AMD Radeon RX 7900 XTX vs AMD Radeon R9 390 X2

VS

AMD Radeon RX 7900 XTX

AMD Radeon R9 390 X2

We compared two Desktop platform GPUs: 24GB VRAM Radeon RX 7900 XTX and 8GB VRAM Radeon R9 390 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900 XTX 's Advantages

Released 7 years and 2 months late

Boost Clock2498MHz

More VRAM (24GB vs 8GB)

Larger VRAM bandwidth (960.0GB/s vs 345.6GB/s)

3584 additional rendering cores

Lower TDP (355W vs 580W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XTX +1099%

61.39 TFLOPS

Radeon R9 390 X2

5.12 TFLOPS

Radeon RX 7900 XTX

VS

Radeon R9 390 X2

Graphics Card

Nov 2022

Release Date

Sep 2015

Navi III

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1929 MHz

Base Clock

-

2498 MHz

Boost Clock

-

2500 MHz

Memory Clock

1350 MHz

Memory

24GB

Memory Size

8GB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

512bit

960.0GB/s

Bandwidth

345.6GB/s

Render Config

96

Compute Units

40

-

6144

Shading Units

2560

384

TMUs

160

192

ROPs

64

-

96

RT Cores

-

256 KB per Array

L1 Cache

16 KB (per CU)

6 MB

L2 Cache

1024 KB

96 MB

L3 Cache

-

Theoretical Performance

479.6 GPixel/s

Pixel Rate

64.00 GPixel/s

959.2 GTexel/s

Texture Rate

160.0 GTexel/s

122.8 TFLOPS

FP16 (half)

-

61.39 TFLOPS

FP32 (float)

5.120 TFLOPS

1.918 TFLOPS

FP64 (double)

640.0 GFLOPS

Board Design

355W

TDP

580W

750 W

Suggested PSU

950 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

4x 8-pin

Graphics Processor

Navi 31

GPU Name

Grenada

Navi 31 XTX (215-145000146)

GPU Variant

Grenada PRO (215-0880030)

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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