GeForce GTX 660M and Radeon RX 580X - video card comparison
Passmark - benchmark score GeForce GTX 660M vs Radeon RX 580X
GeForce GTX 660M
1478
Radeon RX 580X
8032
GeForce GTX 660M
Radeon RX 580X
Architecture
Kepler (2012−2018)
GCN 4.0 (2016−2020)
GPU code name
N13E-GE
Polaris 20
Market segment
Laptop
Desktop
Release date
March 2012
April 2018
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
-
1x 8-pin
SLI options
+
-
Boost clock speed
950 MHz
1340 MHz
Core clock speed
835 MHz
1257 MHz
CUDA cores
384
-
Floating-point performance
729.6 gflops
6,175 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
1,270 million
5,700 million
Pipelines / CUDA cores
384
2304
Power consumption (TDP)
50 Watt
185 Watt
Texture fill rate
30.4 billion/sec
193.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
8 GB
Memory bus width
128bit
256 Bit
Memory clock speed
2000 MHz
8000 MHz
Memory bandwidth
64.0 GB/s
256.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x HDMI, 3x DisplayPort
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 (12_0)
CUDA
+
-
OpenCL
1.1
2.0
OpenGL
4.5
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
1.2.131
Optimus
+
-