NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon 550X 640SP

VS

NVIDIA GeForce GTX 660 Rev. 2

AMD Radeon 550X 640SP

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 4GB VRAM Radeon 550X 640SP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Larger VRAM bandwidth (144.2GB/s vs 48.00GB/s)

320 additional rendering cores

AMD Radeon 550X 640SP 's Advantages

Released 3 years and 7 months late

Boost Clock has increased by 4% (1071MHz vs 1032MHz)

More VRAM (4GB vs 2GB)

Lower TDP (50W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2 +44%

1.981 TFLOPS

Radeon 550X 640SP

1.371 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon 550X 640SP

Graphics Card

Sep 2014

Release Date

Apr 2018

GeForce 600

Generation

Polaris

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

980 MHz

Base Clock

1019 MHz

1032 MHz

Boost Clock

1071 MHz

1502 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

64bit

144.2GB/s

Bandwidth

48.00GB/s

Render Config

-

Compute Units

10

-

960

Shading Units

640

80

TMUs

40

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

17.14 GPixel/s

82.56 GTexel/s

Texture Rate

42.84 GTexel/s

-

FP16 (half)

1371 GFLOPS

1.981 TFLOPS

FP32 (float)

1371 GFLOPS

82.56 GFLOPS

FP64 (double)

85.68 GFLOPS

Board Design

140W

TDP

50W

300 W

Suggested PSU

250 W

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

Outputs

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

1x 6-pin

Power Connectors

None

Graphics Processor

GK104

GPU Name

Lexa

-

GPU Variant

Lexa PRO (215-0904018)

Kepler

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

3.54 billion

Transistors

2.2 billion

294 mm²

Die Size

103 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

3.0

OpenCL

2.1

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

6.4

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