GeForce 840M and Radeon HD 8950M - video card comparison
GeForce 840M
Radeon HD 8950M
Architecture
Maxwell (2014−2018)
GCN 2.0 (2013−2017)
GPU code name
N15S-GT
Saturn
Market segment
Laptop
Desktop
Release date
March 2014
May 2013
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Boost clock speed
1124 MHz
-
Core clock speed
1029 MHz
1075 MHz
Floating-point performance
863.2 gflops
1,651 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
-
2,080 million
Pipelines / CUDA cores
384
768
Power consumption (TDP)
33 Watt
100 Watt
Texture fill rate
17.98
51.60
Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
2000 MHz
5500 MHz
Memory bandwidth
16.02 GB/s
88 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (12_0)
CUDA
+
-
OpenCL
1.2
2.0
OpenGL
4.5
4.6
Shader Model
5.1
6.3
Vulkan
1.1.126
1.2.131
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-