AMD Radeon R9 390 X2 vs AMD Radeon RX 7990 XTX

VS

AMD Radeon R9 390 X2 AMD Radeon RX 7990 XTX

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 and 24GB VRAM Radeon RX 7990 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7990 XTX 's Advantages

Boost Clock3599MHz

More VRAM (24GB vs 8GB)

Larger VRAM bandwidth (1152GB/s vs 345.6GB/s)

3584 additional rendering cores

Lower TDP (405W vs 580W)

Score

Benchmark

FP32 (float)

Radeon R9 390 X2

5.12 TFLOPS

Radeon RX 7990 XTX +1627%

88.45 TFLOPS

Radeon R9 390 X2

VS

Radeon RX 7990 XTX

Graphics Card

Sep 2015

Release Date

Unknown

Pirate Islands

Generation

Navi III

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

2500 MHz

-

Boost Clock

3599 MHz

1350 MHz

Memory Clock

3000 MHz

Memory

8GB

Memory Size

24GB

GDDR5

Memory Type

GDDR6

512bit

Memory Bus

384bit

345.6GB/s

Bandwidth

1152GB/s

Render Config

-

SM Count

-

40

Compute Units

96

2560

Shading Units

6144

160

TMUs

384

64

ROPs

192

-

Tensor Cores

-

RT Cores

96

16 KB (per CU)

L1 Cache

256 KB per Array

1024 KB

L2 Cache

6 MB

Theoretical Performance

64.00 GPixel/s

Pixel Rate

691.0 GPixel/s

160.0 GTexel/s

Texture Rate

1382 GTexel/s

-

FP16 (half)

176.9 TFLOPS

5.120 TFLOPS

FP32 (float)

88.45 TFLOPS

640.0 GFLOPS

FP64 (double)

2.764 TFLOPS

Graphics Processor

Grenada

GPU Name

Navi 31

Grenada PRO (215-0880030)

GPU Variant

Navi 31 XTX+

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

580W

TDP

405W

950 W

Suggested PSU

800 W

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

Outputs

1x HDMI 2.1a 2x DisplayPort 2.1 1x USB Type-C

4x 8-pin

Power Connectors

3x 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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