GeForce GTX 1080 and GeForce GT 645 OEM - video card comparison
GeForce GTX 1080
GeForce GT 645 OEM
Architecture
Pascal (2016−2021)
Fermi 2.0 (2010−2014)
GPU code name
Pascal GP104
GF114
Market segment
Desktop
Desktop
Release date
May 2016
April 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Recommended system power (PSU)
500 Watt
-
Supplementary power connectors
8-pin
-
SLI options
+
-
Boost clock speed
1733 MHz
-
Core clock speed
1607 MHz
776 MHz
CUDA cores
2560
-
Floating-point performance
8,873 gflops
894.0 gflops
Manufacturing process technology
16 nm
40 nm
Number of transistors
7,200 million
1,950 million
Pipelines / CUDA cores
2560
288
Power consumption (TDP)
180 Watt
102 Watt
Maximum GPU temperature
94 °C
-
Texture fill rate
277.3
37.25
Memory type
GDDR5X
GDDR5
Maximum RAM amount
8 GB
1 GB
Memory bus width
256 Bit
192 Bit
Memory clock speed
10 GB/s
3828 MHz
Memory bandwidth
320 GB/s
91.87 GB/s
Shared memory
-
-
Display Connectors
DP 1.42, HDMI 2.0b, DL-DVI
2x DVI, 1x mini-HDMI
Multi monitor support
+
-
HDMI
+
+
G-SYNC support
+
-
DirectX
12 (12_1)
12 (11_0)
CUDA
+
2.1
OpenCL
1.2
1.1
OpenGL
4.5
4.6
Shader Model
6.4
5.1
Vulkan
1.2.131
N/A
Ansel
+
-
GPU Boost
3.0
-
VR Ready
+
-