GeForce 840M and Radeon HD 8550G + HD 8670M Dual Graphics - video card comparison
GeForce 840M
Radeon HD 8550G + HD 8670M Dual Graphics
Architecture
Maxwell (2014−2018)
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GPU code name
N15S-GT
-
Market segment
Laptop
Laptop
Release date
March 2014
August 2013
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x8
-
Boost clock speed
1124 MHz
-
Core clock speed
1029 MHz
720 / 975 MHz
Floating-point performance
863.2 gflops
-
Manufacturing process technology
28 nm
28 nm
Pipelines / CUDA cores
384
640
Power consumption (TDP)
33 Watt
-
Texture fill rate
17.98
-
Memory type
DDR3
DDR3
Maximum RAM amount
4 GB
-
Memory bus width
64 Bit
64 Bit
Memory clock speed
2000 MHz
2000 MHz
Memory bandwidth
16.02 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
-
DirectX
12 (11_0)
11
CUDA
+
-
OpenCL
1.2
-
OpenGL
4.5
-
Shader Model
5.1
-
Vulkan
1.1.126
-
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-