GeForce GTX 660M and Radeon HD 6770M - video card comparison
Passmark - benchmark score GeForce GTX 660M vs Radeon HD 6770M
GeForce GTX 660M
1478
Radeon HD 6770M
993
GeForce GTX 660M
Radeon HD 6770M
Architecture
Kepler (2012−2018)
Terascale 2 (2009−2015)
GPU code name
N13E-GE
Whistler-XT
Market segment
Laptop
Laptop
Release date
March 2012
January 2011
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
MXM-A (3.0)
SLI options
+
-
Boost clock speed
950 MHz
-
Core clock speed
835 MHz
675 / 725 MHz
CUDA cores
384
-
Floating-point performance
729.6 gflops
696.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
716 million
Pipelines / CUDA cores
384
480
Power consumption (TDP)
50 Watt
35 Watt
Texture fill rate
30.4 billion/sec
17.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128bit
128 Bit
Memory clock speed
2000 MHz
800 MHz
Memory bandwidth
64.0 GB/s
57.6 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
11.2 (11_0)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
N/A
Optimus
+
-