Mobility Radeon HD 3870 X2 vs Radeon HD 7870M
In this comparison between Mobility Radeon HD 3870 X2 and Radeon HD 7870M 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 Mobility Radeon HD 3870 X2 will be the best choice, for others Radeon HD 7870M will be their preference. Study the comparison tables below and make your choice.
Mobility Radeon HD 3870 X2 and Radeon HD 7870M are Laptop Graphics Cards
Note: Mobility Radeon HD 3870 X2 and Radeon HD 7870M 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 Mobility Radeon HD 3870 X2 or Radeon HD 7870M here:
Main Specs
Mobility Radeon HD 3870 X2
Radeon HD 7870M
Power consumption (TDP)
110 Watt
45 Watt
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
2 GB
Display Connectors
No outputs
No outputs
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Mobility Radeon HD 3870 X2 has 144% more power consumption, than Radeon HD 7870M.
Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon HD 7870M uses PCIe 3.0 x16 interface.
Mobility Radeon HD 3870 X2 has 510 GB more memory, than Radeon HD 7870M.
Both cards are used in Laptops.
Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon HD 7870M - with GCN.
Core clock speed of Radeon HD 7870M is 140 MHz higher, than Mobility Radeon HD 3870 X2.
Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon HD 7870M - by 28 nm process technology.
Memory clock speed of Radeon HD 7870M is 3150 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
6−7
ultra / 1080p
4−5
4−5
QHD / 1440p
0−1
0−1
low / 720p
16−18
16−18
medium / 1080p
8−9
8−9
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Assassin's Creed Odyssey.
high / 1080p
12−14
12−14
ultra / 1080p
10−11
10−11
QHD / 1440p
0−1
0−1
low / 720p
24−27
24−27
medium / 1080p
12−14
12−14
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Battlefield 5.
low / 768p
45−50
45−50
high / 1080p
45−50
45−50
QHD / 1440p
0−1
0−1
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Call of Duty: Warzone.
low / 768p
130−140
130−140
medium / 768p
110−120
110−120
ultra / 1080p
50−55
50−55
QHD / 1440p
27−30
30−33
4K / 2160p
27−30
27−30
high / 768p
80−85
80−85
The average gaming FPS of Radeon HD 7870M in Counter-Strike: Global Offensive is 1% more, than Mobility Radeon HD 3870 X2.
low / 768p
55−60
55−60
ultra / 1080p
18−20
18−20
medium / 1080p
45−50
45−50
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Cyberpunk 2077.
low / 768p
80−85
80−85
medium / 768p
55−60
60−65
ultra / 1080p
30−35
30−35
The average gaming FPS of Radeon HD 7870M in Dota 2 is 3% more, than Mobility Radeon HD 3870 X2.
high / 1080p
8−9
8−9
ultra / 1080p
7−8
8−9
4K / 2160p
3−4
3−4
low / 720p
18−20
18−20
medium / 1080p
8−9
9−10
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Far Cry 5.
high / 1080p
14−16
14−16
ultra / 1080p
10−11
10−11
low / 720p
60−65
60−65
medium / 1080p
21−24
21−24
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Fortnite.
high / 1080p
12−14
12−14
ultra / 1080p
10−12
10−12
QHD / 1440p
1−2
1−2
low / 720p
24−27
24−27
medium / 1080p
14−16
14−16
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Forza Horizon 4.
low / 768p
50−55
50−55
medium / 768p
45−50
45−50
high / 1080p
12−14
12−14
ultra / 1080p
6−7
6−7
QHD / 1440p
0−1
0−1
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Grand Theft Auto V.
high / 1080p
4−5
5−6
ultra / 1080p
3−4
3−4
4K / 2160p
0−1
0−1
low / 720p
12−14
12−14
medium / 1080p
6−7
6−7
The average gaming FPS of Radeon HD 7870M in Metro Exodus is 16% more, than Mobility Radeon HD 3870 X2.
low / 768p
95−100
95−100
high / 1080p
85−90
90−95
ultra / 1080p
80−85
80−85
medium / 1080p
90−95
90−95
The average gaming FPS of Radeon HD 7870M in Minecraft is 1% more, than Mobility Radeon HD 3870 X2.
high / 1080p
16−18
16−18
ultra / 1080p
14−16
14−16
low / 720p
30−35
30−35
medium / 1080p
18−20
18−20
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in PLAYERUNKNOWN'S BATTLEGROUNDS.
ultra / 1080p
7−8
7−8
QHD / 1440p
0−1
0−1
low / 720p
12−14
12−14
medium / 1080p
10−12
10−12
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in Red Dead Redemption 2.
low / 768p
24−27
24−27
medium / 768p
16−18
16−18
high / 1080p
9−10
9−10
ultra / 1080p
6−7
6−7
4K / 2160p
6−7
6−7
Mobility Radeon HD 3870 X2 and Radeon HD 7870M have the same average FPS in The Witcher 3: Wild Hunt.
low / 768p
85−90
85−90
medium / 768p
45−50
45−50
ultra / 1080p
18−20
20−22
high / 768p
35−40
35−40
The average gaming FPS of Radeon HD 7870M in World of Tanks is 2% more, than Mobility Radeon HD 3870 X2.
Full Specs
Mobility Radeon HD 3870 X2
Radeon HD 7870M
Architecture
RV6xx
GCN
Code name
M88-XT CF
Heathrow XT
Type
Laptop
Laptop
Release date
1 September 2008
24 April 2012
Pipelines
640
640
Core clock speed
660 MHz
800 MHz
Transistor count
666 million
1,500 million
Manufacturing process technology
55 nm
28 nm
Texture fill rate
10.56
32.00
Floating-point performance
2x 422.4 gflops
1,024 gflops
Memory bus width
256 Bit
128 Bit
Memory clock speed
850 MHz
4000 MHz
Memory bandwidth
54.4 GB/s
64 GB/s
Shared memory
-
-
DirectX
10.1 (10_1)
12 (11_1)
Shader Model
4.1
5.1
OpenGL
3.3
4.6
OpenCL
N/A
1.2
Vulkan
N/A
1.2.131
Laptop size
large
large
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