GeForce GTX 670MX and GeForce 840M - video card comparison
Passmark - benchmark score GeForce GTX 670MX vs GeForce 840M
GeForce GTX 670MX
2005
GeForce 840M
1121
GeForce GTX 670MX
GeForce 840M
Architecture
Kepler (2012−2018)
Maxwell (2014−2018)
GPU code name
N13E-GR
N15S-GT
Market segment
Laptop
Laptop
Release date
October 2012
March 2014
Bus support
PCI Express 2.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
SLI options
+
-
Boost clock speed
-
1124 MHz
Core clock speed
600 MHz
1029 MHz
CUDA cores
960
-
Floating-point performance
1,154 gflops
863.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
-
Pipelines / CUDA cores
960
384
Power consumption (TDP)
75 Watt
33 Watt
Texture fill rate
48.0 billion/sec
17.98
Memory type
GDDR5
DDR3
Maximum RAM amount
3 GB
4 GB
Memory bus width
192 Bit
64 Bit
Memory clock speed
1400 MHz
2000 MHz
Memory bandwidth
67.2 GB/s
16.02 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 (11_0)
CUDA
+
+
OpenCL
1.1
1.2
OpenGL
4.5
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
GameWorks
-
+
GPU Boost
-
2.0
Optimus
+
+