Mobility Radeon HD 3870 X2 vs Radeon HD 6990
When choosing between Mobility Radeon HD 3870 X2 and Radeon HD 6990, 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 Mobility Radeon HD 3870 X2 and Radeon HD 6990.
Mobility Radeon HD 3870 X2 is a Laptop Graphics Card
Note: Mobility Radeon HD 3870 X2 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 Mobility Radeon HD 3870 X2 here:
Main Specs
Mobility Radeon HD 3870 X2
Radeon HD 6990
Power consumption (TDP)
110 Watt
375 Watt
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 8-pin
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
2 GB
Display Connectors
No outputs
1x DVI, 4x mini-DisplayPort
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Radeon HD 6990 has 240% more power consumption, than Mobility Radeon HD 3870 X2.
Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
Mobility Radeon HD 3870 X2 has 510 GB more memory, than Radeon HD 6990.
Mobility Radeon HD 3870 X2 is used in Laptops, and Radeon HD 6990 - in Desktops.
Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon HD 6990 - with TeraScale 3.
Core clock speed of Radeon HD 6990 is 170 MHz higher, than Mobility Radeon HD 3870 X2.
Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon HD 6990 - by 40 nm process technology.
Memory clock speed of Radeon HD 6990 is 4150 MHz higher, than Mobility Radeon HD 3870 X2.
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
6−7
14−16
ultra / 1080p
4−5
9−10
QHD / 1440p
0−1
3−4
low / 720p
16−18
30−35
medium / 1080p
8−9
18−20
The average gaming FPS of Radeon HD 6990 in Assassin's Creed Odyssey is 111% more, than Mobility Radeon HD 3870 X2.
high / 1080p
12−14
24−27
ultra / 1080p
10−11
21−24
QHD / 1440p
0−1
7−8
4K / 2160p
−
5−6
low / 720p
24−27
50−55
medium / 1080p
12−14
27−30
The average gaming FPS of Radeon HD 6990 in Battlefield 5 is 113% more, than Mobility Radeon HD 3870 X2.
low / 768p
45−50
45−50
high / 1080p
45−50
−
QHD / 1440p
0−1
0−1
Mobility Radeon HD 3870 X2 and Radeon HD 6990 have the same average FPS in Call of Duty: Warzone.
low / 768p
130−140
210−220
medium / 768p
110−120
170−180
ultra / 1080p
50−55
95−100
QHD / 1440p
27−30
50−55
4K / 2160p
27−30
30−33
high / 768p
80−85
140−150
The average gaming FPS of Radeon HD 6990 in Counter-Strike: Global Offensive is 63% more, than Mobility Radeon HD 3870 X2.
low / 768p
55−60
55−60
ultra / 1080p
18−20
40−45
medium / 1080p
45−50
45−50
The average gaming FPS of Radeon HD 6990 in Cyberpunk 2077 is 19% more, than Mobility Radeon HD 3870 X2.
low / 768p
80−85
110−120
medium / 768p
55−60
90−95
ultra / 1080p
30−35
60−65
The average gaming FPS of Radeon HD 6990 in Dota 2 is 57% more, than Mobility Radeon HD 3870 X2.
high / 1080p
8−9
18−20
ultra / 1080p
7−8
16−18
4K / 2160p
3−4
6−7
low / 720p
18−20
35−40
medium / 1080p
8−9
18−20
The average gaming FPS of Radeon HD 6990 in Far Cry 5 is 111% more, than Mobility Radeon HD 3870 X2.
high / 1080p
14−16
24−27
ultra / 1080p
10−11
18−20
QHD / 1440p
−
16−18
low / 720p
60−65
95−100
medium / 1080p
21−24
50−55
The average gaming FPS of Radeon HD 6990 in Fortnite is 77% more, than Mobility Radeon HD 3870 X2.
high / 1080p
12−14
24−27
ultra / 1080p
10−12
20−22
QHD / 1440p
1−2
9−10
low / 720p
24−27
50−55
medium / 1080p
14−16
27−30
The average gaming FPS of Radeon HD 6990 in Forza Horizon 4 is 107% more, than Mobility Radeon HD 3870 X2.
low / 768p
50−55
85−90
medium / 768p
45−50
75−80
high / 1080p
12−14
30−33
ultra / 1080p
6−7
12−14
QHD / 1440p
0−1
3−4
The average gaming FPS of Radeon HD 6990 in Grand Theft Auto V is 79% more, than Mobility Radeon HD 3870 X2.
high / 1080p
4−5
9−10
ultra / 1080p
3−4
7−8
4K / 2160p
0−1
2−3
low / 720p
12−14
27−30
medium / 1080p
6−7
12−14
The average gaming FPS of Radeon HD 6990 in Metro Exodus is 133% more, than Mobility Radeon HD 3870 X2.
low / 768p
95−100
110−120
high / 1080p
85−90
−
ultra / 1080p
80−85
100−110
medium / 1080p
90−95
100−110
The average gaming FPS of Radeon HD 6990 in Minecraft is 20% more, than Mobility Radeon HD 3870 X2.
high / 1080p
16−18
21−24
ultra / 1080p
14−16
18−20
low / 720p
30−35
55−60
medium / 1080p
18−20
24−27
The average gaming FPS of Radeon HD 6990 in PLAYERUNKNOWN'S BATTLEGROUNDS is 55% more, than Mobility Radeon HD 3870 X2.
high / 1080p
−
14−16
ultra / 1080p
7−8
9−10
QHD / 1440p
0−1
0−1
low / 720p
12−14
27−30
medium / 1080p
10−12
16−18
The average gaming FPS of Radeon HD 6990 in Red Dead Redemption 2 is 80% more, than Mobility Radeon HD 3870 X2.
low / 768p
24−27
55−60
medium / 768p
16−18
30−35
high / 1080p
9−10
18−20
ultra / 1080p
6−7
10−12
4K / 2160p
6−7
8−9
The average gaming FPS of Radeon HD 6990 in The Witcher 3: Wild Hunt is 92% more, than Mobility Radeon HD 3870 X2.
low / 768p
85−90
100−110
medium / 768p
45−50
60−65
ultra / 1080p
18−20
35−40
high / 768p
35−40
50−55
The average gaming FPS of Radeon HD 6990 in World of Tanks is 36% more, than Mobility Radeon HD 3870 X2.
Full Specs
Mobility Radeon HD 3870 X2
Radeon HD 6990
Architecture
RV6xx
TeraScale 3
Code name
M88-XT CF
Antilles
Type
Laptop
Desktop
Release date
1 September 2008
8 March 2011
Pipelines
640
1536
Core clock speed
660 MHz
830 MHz
Transistor count
666 million
2,640 million
Manufacturing process technology
55 nm
40 nm
Texture fill rate
10.56
79.68
Floating-point performance
2x 422.4 gflops
2x 2,549.8 gflops
Length
295 mm
Memory bus width
256 Bit
256 Bit
Memory clock speed
850 MHz
5000 MHz
Memory bandwidth
54.4 GB/s
160.0 GB/s
Shared memory
-
DirectX
10.1 (10_1)
11.2 (11_0)
Shader Model
4.1
5.0
OpenGL
3.3
4.4
OpenCL
N/A
1.2
Vulkan
N/A
N/A
Bitcoin / BTC (SHA256)
265 Mh/s
Laptop size
large
Ethereum / ETH (DaggerHashimoto)
24 Mh/s
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