AMD Radeon R9 390 X2 vs AMD Radeon RX 6800

VS

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 and 16GB VRAM Radeon RX 6800 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6800 's Advantages

Released 5 years and 1 months late

Boost Clock2105MHz

More VRAM (16GB vs 8GB)

Larger VRAM bandwidth (512.0GB/s vs 345.6GB/s)

1280 additional rendering cores

Lower TDP (250W vs 580W)

Score

Benchmark

FP32 (float)

Radeon R9 390 X2

5.12 TFLOPS

Radeon RX 6800 +215%

16.17 TFLOPS

Radeon R9 390 X2

VS

Radeon RX 6800

Graphics Card

Sep 2015

Release Date

Oct 2020

Pirate Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1700 MHz

-

Boost Clock

2105 MHz

1350 MHz

Memory Clock

2000 MHz

Memory

8GB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

512bit

Memory Bus

256bit

345.6GB/s

Bandwidth

512.0GB/s

Render Config

-

SM Count

-

40

Compute Units

60

2560

Shading Units

3840

160

TMUs

240

64

ROPs

96

-

Tensor Cores

-

RT Cores

60

16 KB (per CU)

L1 Cache

128 KB per Array

1024 KB

L2 Cache

4 MB

Theoretical Performance

64.00 GPixel/s

Pixel Rate

202.1 GPixel/s

160.0 GTexel/s

Texture Rate

505.2 GTexel/s

-

FP16 (half)

32.33 TFLOPS

5.120 TFLOPS

FP32 (float)

16.17 TFLOPS

640.0 GFLOPS

FP64 (double)

1010 GFLOPS

Graphics Processor

Grenada

GPU Name

Navi 21

Grenada PRO (215-0880030)

GPU Variant

Navi 21 XL (215-121000187)

GCN 2.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

7 nm

6.2 billion

Transistors

26.8 billion

438 mm²

Die Size

520 mm²

Board Design

580W

TDP

250W

950 W

Suggested PSU

600 W

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

Outputs

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

4x 8-pin

Power Connectors

2x 8-pin

Graphics Features

12 (12_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.0

OpenCL

2.1

1.2

Vulkan

1.3

-

CUDA

-

6.3

Shader Model

6.5

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