AMD Radeon RX 8800 XT vs AMD Radeon R9 390X

VS

AMD Radeon RX 8800 XT

AMD Radeon R9 390X

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 8800 XT and 8GB VRAM Radeon R9 390X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 8800 XT 's Advantages

Boost Clock2430MHz

More VRAM (16GB vs 8GB)

Larger VRAM bandwidth (624.1GB/s vs 384.0GB/s)

1280 additional rendering cores

Lower TDP (220W vs 275W)

Score

Benchmark

FP32 (float)

Radeon RX 8800 XT +236%

19.91 TFLOPS

Radeon R9 390X

5.914 TFLOPS

Radeon RX 8800 XT

VS

Radeon R9 390X

Graphics Card

Unknown

Release Date

Jun 2015

Navi IV(RX 8000)

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1295 MHz

Base Clock

-

2430 MHz

Boost Clock

-

2438 MHz

Memory Clock

1500 MHz

Memory

16GB

Memory Size

8GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

512bit

624.1GB/s

Bandwidth

384.0GB/s

Render Config

64

Compute Units

44

-

4096

Shading Units

2816

256

TMUs

176

96

ROPs

64

-

64

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

1024 KB

64 MB

L3 Cache

-

Theoretical Performance

233.3 GPixel/s

Pixel Rate

67.20 GPixel/s

622.1 GTexel/s

Texture Rate

184.8 GTexel/s

39.81 TFLOPS

FP16 (half)

-

19.91 TFLOPS

FP32 (float)

5.914 TFLOPS

622.1 GFLOPS

FP64 (double)

739.2 GFLOPS

Board Design

220W

TDP

275W

550 W

Suggested PSU

600 W

1x HDMI 2.1a3x DisplayPort 2.1

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 48

GPU Name

Grenada

Navi 48 XT

GPU Variant

Grenada XT (215-0880004)

RDNA 4.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

4 nm

Process Size

28 nm

Unknown

Transistors

6.2 billion

Unknown

Die Size

438 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.2

OpenCL

2.0

1.3

Vulkan

1.2

-

6.8

Shader Model

6.3

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