Radeon HD 6990M vs Radeon R9 M390X
If you are going to buy a new graphics card and are choosing between Radeon HD 6990M 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 6990M stacks up against Radeon R9 M390X, check out specs charts below.
Radeon HD 6990M and Radeon R9 M390X are Laptop Graphics Cards
Note: Radeon HD 6990M 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 6990M or Radeon R9 M390X here:
Main Specs
Radeon HD 6990M
Radeon R9 M390X
Power consumption (TDP)
100 Watt
100 Watt
Interface
MXM-B (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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Both graphics cards have the same power consumption of 100 Watt.
Radeon HD 6990M is connected by MXM-B (3.0), and Radeon R9 M390X uses PCIe 3.0 x16 interface.
Radeon R9 M390X has 2 GB more memory, than Radeon HD 6990M.
Both cards are used in Laptops.
Radeon HD 6990M is build with Terascale 2 architecture, and Radeon R9 M390X - with GCN 3.
Core clock speed of Radeon R9 M390X is 8 MHz higher, than Radeon HD 6990M.
Radeon HD 6990M 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
14−16
21−24
ultra / 1080p
8−9
12−14
QHD / 1440p
3−4
8−9
4K / 2160p
−
5−6
low / 720p
30−33
40−45
medium / 1080p
16−18
27−30
The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 53% more, than Radeon HD 6990M.
high / 1080p
21−24
35−40
ultra / 1080p
18−20
30−35
QHD / 1440p
6−7
14−16
4K / 2160p
5−6
9−10
low / 720p
45−50
70−75
medium / 1080p
24−27
40−45
The average gaming FPS of Radeon R9 M390X in Battlefield 5 is 61% more, than Radeon HD 6990M.
low / 768p
45−50
50−55
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 6990M.
low / 768p
200−210
230−240
medium / 768p
170−180
210−220
ultra / 1080p
90−95
120−130
QHD / 1440p
50−55
100−110
4K / 2160p
30−33
55−60
high / 768p
130−140
170−180
The average gaming FPS of Radeon R9 M390X in Counter-Strike: Global Offensive is 32% more, than Radeon HD 6990M.
low / 768p
55−60
60−65
ultra / 1080p
35−40
55−60
medium / 1080p
45−50
55−60
The average gaming FPS of Radeon R9 M390X in Cyberpunk 2077 is 25% more, than Radeon HD 6990M.
low / 768p
100−110
120−130
medium / 768p
90−95
110−120
ultra / 1080p
60−65
85−90
The average gaming FPS of Radeon R9 M390X in Dota 2 is 26% more, than Radeon HD 6990M.
high / 1080p
16−18
27−30
ultra / 1080p
14−16
24−27
QHD / 1440p
−
20−22
4K / 2160p
6−7
9−10
low / 720p
35−40
55−60
medium / 1080p
18−20
30−33
The average gaming FPS of Radeon R9 M390X in Far Cry 5 is 57% more, than Radeon HD 6990M.
high / 1080p
24−27
35−40
ultra / 1080p
18−20
27−30
QHD / 1440p
16−18
16−18
low / 720p
95−100
130−140
medium / 1080p
50−55
75−80
The average gaming FPS of Radeon R9 M390X in Fortnite is 40% more, than Radeon HD 6990M.
high / 1080p
24−27
35−40
ultra / 1080p
18−20
27−30
QHD / 1440p
8−9
16−18
4K / 2160p
−
14−16
low / 720p
50−55
75−80
medium / 1080p
27−30
40−45
The average gaming FPS of Radeon R9 M390X in Forza Horizon 4 is 53% more, than Radeon HD 6990M.
low / 768p
80−85
110−120
medium / 768p
70−75
95−100
high / 1080p
27−30
45−50
ultra / 1080p
10−12
18−20
QHD / 1440p
2−3
9−10
The average gaming FPS of Radeon R9 M390X in Grand Theft Auto V is 46% more, than Radeon HD 6990M.
high / 1080p
9−10
14−16
ultra / 1080p
7−8
10−12
QHD / 1440p
−
10−12
4K / 2160p
2−3
3−4
low / 720p
27−30
40−45
medium / 1080p
12−14
20−22
The average gaming FPS of Radeon R9 M390X in Metro Exodus is 50% more, than Radeon HD 6990M.
low / 768p
110−120
120−130
ultra / 1080p
100−110
−
medium / 1080p
100−110
110−120
The average gaming FPS of Radeon R9 M390X in Minecraft is 9% more, than Radeon HD 6990M.
high / 1080p
21−24
−
ultra / 1080p
16−18
14−16
low / 720p
55−60
75−80
medium / 1080p
24−27
18−20
The average gaming FPS of Radeon R9 M390X in PLAYERUNKNOWN'S BATTLEGROUNDS is 12% more, than Radeon HD 6990M.
high / 1080p
14−16
16−18
ultra / 1080p
9−10
10−12
QHD / 1440p
0−1
3−4
4K / 2160p
−
2−3
low / 720p
27−30
40−45
medium / 1080p
16−18
21−24
The average gaming FPS of Radeon R9 M390X in Red Dead Redemption 2 is 35% more, than Radeon HD 6990M.
low / 768p
50−55
80−85
medium / 768p
30−35
50−55
high / 1080p
18−20
27−30
ultra / 1080p
10−11
16−18
4K / 2160p
8−9
9−10
The average gaming FPS of Radeon R9 M390X in The Witcher 3: Wild Hunt is 58% more, than Radeon HD 6990M.
low / 768p
100−105
90−95
medium / 768p
60−65
60−65
ultra / 1080p
30−35
40−45
high / 768p
50−55
55−60
The average gaming FPS of Radeon R9 M390X in World of Tanks is 1% more, than Radeon HD 6990M.
Full Specs
Radeon HD 6990M
Radeon R9 M390X
Architecture
Terascale 2
GCN 3
Code name
Blackcomb XTX
Amethyst (XT) / Tonga
Type
Laptop
Laptop
Release date
12 July 2011
9 June 2015
Pipelines
1120
2048
Core clock speed
715 MHz
723 MHz
Transistor count
1,700 million
5,000 million
Manufacturing process technology
40 nm
28 nm
Texture fill rate
40.04
92.54
Floating-point performance
1,601.6 gflops
2,961 gflops
Memory bus width
256 Bit
256 Bit
Memory clock speed
900 MHz
Memory bandwidth
115.2 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
Laptop size
large
large
Eyefinity
+
HD3D
+
PowerTune
+
DualGraphics
+
ZeroCore
+
Switchable graphics
+
Mantle
+
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