NVIDIA GeForce GTX 660 vs AMD Radeon RX 6600

VS

NVIDIA GeForce GTX 660

AMD Radeon RX 6600

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 8GB VRAM Radeon RX 6600 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 's Advantages

Released 9 years and 1 months late

Boost Clock has increased by 141% (2491MHz vs 1032MHz)

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (224.0GB/s vs 144.2GB/s)

832 additional rendering cores

Lower TDP (132W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660

1.981 TFLOPS

Radeon RX 6600 +350%

8.928 TFLOPS

3DMark Time Spy

GeForce GTX 660

1308

Radeon RX 6600 +518%

8084

GeForce GTX 660

VS

Radeon RX 6600

Graphics Card

Sep 2012

Release Date

Oct 2021

GeForce 600

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

980 MHz

Base Clock

1626 MHz

1032 MHz

Boost Clock

2491 MHz

1502 MHz

Memory Clock

1750 MHz

Memory

2GB

Memory Size

8GB

GDDR5

Memory Type

GDDR6

192bit

Memory Bus

128bit

144.2GB/s

Bandwidth

224.0GB/s

Render Config

-

Compute Units

28

-

960

Shading Units

1792

80

TMUs

112

24

ROPs

64

-

RT Cores

28

16 KB (per SMX)

L1 Cache

128 KB per Array

384 KB

L2 Cache

2 MB

-

L3 Cache

32 MB

Theoretical Performance

20.64 GPixel/s

Pixel Rate

159.4 GPixel/s

82.56 GTexel/s

Texture Rate

279.0 GTexel/s

-

FP16 (half)

17.86 TFLOPS

1.981 TFLOPS

FP32 (float)

8.928 TFLOPS

82.56 GFLOPS

FP64 (double)

558.0 GFLOPS

Board Design

140W

TDP

132W

300 W

Suggested PSU

300 W

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

Outputs

1x HDMI 2.1 3x DisplayPort 1.4a

1x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

GK106

GPU Name

Navi 23

GK106-400-A1

GPU Variant

Navi 23 XL (215-130000016)

Kepler

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

7 nm

2.54 billion

Transistors

11.06 billion

221 mm²

Die Size

237 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

3.0

OpenCL

2.1

1.1

Vulkan

1.3

3.0

CUDA

-

5.1

Shader Model

6.5

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