GeForce 840M vs GeForce GTX 660 Ti
When choosing between GeForce 840M and GeForce GTX 660 Ti, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce 840M and GeForce GTX 660 Ti.
GeForce 840M is a Laptop Graphics Card
Note: GeForce 840M is only used in laptop graphics. It has 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 840M here:
Main Specs
GeForce 840M
GeForce GTX 660 Ti
Power consumption (TDP)
33 Watt
150 Watt
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
Two 6-pin
Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
2 GB
Display Connectors
No outputs
2x DVI, 1x HDMI, 1x DisplayPort
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GeForce GTX 660 Ti has 354% more power consumption, than GeForce 840M.
GeForce 840M is connected by PCIe 3.0 x8, and GeForce GTX 660 Ti uses PCIe 3.0 x16 interface.
GeForce 840M has 2 GB more memory, than GeForce GTX 660 Ti.
GeForce 840M is used in Laptops, and GeForce GTX 660 Ti - in Desktops.
GeForce 840M is build with Maxwell architecture, and GeForce GTX 660 Ti - with Kepler.
Core clock speed of GeForce 840M is 114 MHz higher, than GeForce GTX 660 Ti.
GeForce 840M and GeForce GTX 660 Ti are manufactured by 28 nm process technology.
Memory clock speed of GeForce 840M is 1994 MHz higher, than GeForce GTX 660 Ti.
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
21−24
ultra / 1080p
0−1
12−14
QHD / 1440p
0−1
8−9
4K / 2160p
−
5−6
low / 720p
12−14
40−45
medium / 1080p
3−4
27−30
The average gaming FPS of GeForce GTX 660 Ti in Assassin's Creed Odyssey is 416% more, than GeForce 840M.
high / 1080p
−
35−40
ultra / 1080p
4−5
30−35
QHD / 1440p
0−1
14−16
4K / 2160p
−
9−10
low / 720p
16−18
70−75
medium / 1080p
5−6
40−45
The average gaming FPS of GeForce GTX 660 Ti in Battlefield 5 is 444% more, than GeForce 840M.
low / 768p
45−50
50−55
high / 1080p
40−45
−
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GTX 660 Ti in Call of Duty: Warzone is 10% more, than GeForce 840M.
low / 768p
120−130
230−240
medium / 768p
90−95
210−220
ultra / 1080p
40−45
120−130
QHD / 1440p
24−27
100−110
4K / 2160p
18−20
55−60
high / 768p
65−70
170−180
The average gaming FPS of GeForce GTX 660 Ti in Counter-Strike: Global Offensive is 145% more, than GeForce 840M.
low / 768p
85−90
60−65
ultra / 1080p
16−18
55−60
medium / 1080p
40−45
55−60
The average gaming FPS of GeForce GTX 660 Ti in Cyberpunk 2077 is 20% more, than GeForce 840M.
low / 768p
75−80
120−130
medium / 768p
50−55
110−120
ultra / 1080p
24−27
85−90
The average gaming FPS of GeForce GTX 660 Ti in Dota 2 is 113% more, than GeForce 840M.
high / 1080p
2−3
27−30
ultra / 1080p
2−3
24−27
QHD / 1440p
−
20−22
4K / 2160p
0−1
9−10
low / 720p
12−14
55−60
medium / 1080p
3−4
30−33
The average gaming FPS of GeForce GTX 660 Ti in Far Cry 5 is 600% more, than GeForce 840M.
high / 1080p
10−11
35−40
ultra / 1080p
5−6
27−30
QHD / 1440p
2−3
16−18
low / 720p
50−55
130−140
medium / 1080p
10−12
75−80
The average gaming FPS of GeForce GTX 660 Ti in Fortnite is 268% more, than GeForce 840M.
