Radeon HD 8790M vs Radeon R9 M390X
In this comparison between Radeon HD 8790M 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 Radeon HD 8790M will be the best choice, for others Radeon R9 M390X will be their preference. Study the comparison tables below and make your choice.
Radeon HD 8790M and Radeon R9 M390X are Laptop Graphics Cards
Note: Radeon HD 8790M 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 Radeon HD 8790M or Radeon R9 M390X here:
Main Specs
Radeon HD 8790M
Radeon R9 M390X
Power consumption (TDP)
100 Watt
Interface
MXM-A (3.0)
PCIe 3.0 x16
Supplementary power connectors
None
None
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Display Connectors
No outputs
No outputs
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Radeon HD 8790M is connected by MXM-A (3.0), and Radeon R9 M390X uses PCIe 3.0 x16 interface.
Radeon R9 M390X has 2 GB more memory, than Radeon HD 8790M.
Both cards are used in Laptops.
Radeon HD 8790M is build with GCN architecture, and Radeon R9 M390X - with GCN 3.
Core clock speed of Radeon HD 8790M is 127 MHz higher, than Radeon R9 M390X.
Radeon HD 8790M 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
3−4
21−24
ultra / 1080p
1−2
12−14
QHD / 1440p
0−1
8−9
4K / 2160p
−
5−6
low / 720p
14−16
40−45
medium / 1080p
6−7
27−30
The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 333% more, than Radeon HD 8790M.
high / 1080p
8−9
35−40
ultra / 1080p
6−7
30−35
QHD / 1440p
0−1
14−16
4K / 2160p
−
9−10
low / 720p
21−24
70−75
medium / 1080p
9−10
40−45
The average gaming FPS of Radeon R9 M390X in Battlefield 5 is 318% more, than Radeon HD 8790M.
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 Radeon HD 8790M.
low / 768p
120−130
230−240
medium / 768p
100−110
210−220
ultra / 1080p
50−55
120−130
QHD / 1440p
24−27
100−110
4K / 2160p
−
55−60
high / 768p
75−80
170−180
The average gaming FPS of Radeon R9 M390X in Counter-Strike: Global Offensive is 122% more, than Radeon HD 8790M.
low / 768p
70−75
60−65
ultra / 1080p
21−24
55−60
medium / 1080p
40−45
55−60
The average gaming FPS of Radeon R9 M390X in Cyberpunk 2077 is 31% more, than Radeon HD 8790M.
low / 768p
75−80
120−130
medium / 768p
55−60
110−120
ultra / 1080p
30−35
85−90
The average gaming FPS of Radeon R9 M390X in Dota 2 is 98% more, than Radeon HD 8790M.
high / 1080p
4−5
27−30
ultra / 1080p
4−5
24−27
QHD / 1440p
−
20−22
4K / 2160p
1−2
9−10
low / 720p
14−16
55−60
medium / 1080p
6−7
30−33
The average gaming FPS of Radeon R9 M390X in Far Cry 5 is 400% more, than Radeon HD 8790M.
high / 1080p
12−14
35−40
ultra / 1080p
7−8
27−30
QHD / 1440p
4−5
16−18
low / 720p
60−65
130−140
medium / 1080p
18−20
75−80
The average gaming FPS of Radeon R9 M390X in Fortnite is 180% more, than Radeon HD 8790M.
high / 1080p
8−9
35−40
ultra / 1080p
7−8
27−30
QHD / 1440p
0−1
16−18
4K / 2160p
−
14−16
low / 720p
21−24
75−80
medium / 1080p
10−11
40−45
The average gaming FPS of Radeon R9 M390X in Forza Horizon 4 is 283% more, than Radeon HD 8790M.
low / 768p
50−55
110−120
medium / 768p
−
95−100
high / 1080p
10−11
45−50
ultra / 1080p
4−5
18−20
QHD / 1440p
0−1
9−10
medium / 720p
40−45
−
The average gaming FPS of Radeon R9 M390X in Grand Theft Auto V is 172% more, than Radeon HD 8790M.
high / 1080p
2−3
14−16
ultra / 1080p
0−1
10−12
QHD / 1440p
−
10−12
4K / 2160p
0−1
3−4
low / 720p
9−10
40−45
medium / 1080p
4−5
20−22
The average gaming FPS of Radeon R9 M390X in Metro Exodus is 420% more, than Radeon HD 8790M.
low / 768p
85−90
120−130
high / 1080p
70−75
−
medium / 1080p
−
110−120
The average gaming FPS of Radeon R9 M390X in Minecraft is 43% more, than Radeon HD 8790M.
ultra / 1080p
12−14
14−16
low / 720p
30−35
75−80
medium / 1080p
14−16
18−20
The average gaming FPS of Radeon R9 M390X in PLAYERUNKNOWN'S BATTLEGROUNDS is 85% more, than Radeon HD 8790M.
high / 1080p
7−8
16−18
ultra / 1080p
4−5
10−12
QHD / 1440p
0−1
3−4
4K / 2160p
−
2−3
low / 720p
8−9
40−45
medium / 1080p
8−9
21−24
The average gaming FPS of Radeon R9 M390X in Red Dead Redemption 2 is 228% more, than Radeon HD 8790M.
low / 768p
20−22
80−85
medium / 768p
12−14
50−55
high / 1080p
7−8
27−30
ultra / 1080p
5−6
16−18
4K / 2160p
1−2
9−10
The average gaming FPS of Radeon R9 M390X in The Witcher 3: Wild Hunt is 322% more, than Radeon HD 8790M.
low / 768p
75−80
90−95
medium / 768p
40−45
60−65
ultra / 1080p
18−20
40−45
high / 768p
30−35
55−60
The average gaming FPS of Radeon R9 M390X in World of Tanks is 50% more, than Radeon HD 8790M.
Full Specs
Radeon HD 8790M
Radeon R9 M390X
Architecture
GCN
GCN 3
Code name
Mars XTX
Amethyst (XT) / Tonga
Type
Laptop
Laptop
Release date
16 November 2012
9 June 2015
Pipelines
384
2048
Core clock speed
850 MHz
723 MHz
Boost Clock
900 MHz
Transistor count
950 million
5,000 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
21.60
92.54
Floating-point performance
691.2 gflops
2,961 gflops
Memory bus width
128 Bit
256 Bit
Memory clock speed
4500 MHz
Memory bandwidth
64 GB/s
160.0 GB/s
Shared memory
-
-
DirectX
12 (11_1)
Shader Model
5.1
6.3
OpenGL
4.6
4.4
OpenCL
1.2
Not Listed
Vulkan
1.2.131
+
FreeSync
+
Bus support
PCIe 3.0
Bitcoin / BTC (SHA256)
80 Mh/s
Laptop size
medium sized
large
Eyefinity
+
HD3D
+
PowerTune
+
DualGraphics
+
ZeroCore
+
Switchable graphics
+
Mantle
+
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