AMD Radeon RX 6800 vs NVIDIA GeForce GTX 660

VS

AMD Radeon RX 6800 NVIDIA GeForce GTX 660

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 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 6800 's Advantages

Released 8 years and 1 months late

Boost Clock has increased by 104% (2105MHz vs 1032MHz)

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (512.0GB/s vs 144.2GB/s)

2880 additional rendering cores

NVIDIA GeForce GTX 660 's Advantages

Lower TDP (140W vs 250W)

Score

Benchmark

FP32 (float)

Radeon RX 6800 +716%

16.17 TFLOPS

GeForce GTX 660

1.981 TFLOPS

3DMark Time Spy

Radeon RX 6800 +1143%

16261

GeForce GTX 660

1308

Radeon RX 6800

VS

GeForce GTX 660

Graphics Card

Oct 2020

Release Date

Sep 2012

Navi II

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1700 MHz

Base Clock

980 MHz

2105 MHz

Boost Clock

1032 MHz

2000 MHz

Memory Clock

1502 MHz

Memory

16GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

192bit

512.0GB/s

Bandwidth

144.2GB/s

Render Config

-

SM Count

-

60

Compute Units

-

3840

Shading Units

960

240

TMUs

80

96

ROPs

24

-

Tensor Cores

-

60

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per SMX)

4 MB

L2 Cache

384 KB

Theoretical Performance

202.1 GPixel/s

Pixel Rate

20.64 GPixel/s

505.2 GTexel/s

Texture Rate

82.56 GTexel/s

32.33 TFLOPS

FP16 (half)

-

16.17 TFLOPS

FP32 (float)

1.981 TFLOPS

1010 GFLOPS

FP64 (double)

82.56 GFLOPS

Graphics Processor

Navi 21

GPU Name

GK106

Navi 21 XL (215-121000187)

GPU Variant

GK106-400-A1

RDNA 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

26.8 billion

Transistors

2.54 billion

520 mm²

Die Size

221 mm²

Board Design

250W

TDP

140W

600 W

Suggested PSU

300 W

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

Outputs

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

2x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.3

Vulkan

1.1

-

CUDA

3.0

6.5

Shader Model

5.1

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