GeForce GT 640 vs GeForce GTX 580M SLI
When choosing between GeForce GT 640 and GeForce GTX 580M SLI, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GT 640 and GeForce GTX 580M SLI.
GeForce GTX 580M SLI is a Laptop Graphics Card
Note: GeForce GTX 580M SLI 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 GTX 580M SLI here:
Main Specs
GeForce GT 640
GeForce GTX 580M SLI
Power consumption (TDP)
65 Watt
100 Watt
Interface
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
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GeForce GTX 580M SLI has 53% more power consumption, than GeForce GT 640.
GeForce GT 640 is used in Desktops, and GeForce GTX 580M SLI - in Laptops.
GeForce GT 640 is build with Kepler architecture, and GeForce GTX 580M SLI - with Fermi.
Core clock speed of GeForce GT 640 is 282 MHz higher, than GeForce GTX 580M SLI.
GeForce GT 640 is manufactured by 28 nm process technology, and GeForce GTX 580M SLI - by 40 nm process technology.
Memory clock speed of GeForce GT 640 is 282 MHz higher, than GeForce GTX 580M SLI.
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
10−11
4K / 2160p
−
6−7
low / 720p
14−16
45−50
medium / 1080p
5−6
30−35
The average gaming FPS of GeForce GTX 580M SLI in Assassin's Creed Odyssey is 400% more, than GeForce GT 640.
high / 1080p
7−8
35−40
ultra / 1080p
5−6
30−35
QHD / 1440p
0−1
18−20
4K / 2160p
−
10−12
low / 720p
20−22
80−85
medium / 1080p
7−8
45−50
The average gaming FPS of GeForce GTX 580M SLI in Battlefield 5 is 400% 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 GeForce GTX 580M SLI 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
140−150
QHD / 1440p
24−27
110−120
4K / 2160p
18−20
60−65
high / 768p
65−70
180−190
The average gaming FPS of GeForce GTX 580M SLI in Counter-Strike: Global Offensive is 163% 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 GeForce GTX 580M SLI have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
120−130
medium / 768p
50−55
110−120
ultra / 1080p
27−30
90−95
The average gaming FPS of GeForce GTX 580M SLI in Dota 2 is 115% more, than GeForce GT 640.
high / 1080p
3−4
30−35
ultra / 1080p
3−4
27−30
QHD / 1440p
−
21−24
4K / 2160p
2−3
10−11
low / 720p
14−16
60−65
medium / 1080p
4−5
30−35
The average gaming FPS of GeForce GTX 580M SLI in Far Cry 5 is 560% more, than GeForce GT 640.
high / 1080p
10−12
40−45
ultra / 1080p
5−6
30−35
QHD / 1440p
2−3
18−20
low / 720p
50−55
140−150
medium / 1080p
16−18
85−90
The average gaming FPS of GeForce GTX 580M SLI in Fortnite is 282% more, than GeForce GT 640.
high / 1080p
6−7
40−45
ultra / 1080p
−
30−35
QHD / 1440p
4−5
18−20
4K / 2160p
2−3
16−18
low / 720p
21−24
80−85
medium / 1080p
9−10
45−50
The average gaming FPS of GeForce GTX 580M SLI in Forza Horizon 4 is 355% more, than GeForce GT 640.
low / 768p
45−50
110−120
medium / 768p
−
100−110
high / 1080p
7−8
50−55
ultra / 1080p
3−4
21−24
QHD / 1440p
0−1
10−12
medium / 720p
40−45
−
The average gaming FPS of GeForce GTX 580M SLI in Grand Theft Auto V is 231% more, than GeForce GT 640.
high / 1080p
2−3
16−18
ultra / 1080p
0−1
12−14
QHD / 1440p
−
12−14
4K / 2160p
0−1
4−5
low / 720p
8−9
45−50
medium / 1080p
4−5
21−24
The average gaming FPS of GeForce GTX 580M SLI in Metro Exodus is 480% more, than GeForce GT 640.
low / 768p
80−85
120−130
ultra / 1080p
70−75
−
medium / 1080p
−
110−120
The average gaming FPS of GeForce GTX 580M SLI in Minecraft is 52% more, than GeForce GT 640.
ultra / 1080p
12−14
14−16
low / 720p
27−30
80−85
medium / 1080p
14−16
18−20
The average gaming FPS of GeForce GTX 580M SLI in PLAYERUNKNOWN'S BATTLEGROUNDS is 111% more, than GeForce GT 640.
high / 1080p
6−7
18−20
ultra / 1080p
4−5
12−14
QHD / 1440p
0−1
4−5
4K / 2160p
−
3−4
low / 720p
7−8
45−50
medium / 1080p
−
24−27
The average gaming FPS of GeForce GTX 580M SLI in Red Dead Redemption 2 is 333% more, than GeForce GT 640.
low / 768p
14−16
90−95
medium / 768p
10−11
55−60
high / 1080p
5−6
30−35
ultra / 1080p
4−5
18−20
4K / 2160p
0−1
10−11
The average gaming FPS of GeForce GTX 580M SLI in The Witcher 3: Wild Hunt is 525% 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 GeForce GTX 580M SLI in World of Tanks is 66% more, than GeForce GT 640.
Full Specs
GeForce GT 640
GeForce GTX 580M SLI
Architecture
Kepler
Fermi
Code name
GK107
N12E-GTX2
Type
Desktop
Laptop
Release date
5 June 2012
6 January 2011
Pipelines
384
768
Core clock speed
902 MHz
620 MHz
Transistor count
1,270 million
Manufacturing process technology
28 nm
40 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
1500 MHz
Memory bandwidth
28.51 GB/s
Shared memory
-
DirectX
12 (11_0)
DirectX 11, Shader 5.0
Shader Model
5.1
OpenGL
4.6
OpenCL
1.2
Vulkan
1.1.126
CUDA
3.0
Bitcoin / BTC (SHA256)
24 Mh/s
Laptop size
large
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