GeForce GT 645M vs UHD Graphics 620
If you are going to buy a new graphics card and are choosing between GeForce GT 645M and UHD Graphics 620, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GT 645M stacks up against UHD Graphics 620, check out specs charts below.
GeForce GT 645M and UHD Graphics 620 are Laptop Graphics Cards
Note: GeForce GT 645M and UHD Graphics 620 are only used in laptop graphics. They have lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with GeForce GT 645M or UHD Graphics 620 here:
Main Specs
GeForce GT 645M
UHD Graphics 620
Power consumption (TDP)
32 Watt
15 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x1
Memory type
DDR3\GDDR5
LPDDR3/DDR4
Maximum RAM amount
2 GB
32 GB
Display Connectors
No outputs
No outputs
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GeForce GT 645M has 113% more power consumption, than UHD Graphics 620.
GeForce GT 645M is connected by PCIe 3.0 x16, and UHD Graphics 620 uses PCIe 3.0 x1 interface.
UHD Graphics 620 has 30 GB more memory, than GeForce GT 645M.
Both cards are used in Laptops.
GeForce GT 645M is build with Kepler architecture, and UHD Graphics 620 - with Gen. 9.5.
GeForce GT 645M is manufactured by 28 nm process technology, and UHD Graphics 620 - by 14 nm process technology.
Game benchmarks
Assassin's Creed Odyssey
Battlefield 5
Call of Duty: Warzone
Counter-Strike: Global Offensive
Cyberpunk 2077
Dota 2
Far Cry 5
Fortnite
Forza Horizon 4
Grand Theft Auto V
Metro Exodus
Minecraft
PLAYERUNKNOWN'S BATTLEGROUNDS
Red Dead Redemption 2
The Witcher 3: Wild Hunt
World of Tanks
high / 1080p
1−2
2−3
ultra / 1080p
0−1
0−1
QHD / 1440p
0−1
0−1
low / 720p
12−14
12−14
medium / 1080p
2−3
3−4
The average gaming FPS of UHD Graphics 620 in Assassin's Creed Odyssey is 20% more, than GeForce GT 645M.
high / 1080p
−
6−7
ultra / 1080p
3−4
4−5
QHD / 1440p
0−1
0−1
low / 720p
12−14
16−18
medium / 1080p
4−5
6−7
The average gaming FPS of UHD Graphics 620 in Battlefield 5 is 28% more, than GeForce GT 645M.
low / 768p
50−55
45−50
high / 1080p
45−50
40−45
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 645M in Call of Duty: Warzone is 11% more, than UHD Graphics 620.
low / 768p
110−120
100−110
medium / 768p
85−90
80−85
ultra / 1080p
35−40
40−45
QHD / 1440p
−
21−24
4K / 2160p
10−11
16−18
high / 768p
60−65
60−65
The average gaming FPS of GeForce GT 645M in Counter-Strike: Global Offensive is 1% more, than UHD Graphics 620.
low / 768p
70−75
85−90
ultra / 1080p
14−16
18−20
medium / 1080p
45−50
40−45
The average gaming FPS of UHD Graphics 620 in Cyberpunk 2077 is 8% more, than GeForce GT 645M.
low / 768p
70−75
80−85
medium / 768p
45−50
55−60
ultra / 1080p
18−20
27−30
The average gaming FPS of UHD Graphics 620 in Dota 2 is 21% more, than GeForce GT 645M.
high / 1080p
2−3
2−3
ultra / 1080p
2−3
2−3
4K / 2160p
0−1
1−2
low / 720p
10−11
12−14
medium / 1080p
3−4
3−4
The average gaming FPS of UHD Graphics 620 in Far Cry 5 is 25% more, than GeForce GT 645M.
high / 1080p
−
10−11
ultra / 1080p
5−6
5−6
QHD / 1440p
1−2
1−2
low / 720p
45−50
50−55
medium / 1080p
8−9
12−14
The average gaming FPS of UHD Graphics 620 in Fortnite is 20% more, than GeForce GT 645M.
high / 1080p
3−4
5−6
QHD / 1440p
0−1
3−4
4K / 2160p
−
2−3
low / 720p
14−16
16−18
medium / 1080p
6−7
8−9
The average gaming FPS of UHD Graphics 620 in Forza Horizon 4 is 25% more, than GeForce GT 645M.
low / 768p
40−45
40−45
medium / 768p
−
35−40
high / 1080p
3−4
5−6
ultra / 1080p
2−3
3−4
QHD / 1440p
0−1
0−1
medium / 720p
35−40
−
The average gaming FPS of UHD Graphics 620 in Grand Theft Auto V is 6% more, than GeForce GT 645M.
high / 1080p
1−2
1−2
ultra / 1080p
0−1
0−1
4K / 2160p
0−1
−
low / 720p
3−4
5−6
medium / 1080p
2−3
3−4
The average gaming FPS of UHD Graphics 620 in Metro Exodus is 50% more, than GeForce GT 645M.
low / 768p
85−90
95−100
high / 1080p
55−60
60−65
medium / 1080p
−
85−90
The average gaming FPS of UHD Graphics 620 in Minecraft is 11% more, than GeForce GT 645M.
high / 1080p
14−16
−
ultra / 1080p
12−14
12−14
low / 720p
24−27
27−30
medium / 1080p
14−16
14−16
The average gaming FPS of UHD Graphics 620 in PLAYERUNKNOWN'S BATTLEGROUNDS is 5% more, than GeForce GT 645M.
ultra / 1080p
3−4
4−5
QHD / 1440p
0−1
0−1
low / 720p
4−5
4−5
GeForce GT 645M and UHD Graphics 620 have the same average FPS in Red Dead Redemption 2.
low / 768p
8−9
12−14
medium / 768p
7−8
9−10
high / 1080p
3−4
4−5
ultra / 1080p
3−4
3−4
4K / 2160p
0−1
0−1
The average gaming FPS of UHD Graphics 620 in The Witcher 3: Wild Hunt is 40% more, than GeForce GT 645M.
low / 768p
70−75
65−70
medium / 768p
35−40
35−40
ultra / 1080p
12−14
14−16
high / 768p
30−33
27−30
The average gaming FPS of GeForce GT 645M in World of Tanks is 2% more, than UHD Graphics 620.
Full Specs
GeForce GT 645M
UHD Graphics 620
Architecture
Kepler
Gen. 9.5
Code name
N13P-GS
Kaby-Lake-Refresh GT2
Type
Laptop
Laptop
Release date
22 March 2012
1 September 2017
Pipelines
384
24
Core clock speed
300 MHz
Boost Clock
1150 MHz
Transistor count
1,270 million
189 million
Manufacturing process technology
28 nm
14 nm
Texture fill rate
22.7 billion/sec
27.60
Floating-point performance
544.5 gflops
Memory bus width
128bit
64/128 Bit
Memory clock speed
1800 MHz
Shared memory
-
+
DirectX
12 API
12 (12_1)
Shader Model
5.1
6.4
OpenGL
4.5
4.6
OpenCL
1.1
2.1
Vulkan
1.1.126
1.1.103
CUDA
+
CUDA cores
384
Bus support
PCI Express 2.0, PCI Express 3.0
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
19 Mh/s
Laptop size
medium sized
Optimus
+
Quick Sync
+
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