AMD Radeon RX 7800 vs AMD Radeon R9 390

VS

AMD Radeon RX 7800

AMD Radeon R9 390

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 7800 and 8GB VRAM Radeon R9 390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7800 's Advantages

Released 7 years and 7 months late

Boost Clock2800MHz

More VRAM (16GB vs 8GB)

Larger VRAM bandwidth (576.0GB/s vs 384.0GB/s)

1280 additional rendering cores

AMD Radeon R9 390 's Advantages

Lower TDP (275W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7800 +628%

37.32 TFLOPS

Radeon R9 390

5.12 TFLOPS

Radeon RX 7800

VS

Radeon R9 390

Graphics Card

Jan 2023

Release Date

Jun 2015

Navi III

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1800 MHz

Base Clock

-

2800 MHz

Boost Clock

-

2250 MHz

Memory Clock

1500 MHz

Memory

16GB

Memory Size

8GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

512bit

576.0GB/s

Bandwidth

384.0GB/s

Render Config

60

Compute Units

40

-

3840

Shading Units

2560

240

TMUs

160

128

ROPs

64

-

60

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

1024 KB

64 MB

L3 Cache

-

Theoretical Performance

358.4 GPixel/s

Pixel Rate

64.00 GPixel/s

672.0 GTexel/s

Texture Rate

160.0 GTexel/s

86.02 TFLOPS

FP16 (half)

-

43.01 TFLOPS

FP32 (float)

5.120 TFLOPS

1344 GFLOPS

FP64 (double)

640.0 GFLOPS

Board Design

300W

TDP

275W

700 W

Suggested PSU

600 W

1x HDMI 2.1a 3x DisplayPort 2.1

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 32

GPU Name

Grenada

Navi 32 XT

GPU Variant

Grenada PRO (215-0880030)

RDNA 3.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

Unknown

Transistors

6.2 billion

346 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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