GeForce 940M vs GeForce GT 645M
When comparing GeForce 940M and GeForce GT 645M, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce 940M and GeForce GT 645M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
GeForce 940M and GeForce GT 645M are Laptop Graphics Cards
Note: GeForce 940M and GeForce GT 645M 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 940M or GeForce GT 645M here:
Main Specs
GeForce 940M
GeForce GT 645M
Power consumption (TDP)
75 Watt
32 Watt
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Memory type
DDR3
DDR3\GDDR5
Maximum RAM amount
4 GB
2 GB
Display Connectors
No outputs
No outputs
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GeForce 940M has 134% more power consumption, than GeForce GT 645M.
GeForce 940M is connected by PCIe 3.0 x8, and GeForce GT 645M uses PCIe 3.0 x16 interface.
GeForce 940M has 2 GB more memory, than GeForce GT 645M.
Both cards are used in Laptops.
GeForce 940M is build with Maxwell architecture, and GeForce GT 645M - with Kepler.
GeForce 940M and GeForce GT 645M are manufactured by 28 nm process technology.
Memory clock speed of GeForce 940M is 200 MHz higher, than GeForce GT 645M.
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
2−3
1−2
ultra / 1080p
1−2
0−1
QHD / 1440p
0−1
0−1
low / 720p
12−14
12−14
medium / 1080p
4−5
2−3
The average gaming FPS of GeForce 940M in Assassin's Creed Odyssey is 20% more, than GeForce GT 645M.
high / 1080p
6−7
−
ultra / 1080p
4−5
3−4
QHD / 1440p
0−1
0−1
low / 720p
16−18
12−14
medium / 1080p
6−7
4−5
The average gaming FPS of GeForce 940M in Battlefield 5 is 28% more, than GeForce GT 645M.
low / 768p
50−55
50−55
high / 1080p
40−45
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 645M in Call of Duty: Warzone is 6% more, than GeForce 940M.
low / 768p
120−130
110−120
medium / 768p
90−95
85−90
ultra / 1080p
40−45
35−40
QHD / 1440p
24−27
−
4K / 2160p
18−20
10−11
high / 768p
65−70
60−65
The average gaming FPS of GeForce 940M in Counter-Strike: Global Offensive is 11% more, than GeForce GT 645M.
low / 768p
70−75
70−75
ultra / 1080p
18−20
14−16
medium / 1080p
45−50
45−50
The average gaming FPS of GeForce 940M in Cyberpunk 2077 is 2% more, than GeForce GT 645M.
low / 768p
70−75
70−75
medium / 768p
50−55
45−50
ultra / 1080p
24−27
18−20
The average gaming FPS of GeForce 940M in Dota 2 is 8% more, than GeForce GT 645M.
high / 1080p
3−4
2−3
ultra / 1080p
3−4
2−3
4K / 2160p
2−3
0−1
low / 720p
12−14
10−11
medium / 1080p
4−5
3−4
The average gaming FPS of GeForce 940M in Far Cry 5 is 50% more, than GeForce GT 645M.
high / 1080p
10−11
−
ultra / 1080p
5−6
5−6
QHD / 1440p
2−3
1−2
low / 720p
50−55
45−50
medium / 1080p
12−14
8−9
The average gaming FPS of GeForce 940M in Fortnite is 20% more, than GeForce GT 645M.
high / 1080p
7−8
3−4
ultra / 1080p
6−7
−
QHD / 1440p
2−3
0−1
low / 720p
20−22
14−16
medium / 1080p
9−10
6−7
The average gaming FPS of GeForce 940M in Forza Horizon 4 is 50% more, than GeForce GT 645M.
low / 768p
45−50
40−45
medium / 768p
35−40
−
high / 1080p
6−7
3−4
ultra / 1080p
3−4
2−3
QHD / 1440p
0−1
0−1
medium / 720p
−
35−40
The average gaming FPS of GeForce 940M in Grand Theft Auto V is 18% more, than GeForce GT 645M.
high / 1080p
1−2
1−2
ultra / 1080p
0−1
0−1
4K / 2160p
0−1
0−1
low / 720p
6−7
3−4
medium / 1080p
3−4
2−3
The average gaming FPS of GeForce 940M in Metro Exodus is 50% more, than GeForce GT 645M.
low / 768p
90−95
85−90
high / 1080p
85−90
55−60
ultra / 1080p
75−80
−
medium / 1080p
90−95
−
The average gaming FPS of GeForce 940M in Minecraft is 25% more, than GeForce GT 645M.
high / 1080p
14−16
14−16
ultra / 1080p
12−14
12−14
low / 720p
24−27
24−27
medium / 1080p
16−18
14−16
GeForce 940M and GeForce GT 645M have the same average FPS in PLAYERUNKNOWN'S BATTLEGROUNDS.
ultra / 1080p
4−5
3−4
QHD / 1440p
0−1
0−1
low / 720p
5−6
4−5
The average gaming FPS of GeForce 940M in Red Dead Redemption 2 is 25% more, than GeForce GT 645M.
low / 768p
14−16
8−9
medium / 768p
10−11
7−8
high / 1080p
5−6
3−4
ultra / 1080p
4−5
3−4
4K / 2160p
1−2
0−1
The average gaming FPS of GeForce 940M in The Witcher 3: Wild Hunt is 60% more, than GeForce GT 645M.
low / 768p
75−80
70−75
medium / 768p
40−45
35−40
ultra / 1080p
14−16
12−14
high / 768p
30−35
30−33
The average gaming FPS of GeForce 940M in World of Tanks is 7% more, than GeForce GT 645M.
Full Specs
GeForce 940M
GeForce GT 645M
Architecture
Maxwell
Kepler
Code name
N16S-GT-S/B
N13P-GS
Type
Laptop
Laptop
Release date
12 March 2015
22 March 2012
Pipelines
384
384
Core clock speed
1072 MHz
Boost Clock
1176 MHz
Transistor count
1,870 million
1,270 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
28.22
22.7 billion/sec
Floating-point performance
903.2 gflops
544.5 gflops
Memory bus width
64 Bit
128bit
Memory clock speed
2000 MHz
1800 MHz
Memory bandwidth
14.4 GB/s
Shared memory
-
-
DirectX
12 (11_0)
12 API
Shader Model
5.1
5.1
OpenGL
4.5
4.5
OpenCL
1.2
1.1
Vulkan
1.1.126
1.1.126
CUDA
+
+
CUDA cores
384
Bus support
PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
101 Mh/s
19 Mh/s
Laptop size
medium sized
medium sized
Optimus
+
+
GPU Boost
2.0
GameWorks
+
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