AMD Radeon RX 7800 XT vs AMD Radeon R9 390X

VS

AMD Radeon RX 7800 XT AMD Radeon R9 390X

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 7800 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 7800 XT 's Advantages

Released 8 years and 2 months late

Boost Clock2430MHz

More VRAM (16GB vs 8GB)

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

1024 additional rendering cores

Lower TDP (263W vs 275W)

Score

Benchmark

FP32 (float)

Radeon RX 7800 XT +531%

37.32 TFLOPS

Radeon R9 390X

5.914 TFLOPS

3DMark Time Spy

Radeon RX 7800 XT +371%

20026

Radeon R9 390X

4245

Radeon RX 7800 XT

VS

Radeon R9 390X

Graphics Card

Aug 2023

Release Date

Jun 2015

Navi III

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

-

SM Count

-

60

Compute Units

44

3840

Shading Units

2816

240

TMUs

176

96

ROPs

64

-

Tensor Cores

-

60

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

1024 KB

Theoretical Performance

233.3 GPixel/s

Pixel Rate

67.20 GPixel/s

583.2 GTexel/s

Texture Rate

184.8 GTexel/s

74.65 TFLOPS

FP16 (half)

-

37.32 TFLOPS

FP32 (float)

5.914 TFLOPS

1166 GFLOPS

FP64 (double)

739.2 GFLOPS

Graphics Processor

Navi 32

GPU Name

Grenada

Navi 32 XT (215-180000006)

GPU Variant

Grenada XT (215-0880004)

RDNA 3.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

28.1 billion

Transistors

6.2 billion

346 mm²

Die Size

438 mm²

Board Design

263W

TDP

275W

600 W

Suggested PSU

600 W

1x HDMI 2.1a 3x 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 Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.2

OpenCL

2.0

1.3

Vulkan

1.2

-

CUDA

-

6.7

Shader Model

6.3

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