AMD Radeon R9 390X vs AMD Radeon RX 7900 XT

VS

AMD Radeon R9 390X AMD Radeon RX 7900 XT

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 20GB VRAM Radeon RX 7900 XT 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 300W)

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

Score

Benchmark

FP32 (float)

Radeon R9 390X

5.914 TFLOPS

Radeon RX 7900 XT +770%

51.48 TFLOPS

3DMark Time Spy

Radeon R9 390X

4245

Radeon RX 7900 XT +529%

26739

Radeon R9 390X

VS

Radeon RX 7900 XT

Graphics Card

Jun 2015

Release Date

Nov 2022

Pirate Islands

Generation

Navi III

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1387 MHz

-

Boost Clock

2394 MHz

1500 MHz

Memory Clock

2500 MHz

Memory

8GB

Memory Size

20GB

GDDR5

Memory Type

GDDR6

512bit

Memory Bus

320bit

384.0GB/s

Bandwidth

800.0GB/s

Render Config

-

SM Count

-

44

Compute Units

84

2816

Shading Units

5376

176

TMUs

336

64

ROPs

192

-

Tensor Cores

-

RT Cores

84

16 KB (per CU)

L1 Cache

256 KB per Array

1024 KB

L2 Cache

6 MB

Theoretical Performance

67.20 GPixel/s

Pixel Rate

459.6 GPixel/s

184.8 GTexel/s

Texture Rate

804.4 GTexel/s

-

FP16 (half)

103.0 TFLOPS

5.914 TFLOPS

FP32 (float)

51.48 TFLOPS

739.2 GFLOPS

FP64 (double)

1.609 TFLOPS

Graphics Processor

Grenada

GPU Name

Navi 31

Grenada XT (215-0880004)

GPU Variant

Navi 31 XT (215-145000156)

GCN 2.0

Architecture

RDNA 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

5 nm

6.2 billion

Transistors

57.7 billion

438 mm²

Die Size

529 mm²

Board Design

275W

TDP

300W

600 W

Suggested PSU

700 W

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

Outputs

1x HDMI 2.1a 2x DisplayPort 2.1 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

2.2

1.2

Vulkan

1.3

-

CUDA

-

6.3

Shader Model

6.7

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