GeForce GT 640 vs GeForce GT 755M SLI
In this comparison between GeForce GT 640 and GeForce GT 755M SLI 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 GeForce GT 755M SLI will be their preference. Study the comparison tables below and make your choice.
GeForce GT 755M SLI is a Laptop Graphics Card
Note: GeForce GT 755M 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 GT 755M SLI here:
Main Specs
GeForce GT 640
GeForce GT 755M SLI
Power consumption (TDP)
65 Watt
2x ~50 Watt
Interface
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2x 2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
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GeForce GT 640 has 3150% more power consumption, than GeForce GT 755M SLI.
GeForce GT 640 and GeForce GT 755M SLI have maximum RAM of 2 GB.
GeForce GT 640 is used in Desktops, and GeForce GT 755M SLI - in Laptops.
GeForce GT 640 and GeForce GT 755M SLI are build with Kepler architecture.
Core clock speed of GeForce GT 755M SLI is 78 MHz higher, than GeForce GT 640.
GeForce GT 640 and GeForce GT 755M SLI are manufactured by 28 nm process technology.
Memory clock speed of GeForce GT 755M SLI is 3618 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
14−16
ultra / 1080p
1−2
8−9
QHD / 1440p
0−1
2−3
low / 720p
14−16
30−35
medium / 1080p
5−6
18−20
The average gaming FPS of GeForce GT 755M SLI in Assassin's Creed Odyssey is 200% more, than GeForce GT 640.
high / 1080p
7−8
21−24
ultra / 1080p
5−6
18−20
QHD / 1440p
0−1
2−3
low / 720p
20−22
50−55
medium / 1080p
7−8
24−27
The average gaming FPS of GeForce GT 755M SLI in Battlefield 5 is 190% more, than GeForce GT 640.
low / 768p
50−55
50−55
high / 1080p
35−40
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 755M SLI in Call of Duty: Warzone is 11% more, than GeForce GT 640.
low / 768p
110−120
200−210
medium / 768p
90−95
170−180
ultra / 1080p
45−50
90−95
QHD / 1440p
24−27
50−55
4K / 2160p
18−20
24−27
high / 768p
65−70
140−150
The average gaming FPS of GeForce GT 755M SLI in Counter-Strike: Global Offensive is 88% more, than GeForce GT 640.
low / 768p
70−75
60−65
ultra / 1080p
21−24
40−45
medium / 1080p
45−50
55−60
The average gaming FPS of GeForce GT 755M SLI in Cyberpunk 2077 is 14% more, than GeForce GT 640.
low / 768p
70−75
110−120
medium / 768p
50−55
95−100
ultra / 1080p
27−30
60−65
The average gaming FPS of GeForce GT 755M SLI in Dota 2 is 78% more, than GeForce GT 640.
high / 1080p
3−4
16−18
ultra / 1080p
3−4
14−16
4K / 2160p
2−3
5−6
low / 720p
14−16
35−40
medium / 1080p
4−5
18−20
The average gaming FPS of GeForce GT 755M SLI in Far Cry 5 is 260% more, than GeForce GT 640.
high / 1080p
10−12
24−27
ultra / 1080p
5−6
18−20
QHD / 1440p
2−3
12−14
low / 720p
50−55
95−100
medium / 1080p
16−18
50−55
The average gaming FPS of GeForce GT 755M SLI in Fortnite is 141% more, than GeForce GT 640.
high / 1080p
6−7
24−27
ultra / 1080p
−
18−20
QHD / 1440p
4−5
7−8
4K / 2160p
2−3
−
low / 720p
21−24
50−55
medium / 1080p
9−10
27−30
The average gaming FPS of GeForce GT 755M SLI in Forza Horizon 4 is 180% more, than GeForce GT 640.
low / 768p
45−50
85−90
medium / 768p
−
75−80
high / 1080p
7−8
27−30
ultra / 1080p
3−4
10−12
QHD / 1440p
0−1
1−2
medium / 720p
40−45
−
The average gaming FPS of GeForce GT 755M SLI in Grand Theft Auto V is 121% more, than GeForce GT 640.
high / 1080p
2−3
9−10
ultra / 1080p
0−1
7−8
4K / 2160p
0−1
0−1
low / 720p
8−9
27−30
medium / 1080p
4−5
12−14
The average gaming FPS of GeForce GT 755M SLI in Metro Exodus is 240% more, than GeForce GT 640.
low / 768p
80−85
110−120
ultra / 1080p
70−75
100−110
medium / 1080p
−
100−110
The average gaming FPS of GeForce GT 755M SLI in Minecraft is 42% more, than GeForce GT 640.
ultra / 1080p
12−14
14−16
low / 720p
27−30
55−60
medium / 1080p
14−16
18−20
The average gaming FPS of GeForce GT 755M SLI in PLAYERUNKNOWN'S BATTLEGROUNDS is 66% more, than GeForce GT 640.
high / 1080p
6−7
12−14
ultra / 1080p
4−5
8−9
QHD / 1440p
0−1
0−1
low / 720p
7−8
27−30
medium / 1080p
−
16−18
The average gaming FPS of GeForce GT 755M SLI in Red Dead Redemption 2 is 166% more, than GeForce GT 640.
low / 768p
14−16
50−55
medium / 768p
10−11
30−35
high / 1080p
5−6
18−20
ultra / 1080p
4−5
10−11
4K / 2160p
0−1
6−7
The average gaming FPS of GeForce GT 755M SLI in The Witcher 3: Wild Hunt is 250% more, than GeForce GT 640.
low / 768p
70−75
90−95
medium / 768p
35−40
60−65
ultra / 1080p
16−18
30−35
high / 768p
30−35
50−55
The average gaming FPS of GeForce GT 755M SLI in World of Tanks is 53% more, than GeForce GT 640.
Full Specs
GeForce GT 640
GeForce GT 755M SLI
Architecture
Kepler
Kepler
Code name
GK107
N14P-?
Type
Desktop
Laptop
Release date
5 June 2012
1 November 2013
Pipelines
384
768
Core clock speed
902 MHz
980 MHz
Transistor count
1,270 million
2x 1300 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
2x 128 Bit
Memory clock speed
1782 MHz
5400 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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