NVIDIA GeForce GTX 660 vs AMD Radeon RX 6800
GPU Specs Compare
Graphics Card
Release Date
Sep 2012
Oct 2020
Generation
GeForce 600
Navi II
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
980 MHz
1700 MHz
Boost Clock
1032 MHz
2105 MHz
Memory Clock
1502 MHz
2000 MHz
Memory
Memory Size
2GB
16GB
Memory Type
GDDR5
GDDR6
Memory Bus
192bit
256bit
Bandwidth
144.2GB/s
512.0GB/s
Render Config
Shading Units
960
3840
TMUs
80
240
ROPs
24
96
L1 Cache
16 KB (per SMX)
128 KB per Array
L2 Cache
384 KB
4 MB
Compute Units
-
60
RT Cores
-
60
L3 Cache
-
128 MB
Theoretical Performance
Pixel Rate
20.64 GPixel/s
202.1 GPixel/s
Texture Rate
82.56 GTexel/s
505.2 GTexel/s
FP32 (float)
1.981 TFLOPS
16.17 TFLOPS
FP64 (double)
82.56 GFLOPS
1010 GFLOPS
FP16 (half)
-
32.33 TFLOPS
Graphics Processor
GPU Name
GK106
Navi 21
GPU Variant
GK106-400-A1
Navi 21 XL(215-121000187)
Architecture
Kepler
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
7 nm
Transistors
2.54 billion
26.8 billion
Die Size
221 mm²
520 mm²
Board Design
TDP
140W
250W
Suggested PSU
300 W
600 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
Power Connectors
1x 6-pin
2x 8-pin
Graphics Features
DirectX
12 (11_0)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
3.0
2.1
Vulkan
1.1
1.3
CUDA
3.0
-
Shader Model
5.1
6.5
📊 Benchmark
3DMark Time Spy
1,194
16,182
3DMark Time Spy Extreme
260
7,771
OctaneBench
27
-
Blender
111
-
3DMark Speed Way
-
3,062