Radeon HD 7870M vs Radeon RX 640
In this comparison between Radeon HD 7870M and Radeon RX 640 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 Radeon HD 7870M will be the best choice, for others Radeon RX 640 will be their preference. Study the comparison tables below and make your choice.
Radeon HD 7870M and Radeon RX 640 are Laptop Graphics Cards
Note: Radeon HD 7870M and Radeon RX 640 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 Radeon HD 7870M or Radeon RX 640 here:
Main Specs
Radeon HD 7870M
Radeon RX 640
Power consumption (TDP)
45 Watt
50 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
None
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x DisplayPort
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Radeon RX 640 has 11% more power consumption, than Radeon HD 7870M.
Radeon HD 7870M is connected by PCIe 3.0 x16, and Radeon RX 640 uses PCIe 3.0 x8 interface.
Radeon RX 640 has 2 GB more memory, than Radeon HD 7870M.
Both cards are used in Laptops.
Radeon HD 7870M is build with GCN architecture, and Radeon RX 640 - with Polaris.
Core clock speed of Radeon RX 640 is 418 MHz higher, than Radeon HD 7870M.
Radeon HD 7870M is manufactured by 28 nm process technology, and Radeon RX 640 - by 14 nm process technology.
Memory clock speed of Radeon RX 640 is 2000 MHz higher, than Radeon HD 7870M.
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
5−6
ultra / 1080p
4−5
3−4
QHD / 1440p
0−1
2−3
low / 720p
16−18
16−18
medium / 1080p
8−9
7−8
The average gaming FPS of Radeon HD 7870M in Assassin's Creed Odyssey is 12% more, than Radeon RX 640.
high / 1080p
12−14
10−12
ultra / 1080p
10−11
8−9
QHD / 1440p
0−1
0−1
low / 720p
24−27
24−27
medium / 1080p
12−14
10−12
The average gaming FPS of Radeon HD 7870M in Battlefield 5 is 7% more, than Radeon RX 640.
low / 768p
45−50
45−50
high / 1080p
45−50
40−45
QHD / 1440p
0−1
0−1
The average gaming FPS of Radeon HD 7870M in Call of Duty: Warzone is 4% more, than Radeon RX 640.
low / 768p
130−140
130−140
medium / 768p
110−120
100−110
ultra / 1080p
50−55
50−55
QHD / 1440p
30−33
27−30
4K / 2160p
27−30
12−14
high / 768p
80−85
80−85
The average gaming FPS of Radeon HD 7870M in Counter-Strike: Global Offensive is 7% more, than Radeon RX 640.
low / 768p
55−60
50−55
ultra / 1080p
18−20
18−20
medium / 1080p
45−50
45−50
The average gaming FPS of Radeon HD 7870M in Cyberpunk 2077 is 5% more, than Radeon RX 640.
low / 768p
80−85
80−85
medium / 768p
60−65
55−60
ultra / 1080p
30−35
30−35
The average gaming FPS of Radeon HD 7870M in Dota 2 is 3% more, than Radeon RX 640.
high / 1080p
8−9
7−8
ultra / 1080p
8−9
5−6
4K / 2160p
3−4
5−6
low / 720p
18−20
18−20
medium / 1080p
9−10
8−9
Radeon HD 7870M and Radeon RX 640 have the same average FPS in Far Cry 5.
high / 1080p
14−16
7−8
ultra / 1080p
10−11
0−1
QHD / 1440p
−
0−1
low / 720p
60−65
60−65
medium / 1080p
21−24
18−20
The average gaming FPS of Radeon HD 7870M in Fortnite is 13% more, than Radeon RX 640.
high / 1080p
12−14
10−11
ultra / 1080p
10−12
−
QHD / 1440p
1−2
−
4K / 2160p
−
8−9
low / 720p
24−27
24−27
medium / 1080p
14−16
12−14
The average gaming FPS of Radeon HD 7870M in Forza Horizon 4 is 6% more, than Radeon RX 640.
low / 768p
50−55
50−55
medium / 768p
45−50
−
high / 1080p
12−14
10−12
ultra / 1080p
6−7
5−6
QHD / 1440p
0−1
−
medium / 720p
−
45−50
The average gaming FPS of Radeon HD 7870M in Grand Theft Auto V is 4% more, than Radeon RX 640.
high / 1080p
5−6
3−4
ultra / 1080p
3−4
1−2
4K / 2160p
0−1
−
low / 720p
12−14
10−11
medium / 1080p
6−7
5−6
The average gaming FPS of Radeon HD 7870M in Metro Exodus is 40% more, than Radeon RX 640.
low / 768p
95−100
90−95
high / 1080p
90−95
−
ultra / 1080p
80−85
80−85
medium / 1080p
90−95
−
The average gaming FPS of Radeon HD 7870M in Minecraft is 3% more, than Radeon RX 640.
high / 1080p
16−18
6−7
ultra / 1080p
14−16
2−3
4K / 2160p
−
0−1
low / 720p
30−35
27−30
medium / 1080p
18−20
10−11
The average gaming FPS of Radeon HD 7870M in PLAYERUNKNOWN'S BATTLEGROUNDS is 66% more, than Radeon RX 640.
ultra / 1080p
7−8
−
QHD / 1440p
0−1
−
low / 720p
12−14
10−12
medium / 1080p
10−12
9−10
The average gaming FPS of Radeon HD 7870M in Red Dead Redemption 2 is 20% more, than Radeon RX 640.
low / 768p
24−27
21−24
medium / 768p
16−18
14−16
high / 1080p
9−10
6−7
ultra / 1080p
6−7
4−5
4K / 2160p
6−7
3−4
The average gaming FPS of Radeon HD 7870M in The Witcher 3: Wild Hunt is 30% more, than Radeon RX 640.
low / 768p
85−90
75−80
medium / 768p
45−50
40−45
ultra / 1080p
20−22
18−20
high / 768p
35−40
35−40
The average gaming FPS of Radeon HD 7870M in World of Tanks is 9% more, than Radeon RX 640.
Full Specs
Radeon HD 7870M
Radeon RX 640
Architecture
GCN
Polaris
Code name
Heathrow XT
Polaris 12
Type
Laptop
Laptop
Release date
24 April 2012
12 August 2019
Pipelines
640
640
Core clock speed
800 MHz
1218 MHz
Boost Clock
1218 MHz
Transistor count
1,500 million
2,200 million
Manufacturing process technology
28 nm
14 nm
Texture fill rate
32.00
38.98
Floating-point performance
1,024 gflops
Memory bus width
128 Bit
64 Bit
Memory clock speed
4000 MHz
6000 MHz
Memory bandwidth
64 GB/s
112.0 GB/s
Shared memory
-
-
DirectX
12 (11_1)
12 (12_0)
Shader Model
5.1
6.4
OpenGL
4.6
4.6
OpenCL
1.2
2.0
Vulkan
1.2.131
1.2.131
FreeSync
+
Laptop size
large
large
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