GeForce 840M and GeForce 8400M GS - video card comparison
Passmark - benchmark score GeForce 840M vs GeForce 8400M GS
GeForce 840M
1121
GeForce 8400M GS
112
GeForce 840M
GeForce 8400M GS
Architecture
Maxwell (2014−2018)
Tesla (2006−2010)
GPU code name
N15S-GT
G86M
Market segment
Laptop
Laptop
Release date
March 2014
May 2007
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x8
MXM-I
Boost clock speed
1124 MHz
-
Core clock speed
1029 MHz
400 MHz
Floating-point performance
863.2 gflops
25.6 gflops
Manufacturing process technology
28 nm
80 nm
Number of transistors
-
210 million
Pipelines / CUDA cores
384
16
Power consumption (TDP)
33 Watt
11 Watt
Texture fill rate
17.98
3.200
Memory type
DDR3
GDDR2 / GDDR3
Maximum RAM amount
4 GB
256 MB
Memory bus width
64 Bit
64 Bit
Memory clock speed
2000 MHz
600 MHz
Memory bandwidth
16.02 GB/s
6.4 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
11.1 (10_0)
CUDA
+
1.1
OpenCL
1.2
1.1
OpenGL
4.5
3.3
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-