GeForce GTX 660 and Radeon 680M - video card comparison
Passmark - benchmark score GeForce GTX 660 vs Radeon 680M
GeForce GTX 660
4119
Radeon 680M
6351
GeForce GTX 660
Radeon 680M
Architecture
Kepler (2012−2018)
RDNA 2 (2020−2022)
GPU code name
GK106
RDNA 2 Rembrandt
Market segment
Desktop
Laptop
Release date
September 2012
January 2022
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 4.0 x8
Supplementary power connectors
One 6-pin
None
SLI options
+
-
Boost clock speed
1033 MHz
2400 MHz
Core clock speed
980 MHz
-
CUDA cores
960
-
Floating-point performance
1,981 gflops
-
Manufacturing process technology
28 nm
6 nm
Number of transistors
2,540 million
13,100 million
Pipelines / CUDA cores
960
768
Power consumption (TDP)
140 Watt
45 Watt
Texture fill rate
78.4 billion/sec
115.2
Memory type
GDDR5
System Shared
Maximum RAM amount
2 GB
System Shared
Memory bus width
192-bit GDDR5
System Shared
Memory clock speed
6.0 GB/s
System Shared
Memory bandwidth
144.2 GB/s
-
Shared memory
-
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
No outputs
Multi monitor support
4 displays
-
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 (12_1)
CUDA
+
-
OpenCL
1.2
2.0
OpenGL
4.3
4.6
Shader Model
5.1
6.5
Vulkan
1.1.126
1.2
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-