GeForce 840M vs Radeon R9 M390X
In this comparison between GeForce 840M and Radeon R9 M390X you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce 840M will be the best choice, for others Radeon R9 M390X will be their preference. Study the comparison tables below and make your choice.
GeForce 840M and Radeon R9 M390X are Laptop Graphics Cards
Note: GeForce 840M and Radeon R9 M390X 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 840M or Radeon R9 M390X here:
Main Specs
GeForce 840M
Radeon R9 M390X
Power consumption (TDP)
33 Watt
100 Watt
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
4 GB
Display Connectors
No outputs
No outputs
Check Price
Check Price
Radeon R9 M390X has 203% more power consumption, than GeForce 840M.
GeForce 840M is connected by PCIe 3.0 x8, and Radeon R9 M390X uses PCIe 3.0 x16 interface.
GeForce 840M and Radeon R9 M390X have maximum RAM of 4 GB.
Both cards are used in Laptops.
GeForce 840M is build with Maxwell architecture, and Radeon R9 M390X - with GCN 3.
Core clock speed of GeForce 840M is 306 MHz higher, than Radeon R9 M390X.
GeForce 840M and Radeon R9 M390X are manufactured by 28 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
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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X 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 Radeon R9 M390X in World of Tanks is 53% more, than GeForce 840M.
Full Specs
GeForce 840M
Radeon R9 M390X
Architecture
Maxwell
GCN 3
Code name
N15S-GT
Amethyst (XT) / Tonga
Type
Laptop
Laptop
Release date
12 March 2014
9 June 2015
Pipelines
384
2048
Core clock speed
1029 MHz
723 MHz
Boost Clock
1124 MHz
Transistor count
5,000 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
17.98
92.54
Floating-point performance
863.2 gflops
2,961 gflops
Memory bus width
64 Bit
256 Bit
Memory clock speed
2000 MHz
Memory bandwidth
16.02 GB/s
160.0 GB/s
Shared memory
-
-
DirectX
12 (11_0)
Shader Model
5.1
6.3
OpenGL
4.5
4.4
OpenCL
1.2
Not Listed
Vulkan
1.1.126
+
CUDA
+
FreeSync
+
Bus support
PCI Express 2.0, PCI Express 3.0
PCIe 3.0
Bitcoin / BTC (SHA256)
92 Mh/s
Laptop size
medium sized
large
Optimus
+
Eyefinity
+
HD3D
+
PowerTune
+
DualGraphics
+
ZeroCore
+
Switchable graphics
+
Mantle
+
GPU Boost
2.0
GameWorks
+
Check Price
Check Price
