GeForce 840M vs Quadro K420
If you are going to buy a new graphics card and are choosing between GeForce 840M and Quadro K420, 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 840M stacks up against Quadro K420, check out specs charts below.
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
Quadro K420
Power consumption (TDP)
33 Watt
41 Watt
Interface
PCIe 3.0 x8
PCIe 2.0 x16
Supplementary power connectors
None
Memory type
DDR3
128 Bit
Maximum RAM amount
4 GB
1 GB/2 GB
Display Connectors
No outputs
1x DVI, 1x DisplayPort
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Quadro K420 has 24% more power consumption, than GeForce 840M.
GeForce 840M is connected by PCIe 3.0 x8, and Quadro K420 uses PCIe 2.0 x16 interface.
GeForce 840M has 3 GB more memory, than Quadro K420.
GeForce 840M is used in Laptops, and Quadro K420 - in Desktops.
GeForce 840M is build with Maxwell architecture, and Quadro K420 - with Kepler.
Core clock speed of GeForce 840M is 153 MHz higher, than Quadro K420.
GeForce 840M and Quadro K420 are manufactured by 28 nm process technology.
Memory clock speed of GeForce 840M is 218 MHz higher, than Quadro K420.
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
0−1
ultra / 1080p
0−1
0−1
QHD / 1440p
0−1
0−1
low / 720p
12−14
9−10
medium / 1080p
3−4
1−2
The average gaming FPS of GeForce 840M in Assassin's Creed Odyssey is 60% more, than Quadro K420.
ultra / 1080p
4−5
1−2
QHD / 1440p
0−1
0−1
low / 720p
16−18
9−10
medium / 1080p
5−6
2−3
The average gaming FPS of GeForce 840M in Battlefield 5 is 125% more, than Quadro K420.
low / 768p
45−50
50−55
high / 1080p
40−45
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of Quadro K420 in Call of Duty: Warzone is 11% more, than GeForce 840M.
low / 768p
120−130
100−110
medium / 768p
90−95
75−80
ultra / 1080p
40−45
30−35
QHD / 1440p
24−27
−
4K / 2160p
18−20
9−10
high / 768p
65−70
50−55
The average gaming FPS of GeForce 840M in Counter-Strike: Global Offensive is 25% more, than Quadro K420.
low / 768p
85−90
70−75
ultra / 1080p
16−18
10−12
medium / 1080p
40−45
45−50
The average gaming FPS of GeForce 840M in Cyberpunk 2077 is 13% more, than Quadro K420.
low / 768p
75−80
65−70
medium / 768p
50−55
35−40
ultra / 1080p
24−27
14−16
The average gaming FPS of GeForce 840M in Dota 2 is 27% more, than Quadro K420.
high / 1080p
2−3
1−2
ultra / 1080p
2−3
−
4K / 2160p
0−1
0−1
low / 720p
12−14
7−8
medium / 1080p
3−4
2−3
The average gaming FPS of GeForce 840M in Far Cry 5 is 100% more, than Quadro K420.
high / 1080p
10−11
−
ultra / 1080p
5−6
−
QHD / 1440p
2−3
0−1
low / 720p
50−55
40−45
medium / 1080p
10−12
4−5
The average gaming FPS of GeForce 840M in Fortnite is 34% more, than Quadro K420.
high / 1080p
4−5
1−2
QHD / 1440p
0−1
0−1
low / 720p
16−18
10−12
medium / 1080p
7−8
3−4
The average gaming FPS of GeForce 840M in Forza Horizon 4 is 80% more, than Quadro K420.
low / 768p
45−50
35−40
high / 1080p
5−6
1−2
ultra / 1080p
2−3
−
QHD / 1440p
0−1
0−1
medium / 720p
35−40
30−35
The average gaming FPS of GeForce 840M in Grand Theft Auto V is 30% more, than Quadro K420.
high / 1080p
1−2
0−1
ultra / 1080p
0−1
0−1
4K / 2160p
0−1
0−1
low / 720p
5−6
1−2
medium / 1080p
3−4
−
The average gaming FPS of GeForce 840M in Metro Exodus is 400% more, than Quadro K420.
low / 768p
90−95
85−90
high / 1080p
85−90
50−55
ultra / 1080p
70−75
−
medium / 1080p
90−95
−
The average gaming FPS of GeForce 840M in Minecraft is 28% more, than Quadro K420.
high / 1080p
−
14−16
ultra / 1080p
12−14
12−14
low / 720p
27−30
21−24
medium / 1080p
14−16
14−16
The average gaming FPS of GeForce 840M in PLAYERUNKNOWN'S BATTLEGROUNDS is 12% more, than Quadro K420.
ultra / 1080p
4−5
−
QHD / 1440p
0−1
0−1
low / 720p
6−7
2−3
The average gaming FPS of GeForce 840M in Red Dead Redemption 2 is 200% more, than Quadro K420.
low / 768p
12−14
4−5
medium / 768p
9−10
−
high / 1080p
4−5
2−3
ultra / 1080p
3−4
−
4K / 2160p
0−1
0−1
The average gaming FPS of GeForce 840M in The Witcher 3: Wild Hunt is 166% more, than Quadro K420.
low / 768p
75−80
65−70
medium / 768p
35−40
30−35
ultra / 1080p
16−18
10−12
high / 768p
30−35
27−30
The average gaming FPS of GeForce 840M in World of Tanks is 20% more, than Quadro K420.
Full Specs
GeForce 840M
Quadro K420
Architecture
Maxwell
Kepler
Code name
N15S-GT
GK107
Type
Laptop
Workstation
Release date
12 March 2014
22 July 2014
Pipelines
384
192
Core clock speed
1029 MHz
876 MHz
Boost Clock
1124 MHz
Transistor count
1,270 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
17.98
14.02
Floating-point performance
863.2 gflops
336.4 gflops
Length
160 mm
Memory bus width
64 Bit
128 Bit
Memory clock speed
2000 MHz
1782 MHz
Memory bandwidth
16.02 GB/s
Shared memory
-
DirectX
12 (11_0)
12
Shader Model
5.1
5
OpenGL
4.5
4.5
OpenCL
1.2
1.2
Vulkan
1.1.126
+
CUDA
+
3.0
Bus support
PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256)
92 Mh/s
11 Mh/s
Laptop size
medium sized
Optimus
+
3D Vision Pro
+
Mosaic
+
Width
1" (2.5 cm)
Number of simultaneous displays
4
nView Desktop Management
+
GPU Boost
2.0
GameWorks
+
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