GeForce GTX 660M and Radeon R7 M275DX - video card comparison
GeForce GTX 660M
Radeon R7 M275DX
Architecture
Kepler (2012−2018)
GCN (2011−2017)
GPU code name
N13E-GE
-
Market segment
Laptop
Laptop
Release date
March 2012
June 2014
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
-
SLI options
+
-
Boost clock speed
950 MHz
-
Core clock speed
835 MHz
-
CUDA cores
384
-
Floating-point performance
729.6 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
-
Pipelines / CUDA cores
384
896
Power consumption (TDP)
50 Watt
-
Texture fill rate
30.4 billion/sec
-
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
-
Memory bus width
128bit
-
Memory clock speed
2000 MHz
-
Memory bandwidth
64.0 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
-
Eyefinity
-
+
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12
CUDA
+
-
OpenCL
1.1
-
OpenGL
4.5
-
Shader Model
5.1
-
Vulkan
1.1.126
-
AppAcceleration
-
+
Optimus
+
-