GeForce GT 640 vs Radeon HD 7970M
In this comparison between GeForce GT 640 and Radeon HD 7970M 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 7970M will be their preference. Study the comparison tables below and make your choice.
Radeon HD 7970M is a Laptop Graphics Card
Note: Radeon HD 7970M 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 Radeon HD 7970M here:
Main Specs
GeForce GT 640
Radeon HD 7970M
Power consumption (TDP)
65 Watt
100 Watt
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
None
None
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
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Radeon HD 7970M has 53% more power consumption, than GeForce GT 640.
GeForce GT 640 is connected by PCIe 3.0 x16, and Radeon HD 7970M uses MXM-B (3.0) interface.
GeForce GT 640 and Radeon HD 7970M have maximum RAM of 2 GB.
GeForce GT 640 is used in Desktops, and Radeon HD 7970M - in Laptops.
GeForce GT 640 is build with Kepler architecture, and Radeon HD 7970M - with GCN.
Core clock speed of GeForce GT 640 is 52 MHz higher, than Radeon HD 7970M.
GeForce GT 640 and Radeon HD 7970M are manufactured by 28 nm process technology.
Memory clock speed of Radeon HD 7970M 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
18−20
ultra / 1080p
1−2
10−12
QHD / 1440p
0−1
5−6
4K / 2160p
−
4−5
low / 720p
14−16
35−40
medium / 1080p
5−6
21−24
The average gaming FPS of Radeon HD 7970M in Assassin's Creed Odyssey is 266% more, than GeForce GT 640.
high / 1080p
7−8
27−30
ultra / 1080p
5−6
24−27
QHD / 1440p
0−1
9−10
4K / 2160p
−
6−7
low / 720p
20−22
60−65
medium / 1080p
7−8
30−35
The average gaming FPS of Radeon HD 7970M in Battlefield 5 is 270% 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 7970M have the same average FPS in Call of Duty: Warzone.
low / 768p
110−120
220−230
medium / 768p
90−95
190−200
ultra / 1080p
45−50
110−120
QHD / 1440p
24−27
75−80
4K / 2160p
18−20
40−45
high / 768p
65−70
160−170
The average gaming FPS of Radeon HD 7970M in Counter-Strike: Global Offensive is 122% more, than GeForce GT 640.
low / 768p
70−75
60−65
ultra / 1080p
21−24
45−50
medium / 1080p
45−50
55−60
The average gaming FPS of Radeon HD 7970M in Cyberpunk 2077 is 17% more, than GeForce GT 640.
low / 768p
70−75
110−120
medium / 768p
50−55
100−110
ultra / 1080p
27−30
75−80
The average gaming FPS of Radeon HD 7970M in Dota 2 is 94% more, than GeForce GT 640.
high / 1080p
3−4
21−24
ultra / 1080p
3−4
20−22
QHD / 1440p
−
18−20
4K / 2160p
2−3
7−8
low / 720p
14−16
45−50
medium / 1080p
4−5
24−27
The average gaming FPS of Radeon HD 7970M in Far Cry 5 is 380% more, than GeForce GT 640.
high / 1080p
10−12
30−33
ultra / 1080p
5−6
21−24
QHD / 1440p
2−3
14−16
low / 720p
50−55
110−120
medium / 1080p
16−18
65−70
The average gaming FPS of Radeon HD 7970M in Fortnite is 194% more, than GeForce GT 640.
high / 1080p
6−7
30−35
ultra / 1080p
−
24−27
QHD / 1440p
4−5
12−14
4K / 2160p
2−3
12−14
low / 720p
21−24
60−65
medium / 1080p
9−10
35−40
The average gaming FPS of Radeon HD 7970M in Forza Horizon 4 is 244% more, than GeForce GT 640.
low / 768p
45−50
95−100
medium / 768p
−
85−90
high / 1080p
7−8
35−40
ultra / 1080p
3−4
14−16
QHD / 1440p
0−1
5−6
medium / 720p
40−45
−
The average gaming FPS of Radeon HD 7970M in Grand Theft Auto V is 163% more, than GeForce GT 640.
high / 1080p
2−3
12−14
ultra / 1080p
0−1
9−10
4K / 2160p
0−1
2−3
low / 720p
8−9
35−40
medium / 1080p
4−5
16−18
The average gaming FPS of Radeon HD 7970M in Metro Exodus is 340% more, than GeForce GT 640.
low / 768p
80−85
110−120
ultra / 1080p
70−75
−
medium / 1080p
−
110−120
The average gaming FPS of Radeon HD 7970M in Minecraft is 40% more, than GeForce GT 640.
ultra / 1080p
12−14
14−16
low / 720p
27−30
65−70
medium / 1080p
14−16
18−20
The average gaming FPS of Radeon HD 7970M in PLAYERUNKNOWN'S BATTLEGROUNDS is 83% more, than GeForce GT 640.
high / 1080p
6−7
14−16
ultra / 1080p
4−5
9−10
QHD / 1440p
0−1
0−1
low / 720p
7−8
35−40
medium / 1080p
−
18−20
The average gaming FPS of Radeon HD 7970M in Red Dead Redemption 2 is 233% more, than GeForce GT 640.
low / 768p
14−16
65−70
medium / 768p
10−11
40−45
high / 1080p
5−6
21−24
ultra / 1080p
4−5
12−14
4K / 2160p
0−1
7−8
The average gaming FPS of Radeon HD 7970M in The Witcher 3: Wild Hunt is 350% more, than GeForce GT 640.
low / 768p
70−75
90−95
medium / 768p
35−40
60−65
ultra / 1080p
16−18
40−45
high / 768p
30−35
55−60
The average gaming FPS of Radeon HD 7970M in World of Tanks is 61% more, than GeForce GT 640.
Full Specs
GeForce GT 640
Radeon HD 7970M
Architecture
Kepler
GCN
Code name
GK107
Wimbledon XT
Type
Desktop
Laptop
Release date
5 June 2012
1 May 2012
Pipelines
384
1280
Core clock speed
902 MHz
850 MHz
Transistor count
1,270 million
2,800 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
28.86
68.00
Floating-point performance
692.7 gflops
2,176 gflops
Length
145 mm
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
4800 MHz
Memory bandwidth
28.51 GB/s
153.6 GB/s
Shared memory
-
DirectX
12 (11_0)
12 (11_1)
Shader Model
5.1
5.1
OpenGL
4.6
4.6
OpenCL
1.2
1.2
Vulkan
1.1.126
1.2.131
CUDA
3.0
Bitcoin / BTC (SHA256)
24 Mh/s
254 Mh/s
Laptop size
large
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