high / 1080p
4−5
35−40
ultra / 1080p
−
27−30
QHD / 1440p
0−1
16−18
4K / 2160p
−
14−16
low / 720p
16−18
75−80
medium / 1080p
7−8
40−45
The average gaming FPS of GeForce GTX 660 Ti in Forza Horizon 4 is 477% more, than GeForce 840M.
low / 768p
45−50
110−120
medium / 768p
−
95−100
high / 1080p
5−6
45−50
ultra / 1080p
2−3
18−20
QHD / 1440p
0−1
9−10
medium / 720p
35−40
−
The average gaming FPS of GeForce GTX 660 Ti in Grand Theft Auto V is 233% more, than GeForce 840M.
high / 1080p
1−2
14−16
ultra / 1080p
0−1
10−12
QHD / 1440p
−
10−12
4K / 2160p
0−1
3−4
low / 720p
5−6
40−45
medium / 1080p
3−4
20−22
The average gaming FPS of GeForce GTX 660 Ti in Metro Exodus is 766% more, than GeForce 840M.
low / 768p
90−95
120−130
high / 1080p
85−90
−
ultra / 1080p
70−75
−
medium / 1080p
90−95
110−120
The average gaming FPS of GeForce GTX 660 Ti in Minecraft is 30% more, than GeForce 840M.
ultra / 1080p
12−14
14−16
low / 720p
27−30
75−80
medium / 1080p
14−16
18−20
The average gaming FPS of GeForce GTX 660 Ti in PLAYERUNKNOWN'S BATTLEGROUNDS is 105% more, than GeForce 840M.
high / 1080p
−
16−18
ultra / 1080p
4−5
10−12
QHD / 1440p
0−1
3−4
4K / 2160p
−
2−3
low / 720p
6−7
40−45
medium / 1080p
−
21−24
The average gaming FPS of GeForce GTX 660 Ti in Red Dead Redemption 2 is 420% more, than GeForce 840M.
low / 768p
12−14
80−85
medium / 768p
9−10
50−55
high / 1080p
4−5
27−30
ultra / 1080p
3−4
16−18
4K / 2160p
0−1
9−10
The average gaming FPS of GeForce GTX 660 Ti in The Witcher 3: Wild Hunt is 542% more, than GeForce 840M.
low / 768p
75−80
90−95
medium / 768p
35−40
60−65
ultra / 1080p
16−18
40−45
high / 768p
30−35
55−60
The average gaming FPS of GeForce GTX 660 Ti in World of Tanks is 53% more, than GeForce 840M.
Full Specs
GeForce 840M
GeForce GTX 660 Ti
Architecture
Maxwell
Kepler
Code name
N15S-GT
GK104
Type
Laptop
Desktop
Release date
12 March 2014
16 August 2012
Pipelines
384
1344
Core clock speed
1029 MHz
915 MHz
Boost Clock
1124 MHz
980 MHz
Transistor count
3,540 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
17.98
102.5 billion/sec
Floating-point performance
863.2 gflops
2,459.5 gflops
Length
9.5" (24.1 cm)
Memory bus width
64 Bit
192-bit GDDR5
Memory clock speed
2000 MHz
6.0 GB/s
Memory bandwidth
16.02 GB/s
144.2 GB/s
Shared memory
-
-
DirectX
12 (11_0)
12 (11_0)
Shader Model
5.1
5.1
OpenGL
4.5
4.3
OpenCL
1.2
1.2
Vulkan
1.1.126
1.1.126
CUDA
+
+
CUDA cores
1344
Bus support
PCI Express 2.0, PCI Express 3.0
PCI Express 3.0
Height
4.376" (11.1 cm)
SLI options
+
Multi monitor support
4 displays
HDMI
+
HDCP
+
Maximum VGA resolution
2048x1536
Audio input for HDMI
Internal
3D Blu-Ray
+
3D Gaming
+
3D Vision
+
Bitcoin / BTC (SHA256)
92 Mh/s
99 Mh/s
Laptop size
medium sized
Optimus
+
GPU Boost
2.0
GameWorks
+
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