GeForce GTX 1080 and GeForce GT 640M - video card comparison
Passmark - benchmark score GeForce GTX 1080 vs GeForce GT 640M
GeForce GTX 1080
16002
GeForce GT 640M
943
GeForce GTX 1080
GeForce GT 640M
Architecture
Pascal (2016−2021)
Kepler (2012−2018)
GPU code name
Pascal GP104
N13P-GS
Market segment
Desktop
Laptop
Release date
May 2016
March 2012
Bus support
PCIe 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Recommended system power (PSU)
500 Watt
-
Supplementary power connectors
8-pin
-
SLI options
+
-
Boost clock speed
1733 MHz
645 MHz
Core clock speed
1607 MHz
Up to 625 MHz
CUDA cores
2560
384
Floating-point performance
8,873 gflops
480.0 gflops
Manufacturing process technology
16 nm
28 nm
Number of transistors
7,200 million
1,270 million
Pipelines / CUDA cores
2560
384
Power consumption (TDP)
180 Watt
32 Watt
Maximum GPU temperature
94 °C
-
Texture fill rate
277.3
Up to 20.0 billion/sec
Memory type
GDDR5X
DDR3\GDDR5
Maximum RAM amount
8 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
10 GB/s
1800 - 4000 MHz
Memory bandwidth
320 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
DP 1.42, HDMI 2.0b, DL-DVI
No outputs
Multi monitor support
+
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
G-SYNC support
+
-
DirectX
12 (12_1)
12 API
CUDA
+
+
OpenCL
1.2
1.1
OpenGL
4.5
4.5
Shader Model
6.4
5.1
Vulkan
1.2.131
1.1.126
3D Blu-Ray
-
+
Ansel
+
-
GPU Boost
3.0
-
Optimus
-
+
VR Ready
+
-