GeForce GTX 660M vs Mobility Radeon HD 3870 X2
When comparing GeForce GTX 660M and Mobility Radeon HD 3870 X2, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GTX 660M and Mobility Radeon HD 3870 X2 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
GeForce GTX 660M and Mobility Radeon HD 3870 X2 are Laptop Graphics Cards
Note: GeForce GTX 660M and Mobility Radeon HD 3870 X2 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 GeForce GTX 660M or Mobility Radeon HD 3870 X2 here:
Main Specs
GeForce GTX 660M
Mobility Radeon HD 3870 X2
Power consumption (TDP)
50 Watt
110 Watt
Interface
MXM-B (3.0)
PCIe 2.0 x16
Memory type
GDDR5
GDDR3
Maximum RAM amount
2 GB
512 MB
Display Connectors
No outputs
No outputs
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Mobility Radeon HD 3870 X2 has 120% more power consumption, than GeForce GTX 660M.
GeForce GTX 660M is connected by MXM-B (3.0), and Mobility Radeon HD 3870 X2 uses PCIe 2.0 x16 interface.
Mobility Radeon HD 3870 X2 has 510 GB more memory, than GeForce GTX 660M.
Both cards are used in Laptops.
GeForce GTX 660M is build with Kepler architecture, and Mobility Radeon HD 3870 X2 - with RV6xx.
Core clock speed of GeForce GTX 660M is 175 MHz higher, than Mobility Radeon HD 3870 X2.
GeForce GTX 660M is manufactured by 28 nm process technology, and Mobility Radeon HD 3870 X2 - by 55 nm process technology.
Memory clock speed of GeForce GTX 660M is 1150 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
27−30
4K / 2160p
27−30
27−30
high / 768p
80−85
80−85
GeForce GTX 660M and Mobility Radeon HD 3870 X2 have the same average FPS in Counter-Strike: Global Offensive.
low / 768p
55−60
55−60
ultra / 1080p
18−20
18−20
medium / 1080p
45−50
45−50
GeForce GTX 660M and Mobility Radeon HD 3870 X2 have the same average FPS in Cyberpunk 2077.
low / 768p
80−85
80−85
medium / 768p
55−60
55−60
ultra / 1080p
30−35
30−35
GeForce GTX 660M and Mobility Radeon HD 3870 X2 have the same average FPS in Dota 2.
high / 1080p
8−9
8−9
ultra / 1080p
7−8
7−8
4K / 2160p
3−4
3−4
low / 720p
18−20
18−20
medium / 1080p
8−9
8−9
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 have the same average FPS in Grand Theft Auto V.
high / 1080p
4−5
4−5
ultra / 1080p
3−4
3−4
4K / 2160p
0−1
0−1
low / 720p
12−14
12−14
medium / 1080p
6−7
6−7
GeForce GTX 660M and Mobility Radeon HD 3870 X2 have the same average FPS in Metro Exodus.
low / 768p
95−100
95−100
high / 1080p
90−95
85−90
ultra / 1080p
80−85
80−85
medium / 1080p
90−95
90−95
The average gaming FPS of GeForce GTX 660M 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
GeForce GTX 660M and Mobility Radeon HD 3870 X2 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
18−20
high / 768p
35−40
35−40
GeForce GTX 660M and Mobility Radeon HD 3870 X2 have the same average FPS in World of Tanks.
Full Specs
GeForce GTX 660M
Mobility Radeon HD 3870 X2
Architecture
Kepler
RV6xx
Code name
N13E-GE
M88-XT CF
Type
Laptop
Laptop
Release date
22 March 2012
1 September 2008
Pipelines
384
640
Core clock speed
835 MHz
660 MHz
Boost Clock
950 MHz
Transistor count
1,270 million
666 million
Manufacturing process technology
28 nm
55 nm
Texture fill rate
30.4 billion/sec
10.56
Floating-point performance
729.6 gflops
2x 422.4 gflops
Memory bus width
128bit
256 Bit
Memory clock speed
2000 MHz
850 MHz
Memory bandwidth
64.0 GB/s
54.4 GB/s
Shared memory
-
-
DirectX
12 API
10.1 (10_1)
Shader Model
5.1
4.1
OpenGL
4.5
3.3
OpenCL
1.1
N/A
Vulkan
1.1.126
N/A
CUDA
+
CUDA cores
384
Bus support
PCI Express 2.0, PCI Express 3.0
SLI options
+
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
Bitcoin / BTC (SHA256)
36 Mh/s
Laptop size
large
large
Optimus
+
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