AMD Radeon RX 7900 XT vs AMD Radeon R9 390X

VS

AMD Radeon RX 7900 XT

AMD Radeon R9 390X

We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 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 7900 XT 's Advantages

Released 7 years and 5 months late

Boost Clock2394MHz

More VRAM (20GB vs 8GB)

Larger VRAM bandwidth (800.0GB/s vs 384.0GB/s)

2560 additional rendering cores

AMD Radeon R9 390X 's Advantages

Lower TDP (275W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XT +770%

51.48 TFLOPS

Radeon R9 390X

5.914 TFLOPS

3DMark Time Spy

Radeon RX 7900 XT +533%

26911

Radeon R9 390X

4245

Radeon RX 7900 XT

VS

Radeon R9 390X

Graphics Card

Nov 2022

Release Date

Jun 2015

Navi III

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1387 MHz

Base Clock

-

2394 MHz

Boost Clock

-

2500 MHz

Memory Clock

1500 MHz

Memory

20GB

Memory Size

8GB

GDDR6

Memory Type

GDDR5

320bit

Memory Bus

512bit

800.0GB/s

Bandwidth

384.0GB/s

Render Config

84

Compute Units

44

-

5376

Shading Units

2816

336

TMUs

176

192

ROPs

64

-

84

RT Cores

-

256 KB per Array

L1 Cache

16 KB (per CU)

6 MB

L2 Cache

1024 KB

80 MB

L3 Cache

-

Theoretical Performance

459.6 GPixel/s

Pixel Rate

67.20 GPixel/s

804.4 GTexel/s

Texture Rate

184.8 GTexel/s

103.0 TFLOPS

FP16 (half)

-

51.48 TFLOPS

FP32 (float)

5.914 TFLOPS

1.609 TFLOPS

FP64 (double)

739.2 GFLOPS

Board Design

300W

TDP

275W

700 W

Suggested PSU

600 W

1x HDMI 2.1a 2x DisplayPort 2.1 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 31

GPU Name

Grenada

Navi 31 XT (215-145000156)

GPU Variant

Grenada XT (215-0880004)

RDNA 3.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

57.7 billion

Transistors

6.2 billion

529 mm²

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

-

6.7

Shader Model

6.3

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