Mobility Radeon HD 3870 X2 vs Radeon R9 280X
When choosing between Mobility Radeon HD 3870 X2 and Radeon R9 280X, 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 R9 280X.
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 R9 280X
Power consumption (TDP)
110 Watt
250 Watt
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin + 1 x 8-pin
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
3 GB
Display Connectors
No outputs
2x DVI, 1x HDMI, 1x DisplayPort
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Radeon R9 280X has 127% more power consumption, than Mobility Radeon HD 3870 X2.
Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon R9 280X uses PCIe 3.0 x16 interface.
Mobility Radeon HD 3870 X2 has 509 GB more memory, than Radeon R9 280X.
Mobility Radeon HD 3870 X2 is used in Laptops, and Radeon R9 280X - in Desktops.
Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon R9 280X - with GCN.
Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon R9 280X - by 28 nm process technology.
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
35−40
ultra / 1080p
4−5
21−24
QHD / 1440p
0−1
16−18
4K / 2160p
−
10−11
low / 720p
16−18
60−65
medium / 1080p
8−9
40−45
The average gaming FPS of Radeon R9 280X in Assassin's Creed Odyssey is 355% more, than Mobility Radeon HD 3870 X2.
high / 1080p
12−14
55−60
ultra / 1080p
10−11
45−50
QHD / 1440p
0−1
35−40
4K / 2160p
−
18−20
low / 720p
24−27
100−110
medium / 1080p
12−14
60−65
The average gaming FPS of Radeon R9 280X in Battlefield 5 is 353% more, than Mobility Radeon HD 3870 X2.
low / 768p
45−50
50−55
high / 1080p
45−50
−
QHD / 1440p
0−1
0−1
The average gaming FPS of Radeon R9 280X in Call of Duty: Warzone is 10% more, than Mobility Radeon HD 3870 X2.
low / 768p
130−140
250−260
medium / 768p
110−120
220−230
ultra / 1080p
50−55
180−190
QHD / 1440p
27−30
110−120
4K / 2160p
27−30
70−75
high / 768p
80−85
210−220
The average gaming FPS of Radeon R9 280X in Counter-Strike: Global Offensive is 142% more, than Mobility Radeon HD 3870 X2.
low / 768p
55−60
60−65
ultra / 1080p
18−20
−
medium / 1080p
45−50
55−60
The average gaming FPS of Radeon R9 280X in Cyberpunk 2077 is 15% more, than Mobility Radeon HD 3870 X2.
low / 768p
80−85
120−130
medium / 768p
55−60
110−120
ultra / 1080p
30−35
100−110
The average gaming FPS of Radeon R9 280X in Dota 2 is 101% more, than Mobility Radeon HD 3870 X2.
high / 1080p
8−9
45−50
ultra / 1080p
7−8
40−45
QHD / 1440p
−
27−30
4K / 2160p
3−4
14−16
low / 720p
18−20
80−85
medium / 1080p
8−9
45−50
The average gaming FPS of Radeon R9 280X in Far Cry 5 is 422% more, than Mobility Radeon HD 3870 X2.
high / 1080p
14−16
60−65
ultra / 1080p
10−11
45−50
QHD / 1440p
−
27−30
4K / 2160p
−
27−30
low / 720p
60−65
180−190
medium / 1080p
21−24
110−120
The average gaming FPS of Radeon R9 280X in Fortnite is 277% more, than Mobility Radeon HD 3870 X2.
high / 1080p
12−14
60−65
ultra / 1080p
10−12
45−50
QHD / 1440p
1−2
30−35
4K / 2160p
−
24−27
low / 720p
24−27
100−110
medium / 1080p
14−16
65−70
The average gaming FPS of Radeon R9 280X in Forza Horizon 4 is 384% more, than Mobility Radeon HD 3870 X2.
low / 768p
50−55
140−150
medium / 768p
45−50
120−130
high / 1080p
12−14
70−75
ultra / 1080p
6−7
30−35
QHD / 1440p
0−1
21−24
The average gaming FPS of Radeon R9 280X in Grand Theft Auto V is 220% more, than Mobility Radeon HD 3870 X2.
high / 1080p
4−5
24−27
ultra / 1080p
3−4
20−22
QHD / 1440p
−
16−18
4K / 2160p
0−1
8−9
low / 720p
12−14
65−70
medium / 1080p
6−7
30−35
The average gaming FPS of Radeon R9 280X in Metro Exodus is 500% more, than Mobility Radeon HD 3870 X2.
low / 768p
95−100
130−140
high / 1080p
85−90
−
ultra / 1080p
80−85
−
medium / 1080p
90−95
120−130
The average gaming FPS of Radeon R9 280X in Minecraft is 36% more, than Mobility Radeon HD 3870 X2.
high / 1080p
16−18
−
ultra / 1080p
14−16
14−16
low / 720p
30−35
100−110
medium / 1080p
18−20
18−20
The average gaming FPS of Radeon R9 280X in PLAYERUNKNOWN'S BATTLEGROUNDS is 109% more, than Mobility Radeon HD 3870 X2.
high / 1080p
−
24−27
ultra / 1080p
7−8
16−18
QHD / 1440p
0−1
10−11
4K / 2160p
−
7−8
low / 720p
12−14
65−70
medium / 1080p
10−12
35−40
The average gaming FPS of Radeon R9 280X in Red Dead Redemption 2 is 300% more, than Mobility Radeon HD 3870 X2.
low / 768p
24−27
130−140
medium / 768p
16−18
85−90
high / 1080p
9−10
45−50
ultra / 1080p
6−7
24−27
4K / 2160p
6−7
16−18
The average gaming FPS of Radeon R9 280X in The Witcher 3: Wild Hunt is 376% more, than Mobility Radeon HD 3870 X2.
low / 768p
85−90
90−95
medium / 768p
45−50
60−65
ultra / 1080p
18−20
50−55
high / 768p
35−40
60−65
The average gaming FPS of Radeon R9 280X in World of Tanks is 42% more, than Mobility Radeon HD 3870 X2.
Full Specs
Mobility Radeon HD 3870 X2
Radeon R9 280X
Architecture
RV6xx
GCN
Code name
M88-XT CF
Thaiti XTL
Type
Laptop
Desktop
Release date
1 September 2008
8 October 2013
Pipelines
640
2048
Core clock speed
660 MHz
Boost Clock
1000 MHz
Transistor count
666 million
4,313 million
Manufacturing process technology
55 nm
28 nm
Texture fill rate
10.56
128.0
Floating-point performance
2x 422.4 gflops
4,096 gflops
Length
275 mm
Memory bus width
256 Bit
384 Bit
Memory clock speed
850 MHz
Memory bandwidth
54.4 GB/s
288 GB/s
Shared memory
-
-
DirectX
10.1 (10_1)
Shader Model
4.1
5.1
OpenGL
3.3
4.6
OpenCL
N/A
1.2
Vulkan
N/A
+
Monero / XMR (CryptoNight)
0.5 kh/s
FreeSync
+
Bus support
PCIe 3.0
HDMI
+
Bitcoin / BTC (SHA256)
494 Mh/s
Laptop size
large
Eyefinity
+
HD3D
+
TrueAudio
+
Design
reference
DisplayPort support
+
CrossFire
+
DDMA audio
+
Decred / DCR (Decred)
1.07 Gh/s
Ethereum / ETH (DaggerHashimoto)
14.42 Mh/s
Zcash / ZEC (Equihash)
285 Sol/s
AppAcceleration
+
LiquidVR
+
TressFX
+
UVD
+
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