AMD Radeon RX 550X vs AMD Radeon HD 7990

VS

AMD Radeon RX 550X

AMD Radeon HD 7990

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 550X and 3GB VRAM Radeon HD 7990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 550X 's Advantages

Released 5 years and 8 months late

Boost Clock has increased by 18% (1183MHz vs 1000MHz)

More VRAM (4GB vs 3GB)

Lower TDP (50W vs 375W)

AMD Radeon HD 7990 's Advantages

Larger VRAM bandwidth (288.0GB/s vs 96.00GB/s)

1536 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 550X

1.211 TFLOPS

Radeon HD 7990 +238%

4.096 TFLOPS

Radeon RX 550X

VS

Radeon HD 7990

Graphics Card

Dec 2018

Release Date

Apr 2013

Polaris

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1100 MHz

Base Clock

950 MHz

1183 MHz

Boost Clock

1000 MHz

1500 MHz

Memory Clock

1500 MHz

Memory

4GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

384bit

96.00GB/s

Bandwidth

288.0GB/s

Render Config

8

Compute Units

32

-

512

Shading Units

2048

32

TMUs

128

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

-

Theoretical Performance

18.93 GPixel/s

Pixel Rate

32.00 GPixel/s

37.86 GTexel/s

Texture Rate

128.0 GTexel/s

1211 GFLOPS

FP16 (half)

-

1211 GFLOPS

FP32 (float)

4.096 TFLOPS

75.71 GFLOPS

FP64 (double)

1024 GFLOPS

Board Design

50W

TDP

375W

250 W

Suggested PSU

750 W

1x DVI 1x HDMI 2.0b 1x DisplayPort 1.4a

Outputs

1x DVI 4x mini-DisplayPort 1.2

None

Power Connectors

2x 8-pin

Graphics Processor

Lexa

GPU Name

Malta

Lexa PRO (215-0904018)

GPU Variant

Malta XT (215-0849026)

GCN 4.0

Architecture

GCN 1.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

4.313 billion

103 mm²

Die Size

365 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

Vulkan

1.2

-

6.4

Shader Model

5.1

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