GeForce GT 640 Rev. 2 and UHD Graphics 770 - video card comparison
GeForce GT 640 Rev. 2
UHD Graphics 770
Architecture
Kepler 2.0 (2013−2015)
Alder Lake
GPU code name
GK208
Alder Lake xG
Market segment
Desktop
Desktop
Release date
May 2013
January 2022
Interface
PCIe 2.0 x8
Ring Bus
Supplementary power connectors
None
-
Boost clock speed
-
300 MHz
Core clock speed
1046 MHz
-
Floating-point performance
803.3 gflops
-
Manufacturing process technology
28 nm
10 nm
Number of transistors
915 million
-
Pipelines / CUDA cores
384
32
Power consumption (TDP)
49 Watt
15 Watt
Texture fill rate
33.47
26.40
Memory type
GDDR5
System Shared
Maximum RAM amount
1 GB
System Shared
Memory bus width
64 Bit
System Shared
Memory clock speed
5008 MHz
1550 MHz
Memory bandwidth
40.06 GB/s
-
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x VGA
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 (12_1)
CUDA
3.5
-
OpenCL
1.2
3.0
OpenGL
4.6
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
1.3