GeForce GT 640M vs Radeon HD 7870
If you are going to buy a new graphics card and are choosing between GeForce GT 640M and Radeon HD 7870, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GT 640M stacks up against Radeon HD 7870, check out specs charts below.
GeForce GT 640M is a Laptop Graphics Card
Note: GeForce GT 640M 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 GeForce GT 640M here:
Main Specs
GeForce GT 640M
Radeon HD 7870
Power consumption (TDP)
32 Watt
175 Watt
Interface
PCIe 3.0 x16
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
No outputs
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Radeon HD 7870 has 446% more power consumption, than GeForce GT 640M.
GeForce GT 640M and Radeon HD 7870 have maximum RAM of 2 GB.
GeForce GT 640M is used in Laptops, and Radeon HD 7870 - in Desktops.
GeForce GT 640M is build with Kepler architecture, and Radeon HD 7870 - with GCN.
GeForce GT 640M and Radeon HD 7870 are manufactured by 28 nm process technology.
Memory clock speed of Radeon HD 7870 is 3000 MHz higher, than GeForce GT 640M.
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
0−1
24−27
ultra / 1080p
0−1
14−16
QHD / 1440p
0−1
9−10
4K / 2160p
−
6−7
low / 720p
10−12
45−50
medium / 1080p
2−3
30−33
The average gaming FPS of Radeon HD 7870 in Assassin's Creed Odyssey is 550% more, than GeForce GT 640M.
high / 1080p
−
35−40
ultra / 1080p
3−4
30−35
QHD / 1440p
0−1
16−18
4K / 2160p
−
10−11
low / 720p
12−14
75−80
medium / 1080p
4−5
40−45
The average gaming FPS of Radeon HD 7870 in Battlefield 5 is 614% more, than GeForce GT 640M.
low / 768p
50−55
50−55
high / 1080p
45−50
−
QHD / 1440p
0−1
0−1
GeForce GT 640M and Radeon HD 7870 have the same average FPS in Call of Duty: Warzone.
low / 768p
110−120
240−250
medium / 768p
85−90
210−220
ultra / 1080p
35−40
130−140
QHD / 1440p
−
100−110
4K / 2160p
10−11
60−65
high / 768p
55−60
180−190
The average gaming FPS of Radeon HD 7870 in Counter-Strike: Global Offensive is 175% more, than GeForce GT 640M.
low / 768p
70−75
60−65
ultra / 1080p
12−14
−
medium / 1080p
45−50
55−60
GeForce GT 640M and Radeon HD 7870 have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
120−130
medium / 768p
40−45
110−120
ultra / 1080p
18−20
85−90
The average gaming FPS of Radeon HD 7870 in Dota 2 is 147% more, than GeForce GT 640M.
high / 1080p
2−3
30−33
ultra / 1080p
2−3
27−30
QHD / 1440p
−
21−24
4K / 2160p
0−1
9−10
low / 720p
9−10
60−65
medium / 1080p
3−4
30−35
The average gaming FPS of Radeon HD 7870 in Far Cry 5 is 850% more, than GeForce GT 640M.
high / 1080p
−
35−40
ultra / 1080p
5−6
30−33
QHD / 1440p
1−2
18−20
low / 720p
45−50
130−140
medium / 1080p
7−8
80−85
The average gaming FPS of Radeon HD 7870 in Fortnite is 346% more, than GeForce GT 640M.
high / 1080p
2−3
40−45
ultra / 1080p
−
30−33
QHD / 1440p
0−1
18−20
4K / 2160p
−
14−16
low / 720p
14−16
75−80
medium / 1080p
5−6
45−50
The average gaming FPS of Radeon HD 7870 in Forza Horizon 4 is 685% more, than GeForce GT 640M.
low / 768p
40−45
110−120
medium / 768p
−
100−110
high / 1080p
3−4
45−50
ultra / 1080p
2−3
20−22
QHD / 1440p
0−1
10−11
medium / 720p
30−35
−
The average gaming FPS of Radeon HD 7870 in Grand Theft Auto V is 281% more, than GeForce GT 640M.
high / 1080p
1−2
14−16
ultra / 1080p
0−1
12−14
QHD / 1440p
−
10−12
4K / 2160p
0−1
4−5
low / 720p
2−3
45−50
medium / 1080p
2−3
21−24
The average gaming FPS of Radeon HD 7870 in Metro Exodus is 1300% more, than GeForce GT 640M.
low / 768p
85−90
120−130
high / 1080p
55−60
−
medium / 1080p
−
110−120
The average gaming FPS of Radeon HD 7870 in Minecraft is 43% more, than GeForce GT 640M.
high / 1080p
14−16
−
ultra / 1080p
12−14
14−16
low / 720p
24−27
75−80
medium / 1080p
14−16
18−20
The average gaming FPS of Radeon HD 7870 in PLAYERUNKNOWN'S BATTLEGROUNDS is 117% more, than GeForce GT 640M.
high / 1080p
−
16−18
ultra / 1080p
3−4
10−12
QHD / 1440p
0−1
4−5
4K / 2160p
−
2−3
low / 720p
3−4
45−50
medium / 1080p
−
24−27
The average gaming FPS of Radeon HD 7870 in Red Dead Redemption 2 is 866% more, than GeForce GT 640M.
low / 768p
7−8
85−90
medium / 768p
6−7
50−55
high / 1080p
3−4
30−33
ultra / 1080p
−
16−18
4K / 2160p
0−1
10−11
The average gaming FPS of Radeon HD 7870 in The Witcher 3: Wild Hunt is 1040% more, than GeForce GT 640M.
low / 768p
70−75
90−95
medium / 768p
35−40
60−65
ultra / 1080p
12−14
45−50
high / 768p
27−30
55−60
The average gaming FPS of Radeon HD 7870 in World of Tanks is 75% more, than GeForce GT 640M.
Full Specs
GeForce GT 640M
Radeon HD 7870
Architecture
Kepler
GCN
Code name
N13P-GS
Pitcairn XT
Type
Laptop
Desktop
Release date
22 March 2012
5 March 2012
Pipelines
384
1280
Core clock speed
1000 MHz
Boost Clock
645 MHz
Transistor count
1,270 million
2800 Million
Manufacturing process technology
28 nm
28 nm
Floating-point performance
480.0 gflops
Memory bus width
128bit
256 Bit
Memory clock speed
1800 - 4000 MHz
4800 MHz
Shared memory
-
-
DirectX
12 API
DirectX 11.1, Shader 5.1
Shader Model
5.1
OpenGL
4.5
OpenCL
1.1
Vulkan
1.1.126
CUDA
+
Monero / XMR (CryptoNight)
0.39 kh/s
CUDA cores
384
Bus support
PCI Express 2.0, PCI Express 3.0
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
18 Mh/s
Laptop size
medium sized
Optimus
+
Eyefinity
+
Decred / DCR (Decred)
0.63 Gh/s
Ethereum / ETH (DaggerHashimoto)
16.6 Mh/s
Zcash / ZEC (Equihash)
145 Sol/s
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