NVIDIA GeForce RTX 3090 vs NVIDIA GeForce GTX 660

VS

NVIDIA GeForce RTX 3090 NVIDIA GeForce GTX 660

We compared two Desktop platform GPUs: 24GB VRAM GeForce RTX 3090 and 2GB VRAM GeForce GTX 660 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 3090 's Advantages

Released 8 years late

Boost Clock has increased by 64% (1695MHz vs 1032MHz)

More VRAM (24GB vs 2GB)

Larger VRAM bandwidth (936.2GB/s vs 144.2GB/s)

9536 additional rendering cores

NVIDIA GeForce GTX 660 's Advantages

Lower TDP (140W vs 350W)

Score

Benchmark

FP32 (float)

GeForce RTX 3090 +1696%

35.58 TFLOPS

GeForce GTX 660

1.981 TFLOPS

3DMark Time Spy

GeForce RTX 3090 +1422%

19908

GeForce GTX 660

1308

GeForce RTX 3090

VS

GeForce GTX 660

Graphics Card

Sep 2020

Release Date

Sep 2012

GeForce 30

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1395 MHz

Base Clock

980 MHz

1695 MHz

Boost Clock

1032 MHz

1219 MHz

Memory Clock

1502 MHz

Memory

24GB

Memory Size

2GB

GDDR6X

Memory Type

GDDR5

384bit

Memory Bus

192bit

936.2GB/s

Bandwidth

144.2GB/s

Render Config

82

SM Count

-

Compute Units

-

10496

Shading Units

960

328

TMUs

80

112

ROPs

24

328

Tensor Cores

-

82

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per SMX)

6 MB

L2 Cache

384 KB

Theoretical Performance

189.8 GPixel/s

Pixel Rate

20.64 GPixel/s

556.0 GTexel/s

Texture Rate

82.56 GTexel/s

35.58 TFLOPS

FP16 (half)

-

35.58 TFLOPS

FP32 (float)

1.981 TFLOPS

556.0 GFLOPS

FP64 (double)

82.56 GFLOPS

Graphics Processor

GA102

GPU Name

GK106

GA102-300-A1

GPU Variant

GK106-400-A1

Ampere

Architecture

Kepler

Samsung

Foundry

TSMC

8 nm

Process Size

28 nm

28.3 billion

Transistors

2.54 billion

628 mm²

Die Size

221 mm²

Board Design

350W

TDP

140W

750 W

Suggested PSU

300 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 12-pin

Power Connectors

1x 6-pin

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

8.6

CUDA

3.0

6.6

Shader Model

5.1

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