AMD Radeon RX 6800 vs AMD Radeon R9 390

VS

AMD Radeon RX 6800

AMD Radeon R9 390

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 and 8GB VRAM Radeon R9 390 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 4 months late

Boost Clock2105MHz

More VRAM (16GB vs 8GB)

Larger VRAM bandwidth (512.0GB/s vs 384.0GB/s)

1280 additional rendering cores

Lower TDP (250W vs 275W)

Score

Benchmark

FP32 (float)

Radeon RX 6800 +215%

16.17 TFLOPS

Radeon R9 390

5.12 TFLOPS

3DMark Time Spy

Radeon RX 6800 +310%

16233

Radeon R9 390

3950

Radeon RX 6800

VS

Radeon R9 390

Graphics Card

Oct 2020

Release Date

Jun 2015

Navi II

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1700 MHz

Base Clock

-

2105 MHz

Boost Clock

-

2000 MHz

Memory Clock

1500 MHz

Memory

16GB

Memory Size

8GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

512bit

512.0GB/s

Bandwidth

384.0GB/s

Render Config

60

Compute Units

40

-

3840

Shading Units

2560

240

TMUs

160

96

ROPs

64

-

60

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

1024 KB

128 MB

L3 Cache

-

Theoretical Performance

202.1 GPixel/s

Pixel Rate

64.00 GPixel/s

505.2 GTexel/s

Texture Rate

160.0 GTexel/s

32.33 TFLOPS

FP16 (half)

-

16.17 TFLOPS

FP32 (float)

5.120 TFLOPS

1010 GFLOPS

FP64 (double)

640.0 GFLOPS

Board Design

250W

TDP

275W

600 W

Suggested PSU

600 W

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

Outputs

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

2x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Navi 21

GPU Name

Grenada

Navi 21 XL (215-121000187)

GPU Variant

Grenada PRO (215-0880030)

RDNA 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

26.8 billion

Transistors

6.2 billion

520 mm²

Die Size

438 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1

OpenCL

2.0

1.3

Vulkan

1.2

-

6.5

Shader Model

6.3

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