Home GPU Comparison NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon RX 6800

NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon RX 6800

NVIDIA GeForce GTX 660 Rev. 2
VS
AMD Radeon RX 6800
NVIDIA GeForce GTX 660 Rev. 2 AMD Radeon RX 6800
We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 16GB VRAM Radeon RX 6800 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
Lower TDP (140W vs 250W)
AMD Radeon RX 6800 's Advantages
Released 6 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

Score

Benchmark

FP32 (float)
GeForce GTX 660 Rev. 2
1.981 TFLOPS
Radeon RX 6800 +716%
16.17 TFLOPS
GeForce GTX 660 Rev. 2
VS
Radeon RX 6800

Graphics Card

Sep 2014
Release Date
Oct 2020
GeForce 600
Generation
Navi II
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 4.0 x16

Clock Speeds

980 MHz
Base Clock
1700 MHz
1032 MHz
Boost Clock
2105 MHz
1502 MHz
Memory Clock
2000 MHz

Memory

2GB
Memory Size
16GB
GDDR5
Memory Type
GDDR6
192bit
Memory Bus
256bit
144.2GB/s
Bandwidth
512.0GB/s

Render Config

-
SM Count
-
-
Compute Units
60
960
Shading Units
3840
80
TMUs
240
24
ROPs
96
-
Tensor Cores
-
-
RT Cores
60
16 KB (per SMX)
L1 Cache
128 KB per Array
384 KB
L2 Cache
4 MB

Theoretical Performance

20.64 GPixel/s
Pixel Rate
202.1 GPixel/s
82.56 GTexel/s
Texture Rate
505.2 GTexel/s
-
FP16 (half)
32.33 TFLOPS
1.981 TFLOPS
FP32 (float)
16.17 TFLOPS
82.56 GFLOPS
FP64 (double)
1010 GFLOPS

Graphics Processor

GK104
GPU Name
Navi 21
-
GPU Variant
Navi 21 XL (215-121000187)
Kepler
Architecture
RDNA 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
7 nm
3.54 billion
Transistors
26.8 billion
294 mm²
Die Size
520 mm²

Board Design

140W
TDP
250W
300 W
Suggested PSU
600 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
1x 6-pin
Power Connectors
2x 8-pin

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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