GeForce GT 640 vs Mobility Radeon HD 3870 X2
When choosing between GeForce GT 640 and Mobility Radeon HD 3870 X2, 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 GeForce GT 640 and Mobility Radeon HD 3870 X2.
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
GeForce GT 640
Mobility Radeon HD 3870 X2
Power consumption (TDP)
65 Watt
110 Watt
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
512 MB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
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Mobility Radeon HD 3870 X2 has 69% more power consumption, than GeForce GT 640.
GeForce GT 640 is connected by PCIe 3.0 x16, and Mobility Radeon HD 3870 X2 uses PCIe 2.0 x16 interface.
Mobility Radeon HD 3870 X2 has 510 GB more memory, than GeForce GT 640.
GeForce GT 640 is used in Desktops, and Mobility Radeon HD 3870 X2 - in Laptops.
GeForce GT 640 is build with Kepler architecture, and Mobility Radeon HD 3870 X2 - with RV6xx.
Core clock speed of GeForce GT 640 is 242 MHz higher, than Mobility Radeon HD 3870 X2.
GeForce GT 640 is manufactured by 28 nm process technology, and Mobility Radeon HD 3870 X2 - by 55 nm process technology.
Memory clock speed of GeForce GT 640 is 932 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
2−3
6−7
ultra / 1080p
1−2
4−5
QHD / 1440p
0−1
0−1
low / 720p
14−16
16−18
medium / 1080p
5−6
8−9
The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 50% more, than GeForce GT 640.
high / 1080p
7−8
12−14
ultra / 1080p
5−6
10−11
QHD / 1440p
0−1
0−1
low / 720p
20−22
24−27
medium / 1080p
7−8
12−14
The average gaming FPS of Mobility Radeon HD 3870 X2 in Battlefield 5 is 50% more, than GeForce GT 640.
low / 768p
50−55
45−50
high / 1080p
35−40
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of Mobility Radeon HD 3870 X2 in Call of Duty: Warzone is 4% more, than GeForce GT 640.
low / 768p
110−120
130−140
medium / 768p
90−95
110−120
ultra / 1080p
45−50
50−55
QHD / 1440p
24−27
27−30
4K / 2160p
18−20
27−30
high / 768p
65−70
80−85
The average gaming FPS of Mobility Radeon HD 3870 X2 in Counter-Strike: Global Offensive is 19% more, than GeForce GT 640.
low / 768p
70−75
55−60
ultra / 1080p
21−24
18−20
medium / 1080p
45−50
45−50
The average gaming FPS of GeForce GT 640 in Cyberpunk 2077 is 14% more, than Mobility Radeon HD 3870 X2.
low / 768p
70−75
80−85
medium / 768p
50−55
55−60
ultra / 1080p
27−30
30−35
The average gaming FPS of Mobility Radeon HD 3870 X2 in Dota 2 is 11% more, than GeForce GT 640.
high / 1080p
3−4
8−9
ultra / 1080p
3−4
7−8
4K / 2160p
2−3
3−4
low / 720p
14−16
18−20
medium / 1080p
4−5
8−9
The average gaming FPS of Mobility Radeon HD 3870 X2 in Far Cry 5 is 80% more, than GeForce GT 640.
high / 1080p
10−12
14−16
ultra / 1080p
5−6
10−11
QHD / 1440p
2−3
−
low / 720p
50−55
60−65
medium / 1080p
16−18
21−24
The average gaming FPS of Mobility Radeon HD 3870 X2 in Fortnite is 28% more, than GeForce GT 640.
high / 1080p
6−7
12−14
ultra / 1080p
−
10−12
QHD / 1440p
4−5
1−2
4K / 2160p
2−3
−
low / 720p
21−24
24−27
medium / 1080p
9−10
14−16
The average gaming FPS of Mobility Radeon HD 3870 X2 in Forza Horizon 4 is 30% more, than GeForce GT 640.
low / 768p
45−50
50−55
medium / 768p
−
45−50
high / 1080p
7−8
12−14
ultra / 1080p
3−4
6−7
QHD / 1440p
0−1
0−1
medium / 720p
40−45
−
The average gaming FPS of Mobility Radeon HD 3870 X2 in Grand Theft Auto V is 26% more, than GeForce GT 640.
high / 1080p
2−3
4−5
ultra / 1080p
0−1
3−4
4K / 2160p
0−1
0−1
low / 720p
8−9
12−14
medium / 1080p
4−5
6−7
The average gaming FPS of Mobility Radeon HD 3870 X2 in Metro Exodus is 60% more, than GeForce GT 640.
low / 768p
80−85
95−100
high / 1080p
−
85−90
ultra / 1080p
70−75
80−85
medium / 1080p
−
90−95
The average gaming FPS of Mobility Radeon HD 3870 X2 in Minecraft is 16% more, than GeForce GT 640.
high / 1080p
−
16−18
ultra / 1080p
12−14
14−16
low / 720p
27−30
30−35
medium / 1080p
14−16
18−20
The average gaming FPS of Mobility Radeon HD 3870 X2 in PLAYERUNKNOWN'S BATTLEGROUNDS is 22% more, than GeForce GT 640.
high / 1080p
6−7
−
ultra / 1080p
4−5
7−8
QHD / 1440p
0−1
0−1
low / 720p
7−8
12−14
medium / 1080p
−
10−12
The average gaming FPS of Mobility Radeon HD 3870 X2 in Red Dead Redemption 2 is 66% more, than GeForce GT 640.
low / 768p
14−16
24−27
medium / 768p
10−11
16−18
high / 1080p
5−6
9−10
ultra / 1080p
4−5
6−7
4K / 2160p
0−1
6−7
The average gaming FPS of Mobility Radeon HD 3870 X2 in The Witcher 3: Wild Hunt is 75% more, than GeForce GT 640.
low / 768p
70−75
85−90
medium / 768p
35−40
45−50
ultra / 1080p
16−18
18−20
high / 768p
30−35
35−40
The average gaming FPS of Mobility Radeon HD 3870 X2 in World of Tanks is 20% more, than GeForce GT 640.
Full Specs
GeForce GT 640
Mobility Radeon HD 3870 X2
Architecture
Kepler
RV6xx
Code name
GK107
M88-XT CF
Type
Desktop
Laptop
Release date
5 June 2012
1 September 2008
Pipelines
384
640
Core clock speed
902 MHz
660 MHz
Transistor count
1,270 million
666 million
Manufacturing process technology
28 nm
55 nm
Texture fill rate
28.86
10.56
Floating-point performance
692.7 gflops
2x 422.4 gflops
Length
145 mm
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
850 MHz
Memory bandwidth
28.51 GB/s
54.4 GB/s
Shared memory
-
DirectX
12 (11_0)
10.1 (10_1)
Shader Model
5.1
4.1
OpenGL
4.6
3.3
OpenCL
1.2
N/A
Vulkan
1.1.126
N/A
CUDA
3.0
Bitcoin / BTC (SHA256)
24 Mh/s
Laptop size
large
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