel/s

Pixel Rate

10.70 GPixel/s

505.2 GTexel/s

Texture Rate

10.70 GTexel/s

32.33 TFLOPS

FP16 (half)

-

16.17 TFLOPS

FP32 (float)

428.2 GFLOPS

1010 GFLOPS

FP64 (double)

-

Board Design

250W

TDP

145W

600 W

Suggested PSU

300 W

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

Outputs

4x DVI

2x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

Navi 21

GPU Name

RV670

Navi 21 XL (215-121000187)

GPU Variant

RV670 PRO (215-0708003)

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

7 nm

Process Size

55 nm

26.8 billion

Transistors

0.666 billion

520 mm²

Die Size

192 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.1

OpenCL

N/A

1.3

Vulkan

N/A

-

6.5

Shader Model

4.1

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