GeForce GTX 680 and GeForce 840M - video card comparison
Passmark - benchmark score GeForce GTX 680 vs GeForce 840M
GeForce GTX 680
5721
GeForce 840M
1121
GeForce GTX 680
GeForce 840M
Architecture
Kepler (2012−2018)
Maxwell (2014−2018)
GPU code name
GK104
N15S-GT
Market segment
Desktop
Laptop
Release date
March 2012
March 2014
Bus support
PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
Two 6-pin
-
SLI options
+
-
Boost clock speed
1058 MHz
1124 MHz
Core clock speed
1006 MHz
1029 MHz
CUDA cores
1536
-
Floating-point performance
3,090.4 gflops
863.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
-
Pipelines / CUDA cores
1536
384
Power consumption (TDP)
195 Watt
33 Watt
Texture fill rate
128.8 billion/sec
17.98
Memory type
GDDR5
DDR3
Maximum RAM amount
2048 MB
4 GB
Memory bus width
256-bit GDDR5
64 Bit
Memory clock speed
6000 MHz
2000 MHz
Memory bandwidth
192.2 GB/s
16.02 GB/s
Shared memory
-
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
No outputs
Multi monitor support
4 displays
-
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 (11_0)
CUDA
+
+
OpenCL
1.2
1.2
OpenGL
4.2
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
GameWorks
-
+
GPU Boost
-
2.0
Optimus
-
+