Mobility Radeon HD 3870 X2 vs Radeon HD 6870
In this comparison between Mobility Radeon HD 3870 X2 and Radeon HD 6870 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 6870 will be their preference. Study the comparison tables below and make your choice.
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 6870
Power consumption (TDP)
110 Watt
151 Watt
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
1 GB
Display Connectors
No outputs
2x DVI, 1x HDMI, 2x mini-DisplayPort
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Radeon HD 6870 has 37% 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 511 GB more memory, than Radeon HD 6870.
Mobility Radeon HD 3870 X2 is used in Laptops, and Radeon HD 6870 - in Desktops.
Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon HD 6870 - with Terascale 2.
Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon HD 6870 - by 40 nm process technology.
Memory clock speed of Radeon HD 6870 is 200 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
10−12
ultra / 1080p
4−5
6−7
QHD / 1440p
0−1
1−2
low / 720p
16−18
24−27
medium / 1080p
8−9
12−14
The average gaming FPS of Radeon HD 6870 in Assassin's Creed Odyssey is 55% more, than Mobility Radeon HD 3870 X2.
high / 1080p
12−14
18−20
ultra / 1080p
10−11
14−16
QHD / 1440p
0−1
1−2
low / 720p
24−27
35−40
medium / 1080p
12−14
20−22
The average gaming FPS of Radeon HD 6870 in Battlefield 5 is 53% 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 6870 have the same average FPS in Call of Duty: Warzone.
low / 768p
130−140
180−190
medium / 768p
110−120
140−150
ultra / 1080p
50−55
75−80
QHD / 1440p
27−30
40−45
4K / 2160p
27−30
30−33
high / 768p
80−85
110−120
The average gaming FPS of Radeon HD 6870 in Counter-Strike: Global Offensive is 35% more, than Mobility Radeon HD 3870 X2.
low / 768p
55−60
55−60
ultra / 1080p
18−20
30−33
medium / 1080p
45−50
45−50
The average gaming FPS of Radeon HD 6870 in Cyberpunk 2077 is 9% more, than Mobility Radeon HD 3870 X2.
low / 768p
80−85
95−100
medium / 768p
55−60
75−80
ultra / 1080p
30−35
50−55
The average gaming FPS of Radeon HD 6870 in Dota 2 is 31% more, than Mobility Radeon HD 3870 X2.
high / 1080p
8−9
12−14
ultra / 1080p
7−8
12−14
4K / 2160p
3−4
5−6
low / 720p
18−20
27−30
medium / 1080p
8−9
14−16
The average gaming FPS of Radeon HD 6870 in Far Cry 5 is 66% more, than Mobility Radeon HD 3870 X2.
high / 1080p
14−16
20−22
ultra / 1080p
10−11
14−16
low / 720p
60−65
80−85
medium / 1080p
21−24
35−40
The average gaming FPS of Radeon HD 6870 in Fortnite is 44% more, than Mobility Radeon HD 3870 X2.
high / 1080p
12−14
18−20
ultra / 1080p
10−12
14−16
QHD / 1440p
1−2
5−6
low / 720p
24−27
40−45
medium / 1080p
14−16
21−24
The average gaming FPS of Radeon HD 6870 in Forza Horizon 4 is 53% more, than Mobility Radeon HD 3870 X2.
low / 768p
50−55
70−75
medium / 768p
45−50
60−65
high / 1080p
12−14
21−24
ultra / 1080p
6−7
9−10
QHD / 1440p
0−1
0−1
The average gaming FPS of Radeon HD 6870 in Grand Theft Auto V is 41% more, than Mobility Radeon HD 3870 X2.
high / 1080p
4−5
7−8
ultra / 1080p
3−4
5−6
4K / 2160p
0−1
1−2
low / 720p
12−14
21−24
medium / 1080p
6−7
9−10
The average gaming FPS of Radeon HD 6870 in Metro Exodus is 83% more, than Mobility Radeon HD 3870 X2.
low / 768p
95−100
100−110
high / 1080p
85−90
−
ultra / 1080p
80−85
90−95
medium / 1080p
90−95
100−105
The average gaming FPS of Radeon HD 6870 in Minecraft is 11% more, than Mobility Radeon HD 3870 X2.
high / 1080p
16−18
18−20
ultra / 1080p
14−16
16−18
low / 720p
30−35
45−50
medium / 1080p
18−20
21−24
The average gaming FPS of Radeon HD 6870 in PLAYERUNKNOWN'S BATTLEGROUNDS is 30% more, than Mobility Radeon HD 3870 X2.
high / 1080p
−
12−14
ultra / 1080p
7−8
8−9
QHD / 1440p
0−1
0−1
low / 720p
12−14
20−22
medium / 1080p
10−12
12−14
The average gaming FPS of Radeon HD 6870 in Red Dead Redemption 2 is 40% more, than Mobility Radeon HD 3870 X2.
low / 768p
24−27
40−45
medium / 768p
16−18
24−27
high / 1080p
9−10
14−16
ultra / 1080p
6−7
8−9
4K / 2160p
6−7
7−8
The average gaming FPS of Radeon HD 6870 in The Witcher 3: Wild Hunt is 46% more, than Mobility Radeon HD 3870 X2.
low / 768p
85−90
95−100
medium / 768p
45−50
55−60
ultra / 1080p
18−20
27−30
high / 768p
35−40
45−50
The average gaming FPS of Radeon HD 6870 in World of Tanks is 21% more, than Mobility Radeon HD 3870 X2.
Full Specs
Mobility Radeon HD 3870 X2
Radeon HD 6870
Architecture
RV6xx
Terascale 2
Code name
M88-XT CF
RV940 Barts
Type
Laptop
Desktop
Release date
1 September 2008
22 October 2010
Pipelines
640
1120
Core clock speed
660 MHz
Boost Clock
900 MHz
Transistor count
666 million
1,700 million
Manufacturing process technology
55 nm
40 nm
Texture fill rate
10.56
50.40
Floating-point performance
2x 422.4 gflops
2,016.0 gflops
Length
220 mm
Memory bus width
256 Bit
256 Bit
Memory clock speed
850 MHz
1050 MHz
Memory bandwidth
54.4 GB/s
134.4 GB/s
Shared memory
-
-
DirectX
10.1 (10_1)
Shader Model
4.1
5.0
OpenGL
3.3
4.4
OpenCL
N/A
1.2
Vulkan
N/A
Bus support
PCIe 2.0 x16
HDMI
+
Bitcoin / BTC (SHA256)
213 Mh/s
Laptop size
large
Eyefinity
+
Design
reference
CrossFire
+
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