AMD Radeon RX 550X vs NVIDIA GeForce GTX 660

VS

AMD Radeon RX 550X

NVIDIA GeForce GTX 660

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 550X and 2GB VRAM GeForce GTX 660 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 550X 's Advantages

Released 6 years and 3 months late

Boost Clock has increased by 15% (1183MHz vs 1032MHz)

More VRAM (4GB vs 2GB)

Lower TDP (50W vs 140W)

NVIDIA GeForce GTX 660 's Advantages

Larger VRAM bandwidth (144.2GB/s vs 96.00GB/s)

448 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 550X

1.211 TFLOPS

GeForce GTX 660 +63%

1.981 TFLOPS

Radeon RX 550X

VS

GeForce GTX 660

Graphics Card

Dec 2018

Release Date

Sep 2012

Polaris

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1100 MHz

Base Clock

980 MHz

1183 MHz

Boost Clock

1032 MHz

1500 MHz

Memory Clock

1502 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

192bit

96.00GB/s

Bandwidth

144.2GB/s

Render Config

8

Compute Units

-

512

Shading Units

960

32

TMUs

80

16

ROPs

24

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

384 KB

-

Theoretical Performance

18.93 GPixel/s

Pixel Rate

20.64 GPixel/s

37.86 GTexel/s

Texture Rate

82.56 GTexel/s

1211 GFLOPS

FP16 (half)

-

1211 GFLOPS

FP32 (float)

1.981 TFLOPS

75.71 GFLOPS

FP64 (double)

82.56 GFLOPS

Board Design

50W

TDP

140W

250 W

Suggested PSU

300 W

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

Outputs

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

None

Power Connectors

1x 6-pin

Graphics Processor

Lexa

GPU Name

GK106

Lexa PRO (215-0904018)

GPU Variant

GK106-400-A1

GCN 4.0

Architecture

Kepler

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

2.54 billion

103 mm²

Die Size

221 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

6.4

Shader Model

5.1

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