GeForce GT 645M vs Radeon RX Vega 3
If you are going to buy a new graphics card and are choosing between GeForce GT 645M and Radeon RX Vega 3, 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 Radeon RX Vega 3, check out specs charts below.
GeForce GT 645M and Radeon RX Vega 3 are Laptop Graphics Cards
Note: GeForce GT 645M and Radeon RX Vega 3 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 Radeon RX Vega 3 here:
Main Specs
GeForce GT 645M
Radeon RX Vega 3
Power consumption (TDP)
32 Watt
Interface
PCIe 3.0 x16
Memory type
DDR3\GDDR5
Maximum RAM amount
2 GB
Display Connectors
No outputs
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Both cards are used in Laptops.
GeForce GT 645M is build with Kepler architecture, and Radeon RX Vega 3 - with Vega.
GeForce GT 645M is manufactured by 28 nm process technology, and Radeon RX Vega 3 - 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
1−2
QHD / 1440p
0−1
0−1
low / 720p
12−14
14−16
medium / 1080p
2−3
4−5
The average gaming FPS of Radeon RX Vega 3 in Assassin's Creed Odyssey is 40% more, than GeForce GT 645M.
high / 1080p
−
7−8
ultra / 1080p
3−4
5−6
QHD / 1440p
0−1
0−1
low / 720p
12−14
18−20
medium / 1080p
4−5
7−8
The average gaming FPS of Radeon RX Vega 3 in Battlefield 5 is 42% more, than GeForce GT 645M.
low / 768p
50−55
50−55
high / 1080p
45−50
30−35
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 645M in Call of Duty: Warzone is 19% more, than Radeon RX Vega 3.
low / 768p
110−120
110−120
medium / 768p
85−90
90−95
ultra / 1080p
35−40
40−45
QHD / 1440p
−
24−27
4K / 2160p
10−11
18−20
high / 768p
60−65
65−70
The average gaming FPS of Radeon RX Vega 3 in Counter-Strike: Global Offensive is 8% more, than GeForce GT 645M.
low / 768p
70−75
70−75
ultra / 1080p
14−16
21−24
medium / 1080p
45−50
45−50
The average gaming FPS of Radeon RX Vega 3 in Cyberpunk 2077 is 4% more, than GeForce GT 645M.
low / 768p
70−75
70−75
medium / 768p
45−50
50−55
ultra / 1080p
18−20
27−30
The average gaming FPS of Radeon RX Vega 3 in Dota 2 is 10% more, than GeForce GT 645M.
high / 1080p
2−3
3−4
ultra / 1080p
2−3
3−4
4K / 2160p
0−1
2−3
low / 720p
10−11
14−16
medium / 1080p
3−4
4−5
The average gaming FPS of Radeon RX Vega 3 in Far Cry 5 is 50% more, than GeForce GT 645M.
high / 1080p
−
10−12
ultra / 1080p
5−6
5−6
QHD / 1440p
1−2
2−3
low / 720p
45−50
50−55
medium / 1080p
8−9
14−16
The average gaming FPS of Radeon RX Vega 3 in Fortnite is 20% more, than GeForce GT 645M.
high / 1080p
3−4
6−7
QHD / 1440p
0−1
4−5
4K / 2160p
−
2−3
low / 720p
14−16
21−24
medium / 1080p
6−7
9−10
The average gaming FPS of Radeon RX Vega 3 in Forza Horizon 4 is 50% more, than GeForce GT 645M.
low / 768p
40−45
45−50
medium / 768p
−
40−45
high / 1080p
3−4
7−8
ultra / 1080p
2−3
3−4
QHD / 1440p
0−1
0−1
medium / 720p
35−40
−
The average gaming FPS of Radeon RX Vega 3 in Grand Theft Auto V is 18% more, than GeForce GT 645M.
high / 1080p
1−2
2−3
ultra / 1080p
0−1
0−1
4K / 2160p
0−1
0−1
low / 720p
3−4
8−9
medium / 1080p
2−3
4−5
The average gaming FPS of Radeon RX Vega 3 in Metro Exodus is 150% more, than GeForce GT 645M.
low / 768p
85−90
80−85
high / 1080p
55−60
−
ultra / 1080p
−
70−75
The average gaming FPS of GeForce GT 645M in Minecraft is 6% more, than Radeon RX Vega 3.
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 Radeon RX Vega 3 in PLAYERUNKNOWN'S BATTLEGROUNDS is 5% more, than GeForce GT 645M.
ultra / 1080p
3−4
6−7
QHD / 1440p
0−1
−
low / 720p
4−5
8−9
medium / 1080p
−
7−8
The average gaming FPS of Radeon RX Vega 3 in Red Dead Redemption 2 is 75% more, than GeForce GT 645M.
low / 768p
8−9
16−18
medium / 768p
7−8
10−12
high / 1080p
3−4
6−7
ultra / 1080p
3−4
4−5
4K / 2160p
0−1
2−3
The average gaming FPS of Radeon RX Vega 3 in The Witcher 3: Wild Hunt is 80% more, than GeForce GT 645M.
low / 768p
70−75
70−75
medium / 768p
35−40
35−40
ultra / 1080p
12−14
16−18
high / 768p
30−33
30−35
The average gaming FPS of Radeon RX Vega 3 in World of Tanks is 2% more, than GeForce GT 645M.
Full Specs
GeForce GT 645M
Radeon RX Vega 3
Architecture
Kepler
Vega
Code name
N13P-GS
Vega Raven Ridge
Type
Laptop
Laptop
Release date
22 March 2012
7 January 2018
Pipelines
384
192
Boost Clock
1000 MHz
Transistor count
1,270 million
Manufacturing process technology
28 nm
14 nm
Texture fill rate
22.7 billion/sec
Floating-point performance
544.5 gflops
Memory bus width
128bit
Memory clock speed
1800 MHz
Shared memory
-
-
DirectX
12 API
DirectX 12_1
Shader Model
5.1
OpenGL
4.5
OpenCL
1.1
Vulkan
1.1.126
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
+
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