GeForce GT 640 vs Radeon HD 7870
In this comparison between GeForce GT 640 and Radeon HD 7870 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 GeForce GT 640 will be the best choice, for others Radeon HD 7870 will be their preference. Study the comparison tables below and make your choice.
Main Specs
GeForce GT 640
Radeon HD 7870
Power consumption (TDP)
65 Watt
175 Watt
Interface
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
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Radeon HD 7870 has 169% more power consumption, than GeForce GT 640.
GeForce GT 640 and Radeon HD 7870 have maximum RAM of 2 GB.
Both cards are used in Desktops.
GeForce GT 640 is build with Kepler architecture, and Radeon HD 7870 - with GCN.
Core clock speed of Radeon HD 7870 is 98 MHz higher, than GeForce GT 640.
GeForce GT 640 and Radeon HD 7870 are manufactured by 28 nm process technology.
Memory clock speed of Radeon HD 7870 is 3018 MHz higher, than GeForce GT 640.
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
24−27
ultra / 1080p
1−2
14−16
QHD / 1440p
0−1
9−10
4K / 2160p
−
6−7
low / 720p
14−16
45−50
medium / 1080p
5−6
30−33
The average gaming FPS of Radeon HD 7870 in Assassin's Creed Odyssey is 383% more, than GeForce GT 640.
high / 1080p
7−8
35−40
ultra / 1080p
5−6
30−35
QHD / 1440p
0−1
16−18
4K / 2160p
−
10−11
low / 720p
20−22
75−80
medium / 1080p
7−8
40−45
The average gaming FPS of Radeon HD 7870 in Battlefield 5 is 370% more, than GeForce GT 640.
low / 768p
50−55
50−55
high / 1080p
35−40
−
QHD / 1440p
0−1
0−1
GeForce GT 640 and Radeon HD 7870 have the same average FPS in Call of Duty: Warzone.
low / 768p
110−120
240−250
medium / 768p
90−95
210−220
ultra / 1080p
45−50
130−140
QHD / 1440p
24−27
100−110
4K / 2160p
18−20
60−65
high / 768p
65−70
180−190
The average gaming FPS of Radeon HD 7870 in Counter-Strike: Global Offensive is 157% more, than GeForce GT 640.
low / 768p
70−75
60−65
ultra / 1080p
21−24
−
medium / 1080p
45−50
55−60
GeForce GT 640 and Radeon HD 7870 have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
120−130
medium / 768p
50−55
110−120
ultra / 1080p
27−30
85−90
The average gaming FPS of Radeon HD 7870 in Dota 2 is 113% more, than GeForce GT 640.
high / 1080p
3−4
30−33
ultra / 1080p
3−4
27−30
QHD / 1440p
−
21−24
4K / 2160p
2−3
9−10
low / 720p
14−16
60−65
medium / 1080p
4−5
30−35
The average gaming FPS of Radeon HD 7870 in Far Cry 5 is 540% more, than GeForce GT 640.
high / 1080p
10−12
35−40
ultra / 1080p
5−6
30−33
QHD / 1440p
2−3
18−20
low / 720p
50−55
130−140
medium / 1080p
16−18
80−85
The average gaming FPS of Radeon HD 7870 in Fortnite is 258% more, than GeForce GT 640.
high / 1080p
6−7
40−45
ultra / 1080p
−
30−33
QHD / 1440p
4−5
18−20
4K / 2160p
2−3
14−16
low / 720p
21−24
75−80
medium / 1080p
9−10
45−50
The average gaming FPS of Radeon HD 7870 in Forza Horizon 4 is 344% more, than GeForce GT 640.
low / 768p
45−50
110−120
medium / 768p
−
100−110
high / 1080p
7−8
45−50
ultra / 1080p
3−4
20−22
QHD / 1440p
0−1
10−11
medium / 720p
40−45
−
The average gaming FPS of Radeon HD 7870 in Grand Theft Auto V is 221% more, than GeForce GT 640.
high / 1080p
2−3
14−16
ultra / 1080p
0−1
12−14
QHD / 1440p
−
10−12
4K / 2160p
0−1
4−5
low / 720p
8−9
45−50
medium / 1080p
4−5
21−24
The average gaming FPS of Radeon HD 7870 in Metro Exodus is 460% more, than GeForce GT 640.
low / 768p
80−85
120−130
ultra / 1080p
70−75
−
medium / 1080p
−
110−120
The average gaming FPS of Radeon HD 7870 in Minecraft is 52% more, than GeForce GT 640.
ultra / 1080p
12−14
14−16
low / 720p
27−30
75−80
medium / 1080p
14−16
18−20
The average gaming FPS of Radeon HD 7870 in PLAYERUNKNOWN'S BATTLEGROUNDS is 105% more, than GeForce GT 640.
high / 1080p
6−7
16−18
ultra / 1080p
4−5
10−12
QHD / 1440p
0−1
4−5
4K / 2160p
−
2−3
low / 720p
7−8
45−50
medium / 1080p
−
24−27
The average gaming FPS of Radeon HD 7870 in Red Dead Redemption 2 is 316% more, than GeForce GT 640.
low / 768p
14−16
85−90
medium / 768p
10−11
50−55
high / 1080p
5−6
30−33
ultra / 1080p
4−5
16−18
4K / 2160p
0−1
10−11
The average gaming FPS of Radeon HD 7870 in The Witcher 3: Wild Hunt is 487% more, than GeForce GT 640.
low / 768p
70−75
90−95
medium / 768p
35−40
60−65
ultra / 1080p
16−18
45−50
high / 768p
30−35
55−60
The average gaming FPS of Radeon HD 7870 in World of Tanks is 66% more, than GeForce GT 640.
Full Specs
GeForce GT 640
Radeon HD 7870
Architecture
Kepler
GCN
Code name
GK107
Pitcairn XT
Type
Desktop
Desktop
Release date
5 June 2012
5 March 2012
Pipelines
384
1280
Core clock speed
902 MHz
1000 MHz
Transistor count
1,270 million
2800 Million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
28.86
Floating-point performance
692.7 gflops
Length
145 mm
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
4800 MHz
Memory bandwidth
28.51 GB/s
Shared memory
-
DirectX
12 (11_0)
DirectX 11.1, Shader 5.1
Shader Model
5.1
OpenGL
4.6
OpenCL
1.2
Vulkan
1.1.126
CUDA
3.0
Monero / XMR (CryptoNight)
0.39 kh/s
Bitcoin / BTC (SHA256)
24 Mh/s
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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