GeForce 840M and Radeon HD 8650M - video card comparison
GeForce 840M
Radeon HD 8650M
Architecture
Maxwell (2014−2018)
GCN (2011−2017)
GPU code name
N15S-GT
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Market segment
Laptop
Laptop
Release date
March 2014
January 2013
Bus support
PCI Express 2.0, PCI Express 3.0
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Interface
PCIe 3.0 x8
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Boost clock speed
1124 MHz
-
Core clock speed
1029 MHz
650 MHz
Floating-point performance
863.2 gflops
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Manufacturing process technology
28 nm
28 nm
Number of transistors
-
900 Million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
33 Watt
-
Texture fill rate
17.98
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Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
64 Bit
64 Bit
Memory clock speed
2000 MHz
4500 MHz
Memory bandwidth
16.02 GB/s
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Shared memory
-
-
Display Connectors
No outputs
-
DirectX
12 (11_0)
11.1
CUDA
+
-
OpenCL
1.2
-
OpenGL
4.5
-
Shader Model
5.1
-
Vulkan
1.1.126
-
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
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