AMD Radeon R9 390X vs AMD Radeon RX 7800 XT

VS

AMD Radeon R9 390X

AMD Radeon RX 7800 XT

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 16GB VRAM Radeon RX 7800 XT 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 R9 390X

5.914 TFLOPS

Radeon RX 7800 XT +531%

37.32 TFLOPS

3DMark Time Spy

Radeon R9 390X

4245

Radeon RX 7800 XT +371%

20031

Radeon R9 390X

VS

Radeon RX 7800 XT

Graphics Card

Jun 2015

Release Date

Aug 2023

Pirate Islands

Generation

Navi III

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1295 MHz

-

Boost Clock

2430 MHz

1500 MHz

Memory Clock

2438 MHz

Memory

8GB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

624.1GB/s

Render Config

44

Compute Units

60

-

2816

Shading Units

3840

176

TMUs

240

64

ROPs

96

-

RT Cores

60

16 KB (per CU)

L1 Cache

128 KB per Array

1024 KB

L2 Cache

4 MB

-

L3 Cache

64 MB

Theoretical Performance

67.20 GPixel/s

Pixel Rate

233.3 GPixel/s

184.8 GTexel/s

Texture Rate

583.2 GTexel/s

-

FP16 (half)

74.65 TFLOPS

5.914 TFLOPS

FP32 (float)

37.32 TFLOPS

739.2 GFLOPS

FP64 (double)

1166 GFLOPS

Board Design

275W

TDP

263W

600 W

Suggested PSU

600 W

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

Outputs

1x HDMI 2.1a 3x DisplayPort 2.1

1x 6-pin + 1x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Grenada

GPU Name

Navi 32

Grenada XT (215-0880004)

GPU Variant

Navi 32 XT (215-180000006)

GCN 2.0

Architecture

RDNA 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

5 nm

6.2 billion

Transistors

28.1 billion

438 mm²

Die Size

346 mm²

Graphics Features

12 (12_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.0

OpenCL

2.2

1.2

Vulkan

1.3

-

6.3

Shader Model

6.7

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