GeForce GTX 680M and Radeon HD 8550M - video card comparison
GeForce GTX 680M
Radeon HD 8550M
Architecture
Kepler (2012−2018)
GCN (2011−2017)
GPU code name
N13E-GTX
Sun
Market segment
Laptop
Laptop
Release date
June 2012
November 2012
Bus support
PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 3.0 x8
Supplementary power connectors
None
-
SLI options
+
-
Boost clock speed
758 MHz
850 MHz
Core clock speed
720 MHz
700 MHz
CUDA cores
1344
-
Floating-point performance
2,038 gflops
544.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
690 million
Pipelines / CUDA cores
1344
384
Power consumption (TDP)
100 Watt
-
Texture fill rate
80.6 billion/sec
17.00
Memory type
GDDR5
DDR3
Maximum RAM amount
4 GB
1 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
1800 MHz
1800 MHz
Memory bandwidth
115.2 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
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
+
-