Mobility Radeon HD 3870 X2 vs Radeon R9 M275
If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 3870 X2 and Radeon R9 M275, 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 Mobility Radeon HD 3870 X2 stacks up against Radeon R9 M275, check out specs charts below.
Mobility Radeon HD 3870 X2 and Radeon R9 M275 are Laptop Graphics Cards
Note: Mobility Radeon HD 3870 X2 and Radeon R9 M275 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 R9 M275 here:
Main Specs
Mobility Radeon HD 3870 X2
Radeon R9 M275
Power consumption (TDP)
110 Watt
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
4 GB
Display Connectors
No outputs
No outputs
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Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon R9 M275 uses PCIe 3.0 x16 interface.
Mobility Radeon HD 3870 X2 has 508 GB more memory, than Radeon R9 M275.
Both cards are used in Laptops.
Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon R9 M275 - with GCN.
Core clock speed of Radeon R9 M275 is 265 MHz higher, than Mobility Radeon HD 3870 X2.
Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon R9 M275 - by 28 nm process technology.
Memory clock speed of Radeon R9 M275 is 3650 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
0−1
ultra / 1080p
4−5
−
QHD / 1440p
0−1
0−1
low / 720p
16−18
12−14
medium / 1080p
8−9
3−4
The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 50% more, than Radeon R9 M275.
high / 1080p
12−14
5−6
ultra / 1080p
10−11
4−5
QHD / 1440p
0−1
0−1
low / 720p
24−27
16−18
medium / 1080p
12−14
5−6
The average gaming FPS of Mobility Radeon HD 3870 X2 in Battlefield 5 is 87% more, than Radeon R9 M275.
low / 768p
45−50
50−55
high / 1080p
45−50
45−50
QHD / 1440p
0−1
0−1
medium / 1080p
−
50−55
The average gaming FPS of Radeon R9 M275 in Call of Duty: Warzone is 6% more, than Mobility Radeon HD 3870 X2.
low / 768p
130−140
110−120
medium / 768p
110−120
90−95
ultra / 1080p
50−55
40−45
QHD / 1440p
27−30
24−27
4K / 2160p
27−30
18−20
high / 768p
80−85
65−70
The average gaming FPS of Mobility Radeon HD 3870 X2 in Counter-Strike: Global Offensive is 21% more, than Radeon R9 M275.
low / 768p
55−60
60−65
ultra / 1080p
18−20
18−20
medium / 1080p
45−50
50−55
The average gaming FPS of Radeon R9 M275 in Cyberpunk 2077 is 7% more, than Mobility Radeon HD 3870 X2.
low / 768p
80−85
70−75
medium / 768p
55−60
50−55
ultra / 1080p
30−35
24−27
The average gaming FPS of Mobility Radeon HD 3870 X2 in Dota 2 is 14% more, than Radeon R9 M275.
high / 1080p
8−9
1−2
ultra / 1080p
7−8
−
4K / 2160p
3−4
0−1
low / 720p
18−20
10−12
medium / 1080p
8−9
3−4
The average gaming FPS of Mobility Radeon HD 3870 X2 in Far Cry 5 is 140% more, than Radeon R9 M275.
high / 1080p
14−16
9−10
ultra / 1080p
10−11
5−6
QHD / 1440p
−
1−2
low / 720p
60−65
50−55
medium / 1080p
21−24
12−14
The average gaming FPS of Mobility Radeon HD 3870 X2 in Fortnite is 35% more, than Radeon R9 M275.
high / 1080p
12−14
6−7
ultra / 1080p
10−12
4−5
QHD / 1440p
1−2
0−1
low / 720p
24−27
18−20
medium / 1080p
14−16
7−8
The average gaming FPS of Mobility Radeon HD 3870 X2 in Forza Horizon 4 is 77% more, than Radeon R9 M275.
low / 768p
50−55
45−50
medium / 768p
45−50
−
high / 1080p
12−14
7−8
ultra / 1080p
6−7
4−5
QHD / 1440p
0−1
0−1
medium / 720p
−
35−40
The average gaming FPS of Mobility Radeon HD 3870 X2 in Grand Theft Auto V is 26% more, than Radeon R9 M275.
high / 1080p
4−5
3−4
ultra / 1080p
3−4
1−2
4K / 2160p
0−1
0−1
low / 720p
12−14
7−8
medium / 1080p
6−7
4−5
The average gaming FPS of Mobility Radeon HD 3870 X2 in Metro Exodus is 50% more, than Radeon R9 M275.
low / 768p
95−100
85−90
high / 1080p
85−90
70−75
ultra / 1080p
80−85
−
medium / 1080p
90−95
−
The average gaming FPS of Mobility Radeon HD 3870 X2 in Minecraft is 15% more, than Radeon R9 M275.
high / 1080p
16−18
14−16
ultra / 1080p
14−16
12−14
low / 720p
30−35
24−27
medium / 1080p
18−20
14−16
The average gaming FPS of Mobility Radeon HD 3870 X2 in PLAYERUNKNOWN'S BATTLEGROUNDS is 17% more, than Radeon R9 M275.
ultra / 1080p
7−8
7−8
QHD / 1440p
0−1
0−1
low / 720p
12−14
8−9
medium / 1080p
10−12
−
The average gaming FPS of Mobility Radeon HD 3870 X2 in Red Dead Redemption 2 is 25% more, than Radeon R9 M275.
low / 768p
24−27
16−18
medium / 768p
16−18
12−14
high / 1080p
9−10
6−7
ultra / 1080p
6−7
5−6
4K / 2160p
6−7
−
The average gaming FPS of Mobility Radeon HD 3870 X2 in The Witcher 3: Wild Hunt is 40% more, than Radeon R9 M275.
low / 768p
85−90
85−90
medium / 768p
45−50
35−40
ultra / 1080p
18−20
14−16
high / 768p
35−40
30−33
The average gaming FPS of Mobility Radeon HD 3870 X2 in World of Tanks is 11% more, than Radeon R9 M275.
Full Specs
Mobility Radeon HD 3870 X2
Radeon R9 M275
Architecture
RV6xx
GCN
Code name
M88-XT CF
Venus
Type
Laptop
Laptop
Release date
1 September 2008
1 August 2014
Pipelines
640
640
Core clock speed
660 MHz
925 MHz
Boost Clock
925 MHz
Transistor count
666 million
1,500 million
Manufacturing process technology
55 nm
28 nm
Texture fill rate
10.56
37.00
Floating-point performance
2x 422.4 gflops
1,184 gflops
Memory bus width
256 Bit
128 Bit
Memory clock speed
850 MHz
4500 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
Bitcoin / BTC (SHA256)
122 Mh/s
Laptop size
large
large
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