GeForce 840M vs Radeon HD 7990
Find out if it is worth upgrading your current GPU setup by comparing GeForce 840M and Radeon HD 7990. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce 840M and Radeon HD 7990. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.
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
Radeon HD 7990
Power consumption (TDP)
33 Watt
375 Watt
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
3 GB
Display Connectors
No outputs
1x DVI, 4x mini-DisplayPort
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Radeon HD 7990 has 1036% more power consumption, than GeForce 840M.
GeForce 840M is connected by PCIe 3.0 x8, and Radeon HD 7990 uses PCIe 3.0 x16 interface.
GeForce 840M has 1 GB more memory, than Radeon HD 7990.
GeForce 840M is used in Laptops, and Radeon HD 7990 - in Desktops.
GeForce 840M is build with Maxwell architecture, and Radeon HD 7990 - with GCN 1.0.
Core clock speed of GeForce 840M is 79 MHz higher, than Radeon HD 7990.
GeForce 840M and Radeon HD 7990 are manufactured by 28 nm process technology.
Memory clock speed of Radeon HD 7990 is 4000 MHz higher, than GeForce 840M.
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
35−40
ultra / 1080p
0−1
21−24
QHD / 1440p
0−1
16−18
4K / 2160p
−
10−11
low / 720p
12−14
60−65
medium / 1080p
3−4
40−45
The average gaming FPS of Radeon HD 7990 in Assassin's Creed Odyssey is 683% more, than GeForce 840M.
high / 1080p
−
55−60
ultra / 1080p
4−5
45−50
QHD / 1440p
0−1
35−40
4K / 2160p
−
18−20
low / 720p
16−18
100−110
medium / 1080p
5−6
60−65
The average gaming FPS of Radeon HD 7990 in Battlefield 5 is 688% 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 HD 7990 in Call of Duty: Warzone is 10% more, than GeForce 840M.
low / 768p
120−130
250−260
medium / 768p
90−95
220−230
ultra / 1080p
40−45
180−190
QHD / 1440p
24−27
110−120
4K / 2160p
18−20
70−75
high / 768p
65−70
210−220
The average gaming FPS of Radeon HD 7990 in Counter-Strike: Global Offensive is 185% more, than GeForce 840M.
low / 768p
85−90
60−65
ultra / 1080p
16−18
−
medium / 1080p
40−45
55−60
The average gaming FPS of GeForce 840M in Cyberpunk 2077 is 8% more, than Radeon HD 7990.
low / 768p
75−80
120−130
medium / 768p
50−55
110−120
ultra / 1080p
24−27
100−110
The average gaming FPS of Radeon HD 7990 in Dota 2 is 125% more, than GeForce 840M.
high / 1080p
2−3
45−50
ultra / 1080p
2−3
40−45
QHD / 1440p
−
27−30
4K / 2160p
0−1
14−16
low / 720p
12−14
80−85
medium / 1080p
3−4
45−50
The average gaming FPS of Radeon HD 7990 in Far Cry 5 is 1000% more, than GeForce 840M.
high / 1080p
10−11
60−65
ultra / 1080p
5−6
45−50
QHD / 1440p
2−3
27−30
4K / 2160p
−
27−30
low / 720p
50−55
180−190
medium / 1080p
10−12
110−120
The average gaming FPS of Radeon HD 7990 in Fortnite is 443% more, than GeForce 840M.
high / 1080p
4−5
60−65
ultra / 1080p
−
45−50
QHD / 1440p
0−1
30−35
4K / 2160p
−
24−27
low / 720p
16−18
100−110
medium / 1080p
7−8
65−70
The average gaming FPS of Radeon HD 7990 in Forza Horizon 4 is 766% more, than GeForce 840M.
low / 768p
45−50
140−150
medium / 768p
−
120−130
high / 1080p
5−6
70−75
ultra / 1080p
2−3
30−35
QHD / 1440p
0−1
21−24
medium / 720p
35−40
−
The average gaming FPS of Radeon HD 7990 in Grand Theft Auto V is 361% more, than GeForce 840M.
high / 1080p
1−2
24−27
ultra / 1080p
0−1
20−22
QHD / 1440p
−
16−18
4K / 2160p
0−1
8−9
low / 720p
5−6
65−70
medium / 1080p
3−4
30−35
The average gaming FPS of Radeon HD 7990 in Metro Exodus is 1266% more, than GeForce 840M.
low / 768p
90−95
130−140
high / 1080p
85−90
−
ultra / 1080p
70−75
−
medium / 1080p
90−95
120−130
The average gaming FPS of Radeon HD 7990 in Minecraft is 41% more, than GeForce 840M.
ultra / 1080p
12−14
14−16
low / 720p
27−30
100−110
medium / 1080p
14−16
18−20
The average gaming FPS of Radeon HD 7990 in PLAYERUNKNOWN'S BATTLEGROUNDS is 155% more, than GeForce 840M.
high / 1080p
−
24−27
ultra / 1080p
4−5
16−18
QHD / 1440p
0−1
10−11
4K / 2160p
−
7−8
low / 720p
6−7
65−70
medium / 1080p
−
35−40
The average gaming FPS of Radeon HD 7990 in Red Dead Redemption 2 is 740% more, than GeForce 840M.
low / 768p
12−14
130−140
medium / 768p
9−10
85−90
high / 1080p
4−5
45−50
ultra / 1080p
3−4
24−27
4K / 2160p
0−1
16−18
The average gaming FPS of Radeon HD 7990 in The Witcher 3: Wild Hunt is 942% more, than GeForce 840M.
low / 768p
75−80
90−95
medium / 768p
35−40
60−65
ultra / 1080p
16−18
50−55
high / 768p
30−35
60−65
The average gaming FPS of Radeon HD 7990 in World of Tanks is 63% more, than GeForce 840M.
Full Specs
GeForce 840M
Radeon HD 7990
Architecture
Maxwell
GCN 1.0
Code name
N15S-GT
Malta
Type
Laptop
Desktop
Release date
12 March 2014
24 April 2013
Pipelines
384
2048
Core clock speed
1029 MHz
950 MHz
Boost Clock
1124 MHz
1000 MHz
Transistor count
4,313 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
17.98
128.0
Floating-point performance
863.2 gflops
2x 4,096 gflops
Length
307 mm
Memory bus width
64 Bit
384 Bit
Memory clock speed
2000 MHz
6000 MHz
Memory bandwidth
16.02 GB/s
288.0 GB/s
Shared memory
-
DirectX
12 (11_0)
12 (11_1)
Shader Model
5.1
5.1
OpenGL
4.5
4.6
OpenCL
1.2
1.2
Vulkan
1.1.126
1.2.131
CUDA
+
Bus support
PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256)
92 Mh/s
459 Mh/s
Laptop size
medium sized
Optimus
+
Ethereum / ETH (DaggerHashimoto)
44 Mh/s
GPU Boost
2.0
GameWorks
+
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