GeForce GTX 660M and Radeon HD 8850M - video card comparison
Passmark - benchmark score GeForce GTX 660M vs Radeon HD 8850M
GeForce GTX 660M
1478
Radeon HD 8850M
1002
GeForce GTX 660M
Radeon HD 8850M
Architecture
Kepler (2012−2018)
GCN (2011−2017)
GPU code name
N13E-GE
Venus
Market segment
Laptop
Laptop
Release date
March 2012
December 2012
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 3.0 x16
SLI options
+
-
Boost clock speed
950 MHz
725 MHz
Core clock speed
835 MHz
575 MHz
CUDA cores
384
-
Floating-point performance
729.6 gflops
800.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
1,500 million
Pipelines / CUDA cores
384
640
Power consumption (TDP)
50 Watt
-
Texture fill rate
30.4 billion/sec
25.00
Memory type
GDDR5
GDDR5, DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128bit
128 Bit
Memory clock speed
2000 MHz
4500 MHz
Memory bandwidth
64.0 GB/s
32 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 (11_1)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131
Optimus
+
-