Iris Plus Graphics 640 vs Mobility Radeon HD 3870 X2
In this comparison between Iris Plus Graphics 640 and Mobility Radeon HD 3870 X2 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 Iris Plus Graphics 640 will be the best choice, for others Mobility Radeon HD 3870 X2 will be their preference. Study the comparison tables below and make your choice.
Iris Plus Graphics 640 and Mobility Radeon HD 3870 X2 are Laptop Graphics Cards
Note: Iris Plus Graphics 640 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 Iris Plus Graphics 640 or Mobility Radeon HD 3870 X2 here:
Main Specs
Iris Plus Graphics 640
Mobility Radeon HD 3870 X2
Power consumption (TDP)
15 Watt
110 Watt
Interface
PCIe 3.0 x1
PCIe 2.0 x16
Memory type
DDR3L/LPDDR3/DDR4
GDDR3
Maximum RAM amount
32 GB
512 MB
Display Connectors
No outputs
No outputs
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Mobility Radeon HD 3870 X2 has 633% more power consumption, than Iris Plus Graphics 640.
Iris Plus Graphics 640 is connected by PCIe 3.0 x1, and Mobility Radeon HD 3870 X2 uses PCIe 2.0 x16 interface.
Mobility Radeon HD 3870 X2 has 480 GB more memory, than Iris Plus Graphics 640.
Both cards are used in Laptops.
Iris Plus Graphics 640 is build with Gen. 9.5 Kaby Lake architecture, and Mobility Radeon HD 3870 X2 - with RV6xx.
Core clock speed of Mobility Radeon HD 3870 X2 is 360 MHz higher, than Iris Plus Graphics 640.
Iris Plus Graphics 640 is manufactured by 14 nm process technology, and Mobility Radeon HD 3870 X2 - by 55 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
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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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 Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 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
Iris Plus Graphics 640 and Mobility Radeon HD 3870 X2 have the same average FPS in World of Tanks.
Full Specs
Iris Plus Graphics 640
Mobility Radeon HD 3870 X2
Architecture
Gen. 9.5 Kaby Lake
RV6xx
Code name
Kaby Lake GT3e
M88-XT CF
Type
Laptop
Laptop
Release date
3 January 2017
1 September 2008
Pipelines
48
640
Core clock speed
300 MHz
660 MHz
Boost Clock
1050 MHz
Transistor count
189 million
666 million
Manufacturing process technology
14 nm
55 nm
Texture fill rate
52.80
10.56
Floating-point performance
2x 422.4 gflops
Memory bus width
64/128 Bit
256 Bit
Memory clock speed
850 MHz
Memory bandwidth
54.4 GB/s
Shared memory
+
-
DirectX
12 (12_1)
10.1 (10_1)
Shader Model
6.4
4.1
OpenGL
4.6
3.3
OpenCL
2.1
N/A
Vulkan
1.1.103
N/A
Laptop size
large
Quick Sync
+
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