GeForce GTX 560 Ti X2 and GeForce 840M - video card comparison
GeForce GTX 560 Ti X2
GeForce 840M
Architecture
Fermi 2.0 (2010−2014)
Maxwell (2014−2018)
GPU code name
GF114
N15S-GT
Market segment
Desktop
Laptop
Release date
January 2011
March 2014
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x8
Supplementary power connectors
2x 8-pin
-
Boost clock speed
-
1124 MHz
Core clock speed
850 MHz
1029 MHz
Floating-point performance
2x 1,305.6 gflops
863.2 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,950 million
-
Pipelines / CUDA cores
384
384
Power consumption (TDP)
170 Watt
33 Watt
Texture fill rate
54.40
17.98
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
4008 MHz
2000 MHz
Memory bandwidth
128.3 GB/s
16.02 GB/s
Shared memory
-
-
Display Connectors
3x DVI, 1x mini-HDMI
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 (11_0)
CUDA
2.1
+
OpenCL
1.1
1.2
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
N/A
1.1.126
GameWorks
-
+
GPU Boost
-
2.0
Optimus
-
+