AMD Radeon R9 390X vs AMD Radeon RX 6900 XTX

VS

AMD Radeon R9 390X AMD Radeon RX 6900 XTX

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 16GB VRAM Radeon RX 6900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390X 's Advantages

Lower TDP (275W vs 330W)

AMD Radeon RX 6900 XTX 's Advantages

Boost Clock2435MHz

More VRAM (16GB vs 8GB)

Larger VRAM bandwidth (576.0GB/s vs 384.0GB/s)

2304 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 390X

5.914 TFLOPS

Radeon RX 6900 XTX +321%

24.93 TFLOPS

Radeon R9 390X

VS

Radeon RX 6900 XTX

Graphics Card

Jun 2015

Release Date

Unknown

Pirate Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

2075 MHz

-

Boost Clock

2435 MHz

1500 MHz

Memory Clock

2250 MHz

Memory

8GB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

576.0GB/s

Render Config

-

SM Count

-

44

Compute Units

80

2816

Shading Units

5120

176

TMUs

320

64

ROPs

128

-

Tensor Cores

-

RT Cores

80

16 KB (per CU)

L1 Cache

128 KB per Array

1024 KB

L2 Cache

4 MB

Theoretical Performance

67.20 GPixel/s

Pixel Rate

311.7 GPixel/s

184.8 GTexel/s

Texture Rate

779.2 GTexel/s

-

FP16 (half)

49.87 TFLOPS

5.914 TFLOPS

FP32 (float)

24.93 TFLOPS

739.2 GFLOPS

FP64 (double)

1.558 TFLOPS

Graphics Processor

Grenada

GPU Name

Navi 21

Grenada XT (215-0880004)

GPU Variant

Navi 21 XTXH (215-121000247)

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

275W

TDP

330W

600 W

Suggested PSU

700 W

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

Outputs

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

1x 6-pin + 1x 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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