GeForce GTX 660M and Radeon RX 455 OEM - video card comparison
GeForce GTX 660M
Radeon RX 455 OEM
Architecture
Kepler (2012−2018)
GCN 2.0 (2013−2017)
GPU code name
N13E-GE
Tobago
Market segment
Laptop
Desktop
Release date
March 2012
June 2016
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
-
1x 6-pin
SLI options
+
-
Boost clock speed
950 MHz
-
Core clock speed
835 MHz
1050 MHz
CUDA cores
384
-
Floating-point performance
729.6 gflops
1,613 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
2,080 million
Pipelines / CUDA cores
384
768
Power consumption (TDP)
50 Watt
100 Watt
Texture fill rate
30.4 billion/sec
50.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
128bit
128 Bit
Memory clock speed
2000 MHz
6500 MHz
Memory bandwidth
64.0 GB/s
104.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x 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
6.3
Vulkan
1.1.126
1.2.131
Optimus
+
-