Radeon HD 6990 vs Radeon HD 8790M
When choosing between Radeon HD 6990 and Radeon HD 8790M, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between Radeon HD 6990 and Radeon HD 8790M.
Radeon HD 8790M is a Laptop Graphics Card
Note: Radeon HD 8790M 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 HD 8790M here:
Main Specs
Radeon HD 6990
Radeon HD 8790M
Power consumption (TDP)
375 Watt
Interface
PCIe 2.0 x16
MXM-A (3.0)
Supplementary power connectors
2x 8-pin
None
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
1x DVI, 4x mini-DisplayPort
No outputs
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Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon HD 8790M uses MXM-A (3.0) interface.
Radeon HD 6990 and Radeon HD 8790M have maximum RAM of 2 GB.
Radeon HD 6990 is used in Desktops, and Radeon HD 8790M - in Laptops.
Radeon HD 6990 is build with TeraScale 3 architecture, and Radeon HD 8790M - with GCN.
Core clock speed of Radeon HD 8790M is 20 MHz higher, than Radeon HD 6990.
Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon HD 8790M - by 28 nm process technology.
Memory clock speed of Radeon HD 6990 is 500 MHz higher, than Radeon HD 8790M.
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
3−4
ultra / 1080p
9−10
1−2
QHD / 1440p
3−4
0−1
low / 720p
30−35
14−16
medium / 1080p
18−20
6−7
The average gaming FPS of Radeon HD 6990 in Assassin's Creed Odyssey is 216% more, than Radeon HD 8790M.
high / 1080p
24−27
8−9
ultra / 1080p
21−24
6−7
QHD / 1440p
7−8
0−1
4K / 2160p
5−6
−
low / 720p
50−55
21−24
medium / 1080p
27−30
9−10
The average gaming FPS of Radeon HD 6990 in Battlefield 5 is 190% more, than Radeon HD 8790M.
low / 768p
45−50
45−50
high / 1080p
−
40−45
QHD / 1440p
0−1
0−1
Radeon HD 6990 and Radeon HD 8790M have the same average FPS in Call of Duty: Warzone.
low / 768p
210−220
120−130
medium / 768p
170−180
100−110
ultra / 1080p
95−100
50−55
QHD / 1440p
50−55
24−27
4K / 2160p
30−33
−
high / 768p
140−150
75−80
The average gaming FPS of Radeon HD 6990 in Counter-Strike: Global Offensive is 77% more, than Radeon HD 8790M.
low / 768p
55−60
70−75
ultra / 1080p
40−45
21−24
medium / 1080p
45−50
40−45
The average gaming FPS of Radeon HD 6990 in Cyberpunk 2077 is 8% more, than Radeon HD 8790M.
low / 768p
110−120
75−80
medium / 768p
90−95
55−60
ultra / 1080p
60−65
30−35
The average gaming FPS of Radeon HD 6990 in Dota 2 is 63% more, than Radeon HD 8790M.
high / 1080p
18−20
4−5
ultra / 1080p
16−18
4−5
4K / 2160p
6−7
1−2
low / 720p
35−40
14−16
medium / 1080p
18−20
6−7
The average gaming FPS of Radeon HD 6990 in Far Cry 5 is 216% more, than Radeon HD 8790M.
high / 1080p
24−27
12−14
ultra / 1080p
18−20
7−8
QHD / 1440p
16−18
4−5
low / 720p
95−100
60−65
medium / 1080p
50−55
18−20
The average gaming FPS of Radeon HD 6990 in Fortnite is 100% more, than Radeon HD 8790M.
high / 1080p
24−27
8−9
ultra / 1080p
20−22
7−8
QHD / 1440p
9−10
0−1
low / 720p
50−55
21−24
medium / 1080p
27−30
10−11
The average gaming FPS of Radeon HD 6990 in Forza Horizon 4 is 158% more, than Radeon HD 8790M.
low / 768p
85−90
50−55
medium / 768p
75−80
−
high / 1080p
30−33
10−11
ultra / 1080p
12−14
4−5
QHD / 1440p
3−4
0−1
medium / 720p
−
40−45
The average gaming FPS of Radeon HD 6990 in Grand Theft Auto V is 100% more, than Radeon HD 8790M.
high / 1080p
9−10
2−3
ultra / 1080p
7−8
0−1
4K / 2160p
2−3
0−1
low / 720p
27−30
9−10
medium / 1080p
12−14
4−5
The average gaming FPS of Radeon HD 6990 in Metro Exodus is 240% more, than Radeon HD 8790M.
low / 768p
110−120
85−90
high / 1080p
−
70−75
ultra / 1080p
100−110
−
medium / 1080p
100−110
−
The average gaming FPS of Radeon HD 6990 in Minecraft is 32% more, than Radeon HD 8790M.
high / 1080p
21−24
−
ultra / 1080p
18−20
12−14
low / 720p
55−60
30−35
medium / 1080p
24−27
14−16
The average gaming FPS of Radeon HD 6990 in PLAYERUNKNOWN'S BATTLEGROUNDS is 70% more, than Radeon HD 8790M.
high / 1080p
14−16
7−8
ultra / 1080p
9−10
4−5
QHD / 1440p
0−1
0−1
low / 720p
27−30
8−9
medium / 1080p
16−18
8−9
The average gaming FPS of Radeon HD 6990 in Red Dead Redemption 2 is 142% more, than Radeon HD 8790M.
low / 768p
55−60
20−22
medium / 768p
30−35
12−14
high / 1080p
18−20
7−8
ultra / 1080p
10−12
5−6
4K / 2160p
8−9
1−2
The average gaming FPS of Radeon HD 6990 in The Witcher 3: Wild Hunt is 177% more, than Radeon HD 8790M.
low / 768p
100−110
75−80
medium / 768p
60−65
40−45
ultra / 1080p
35−40
18−20
high / 768p
50−55
30−35
The average gaming FPS of Radeon HD 6990 in World of Tanks is 52% more, than Radeon HD 8790M.
Full Specs
Radeon HD 6990
Radeon HD 8790M
Architecture
TeraScale 3
GCN
Code name
Antilles
Mars XTX
Type
Desktop
Laptop
Release date
8 March 2011
16 November 2012
Pipelines
1536
384
Core clock speed
830 MHz
850 MHz
Boost Clock
900 MHz
Transistor count
2,640 million
950 million
Manufacturing process technology
40 nm
28 nm
Texture fill rate
79.68
21.60
Floating-point performance
2x 2,549.8 gflops
691.2 gflops
Length
295 mm
Memory bus width
256 Bit
128 Bit
Memory clock speed
5000 MHz
4500 MHz
Memory bandwidth
160.0 GB/s
64 GB/s
Shared memory
-
DirectX
11.2 (11_0)
12 (11_1)
Shader Model
5.0
5.1
OpenGL
4.4
4.6
OpenCL
1.2
1.2
Vulkan
N/A
1.2.131
Bitcoin / BTC (SHA256)
265 Mh/s
80 Mh/s
Laptop size
medium sized
Ethereum / ETH (DaggerHashimoto)
24 Mh/s
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