Radeon HD 6790 vs Radeon R9 M390X
If you are going to buy a new graphics card and are choosing between Radeon HD 6790 and Radeon R9 M390X, 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 Radeon HD 6790 stacks up against Radeon R9 M390X, check out specs charts below.
Radeon R9 M390X is a Laptop Graphics Card
Note: Radeon R9 M390X 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 Radeon R9 M390X here:
Main Specs
Radeon HD 6790
Radeon R9 M390X
Power consumption (TDP)
150 Watt
100 Watt
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
None
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
4 GB
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
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Radeon HD 6790 has 50% more power consumption, than Radeon R9 M390X.
Radeon HD 6790 is connected by PCIe 2.0 x16, and Radeon R9 M390X uses PCIe 3.0 x16 interface.
Radeon R9 M390X has 3 GB more memory, than Radeon HD 6790.
Radeon HD 6790 is used in Desktops, and Radeon R9 M390X - in Laptops.
Radeon HD 6790 is build with Terascale 2 architecture, and Radeon R9 M390X - with GCN 3.
Core clock speed of Radeon HD 6790 is 117 MHz higher, than Radeon R9 M390X.
Radeon HD 6790 is manufactured by 40 nm process technology, and Radeon R9 M390X - 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
7−8
21−24
ultra / 1080p
4−5
12−14
QHD / 1440p
0−1
8−9
4K / 2160p
−
5−6
low / 720p
18−20
40−45
medium / 1080p
9−10
27−30
The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 160% more, than Radeon HD 6790.
high / 1080p
12−14
35−40
ultra / 1080p
10−12
30−35
QHD / 1440p
0−1
14−16
4K / 2160p
−
9−10
low / 720p
27−30
70−75
medium / 1080p
14−16
40−45
The average gaming FPS of Radeon R9 M390X in Battlefield 5 is 187% more, than Radeon HD 6790.
low / 768p
45−50
50−55
high / 1080p
45−50
−
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 6790.
low / 768p
140−150
230−240
medium / 768p
120−130
210−220
ultra / 1080p
60−65
120−130
QHD / 1440p
30−35
100−110
4K / 2160p
27−30
55−60
high / 768p
90−95
170−180
The average gaming FPS of Radeon R9 M390X in Counter-Strike: Global Offensive is 87% more, than Radeon HD 6790.
low / 768p
55−60
60−65
ultra / 1080p
21−24
55−60
medium / 1080p
45−50
55−60
The average gaming FPS of Radeon R9 M390X in Cyberpunk 2077 is 40% more, than Radeon HD 6790.
low / 768p
85−90
120−130
medium / 768p
65−70
110−120
ultra / 1080p
35−40
85−90
The average gaming FPS of Radeon R9 M390X in Dota 2 is 70% more, than Radeon HD 6790.
high / 1080p
9−10
27−30
ultra / 1080p
8−9
24−27
QHD / 1440p
−
20−22
4K / 2160p
4−5
9−10
low / 720p
21−24
55−60
medium / 1080p
10−11
30−33
The average gaming FPS of Radeon R9 M390X in Far Cry 5 is 172% more, than Radeon HD 6790.
high / 1080p
16−18
35−40
ultra / 1080p
10−12
27−30
QHD / 1440p
−
16−18
low / 720p
65−70
130−140
medium / 1080p
27−30
75−80
The average gaming FPS of Radeon R9 M390X in Fortnite is 122% more, than Radeon HD 6790.
high / 1080p
14−16
35−40
ultra / 1080p
12−14
27−30
QHD / 1440p
2−3
16−18
4K / 2160p
−
14−16
low / 720p
27−30
75−80
medium / 1080p
16−18
40−45
The average gaming FPS of Radeon R9 M390X in Forza Horizon 4 is 166% more, than Radeon HD 6790.
low / 768p
55−60
110−120
medium / 768p
50−55
95−100
high / 1080p
14−16
45−50
ultra / 1080p
7−8
18−20
QHD / 1440p
0−1
9−10
The average gaming FPS of Radeon R9 M390X in Grand Theft Auto V is 109% more, than Radeon HD 6790.
high / 1080p
5−6
14−16
ultra / 1080p
4−5
10−12
QHD / 1440p
−
10−12
4K / 2160p
0−1
3−4
low / 720p
14−16
40−45
medium / 1080p
7−8
20−22
The average gaming FPS of Radeon R9 M390X in Metro Exodus is 175% more, than Radeon HD 6790.
low / 768p
95−100
120−130
high / 1080p
90−95
−
ultra / 1080p
85−90
−
medium / 1080p
95−100
110−120
The average gaming FPS of Radeon R9 M390X in Minecraft is 23% more, than Radeon HD 6790.
high / 1080p
16−18
−
ultra / 1080p
14−16
14−16
low / 720p
35−40
75−80
medium / 1080p
18−20
18−20
The average gaming FPS of Radeon R9 M390X in PLAYERUNKNOWN'S BATTLEGROUNDS is 60% more, than Radeon HD 6790.
high / 1080p
−
16−18
ultra / 1080p
8−9
10−12
QHD / 1440p
0−1
3−4
4K / 2160p
−
2−3
low / 720p
14−16
40−45
medium / 1080p
10−12
21−24
The average gaming FPS of Radeon R9 M390X in Red Dead Redemption 2 is 127% more, than Radeon HD 6790.
low / 768p
27−30
80−85
medium / 768p
18−20
50−55
high / 1080p
10−11
27−30
ultra / 1080p
7−8
16−18
4K / 2160p
6−7
9−10
The average gaming FPS of Radeon R9 M390X in The Witcher 3: Wild Hunt is 171% more, than Radeon HD 6790.
low / 768p
85−90
90−95
medium / 768p
45−50
60−65
ultra / 1080p
21−24
40−45
high / 768p
40−45
55−60
The average gaming FPS of Radeon R9 M390X in World of Tanks is 26% more, than Radeon HD 6790.
Full Specs
Radeon HD 6790
Radeon R9 M390X
Architecture
Terascale 2
GCN 3
Code name
Barts
Amethyst (XT) / Tonga
Type
Desktop
Laptop
Release date
4 April 2011
9 June 2015
Pipelines
800
2048
Core clock speed
840 MHz
723 MHz
Transistor count
1,700 million
5,000 million
Manufacturing process technology
40 nm
28 nm
Texture fill rate
33.60
92.54
Floating-point performance
1,344.0 gflops
2,961 gflops
Length
198 mm
Memory bus width
256 Bit
256 Bit
Memory clock speed
1050 MHz
Memory bandwidth
134.4 GB/s
160.0 GB/s
Shared memory
-
DirectX
11.2 (11_0)
Shader Model
5.0
6.3
OpenGL
4.4
4.4
OpenCL
1.2
Not Listed
Vulkan
N/A
+
FreeSync
+
Bus support
PCIe 3.0
Bitcoin / BTC (SHA256)
122 Mh/s
Laptop size
large
Eyefinity
+
HD3D
+
PowerTune
+
DualGraphics
+
ZeroCore
+
Switchable graphics
+
Mantle
+
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