GeForce GTX 680 and GeForce GT 640M LE - video card comparison
Passmark - benchmark score GeForce GTX 680 vs GeForce GT 640M LE
GeForce GTX 680
5721
GeForce GT 640M LE
720
GeForce GTX 680
GeForce GT 640M LE
Architecture
Kepler (2012−2018)
Fermi / Kepler (2012)
GPU code name
GK104
N13P-LP
Market segment
Desktop
Laptop
Release date
March 2012
March 2012
Bus support
PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
Two 6-pin
-
SLI options
+
-
Boost clock speed
1058 MHz
-
Core clock speed
1006 MHz
Up to 500 MHz
CUDA cores
1536
Up to 384
Floating-point performance
3,090.4 gflops
384.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
585 million
Pipelines / CUDA cores
1536
384
Power consumption (TDP)
195 Watt
20 Watt
Texture fill rate
128.8 billion/sec
Up to 16.0 billion/sec
Memory type
GDDR5
DDR3\DDR5
Maximum RAM amount
2048 MB
2 GB
Memory bus width
256-bit GDDR5
128bit
Memory clock speed
6000 MHz
1800 - 4000 MHz
Memory bandwidth
192.2 GB/s
Up to 28.8 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
Up to 2048x1536
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 API
CUDA
+
+
OpenCL
1.2
1.1
OpenGL
4.2
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
N/A
3D Blu-Ray
-
+
Optimus
-
+