GeForce GT 640M vs GeForce GTX 770M SLI
When choosing between GeForce GT 640M and GeForce GTX 770M 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 640M and GeForce GTX 770M SLI.
GeForce GT 640M and GeForce GTX 770M SLI are Laptop Graphics Cards
Note: GeForce GT 640M and GeForce GTX 770M SLI are only used in laptop graphics. They have 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 or GeForce GTX 770M SLI here:
Main Specs
GeForce GT 640M
GeForce GTX 770M SLI
Power consumption (TDP)
32 Watt
150 Watt
Interface
PCIe 3.0 x16
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
2x 3 GB
Display Connectors
No outputs
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GeForce GTX 770M SLI has 368% more power consumption, than GeForce GT 640M.
GeForce GT 640M and GeForce GTX 770M SLI have maximum RAM of 2 GB.
Both cards are used in Laptops.
GeForce GT 640M and GeForce GTX 770M SLI are build with Kepler architecture.
GeForce GT 640M and GeForce GTX 770M SLI are manufactured by 28 nm process technology.
Memory clock speed of GeForce GTX 770M SLI is 2200 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
10−11
4K / 2160p
−
6−7
low / 720p
10−12
45−50
medium / 1080p
2−3
30−35
The average gaming FPS of GeForce GTX 770M SLI in Assassin's Creed Odyssey is 566% more, than GeForce GT 640M.
high / 1080p
−
40−45
ultra / 1080p
3−4
30−35
QHD / 1440p
0−1
18−20
4K / 2160p
−
10−12
low / 720p
12−14
80−85
medium / 1080p
4−5
45−50
The average gaming FPS of GeForce GTX 770M SLI in Battlefield 5 is 671% 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 GeForce GTX 770M SLI 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
140−150
QHD / 1440p
−
110−120
4K / 2160p
10−11
60−65
high / 768p
55−60
180−190
The average gaming FPS of GeForce GTX 770M SLI in Counter-Strike: Global Offensive is 178% 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 GeForce GTX 770M SLI have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
120−130
medium / 768p
40−45
110−120
ultra / 1080p
18−20
90−95
The average gaming FPS of GeForce GTX 770M SLI in Dota 2 is 150% more, than GeForce GT 640M.
high / 1080p
2−3
30−35
ultra / 1080p
2−3
27−30
QHD / 1440p
−
21−24
4K / 2160p
0−1
10−11
low / 720p
9−10
60−65
medium / 1080p
3−4
30−35
The average gaming FPS of GeForce GTX 770M SLI in Far Cry 5 is 875% more, than GeForce GT 640M.
high / 1080p
−
40−45
ultra / 1080p
5−6
30−35
QHD / 1440p
1−2
18−20
low / 720p
45−50
140−150
medium / 1080p
7−8
85−90
The average gaming FPS of GeForce GTX 770M SLI in Fortnite is 373% more, than GeForce GT 640M.
high / 1080p
2−3
40−45
ultra / 1080p
−
30−35
QHD / 1440p
0−1
18−20
4K / 2160p
−
16−18
low / 720p
14−16
80−85
medium / 1080p
5−6
45−50
The average gaming FPS of GeForce GTX 770M SLI in Forza Horizon 4 is 714% more, than GeForce GT 640M.
low / 768p
40−45
110−120
medium / 768p
−
100−110
high / 1080p
3−4
50−55
ultra / 1080p
2−3
21−24
QHD / 1440p
0−1
10−12
medium / 720p
30−35
−
The average gaming FPS of GeForce GTX 770M SLI in Grand Theft Auto V is 293% more, than GeForce GT 640M.
high / 1080p
1−2
16−18
ultra / 1080p
0−1
12−14
QHD / 1440p
−
12−14
4K / 2160p
0−1
4−5
low / 720p
2−3
45−50
medium / 1080p
2−3
21−24
The average gaming FPS of GeForce GTX 770M SLI in Metro Exodus is 1350% more, than GeForce GT 640M.
low / 768p
85−90
120−130
high / 1080p
55−60
−
medium / 1080p
−
110−120
The average gaming FPS of GeForce GTX 770M SLI in Minecraft is 43% more, than GeForce GT 640M.
high / 1080p
14−16
−
ultra / 1080p
12−14
14−16
low / 720p
24−27
80−85
medium / 1080p
14−16
18−20
The average gaming FPS of GeForce GTX 770M SLI in PLAYERUNKNOWN'S BATTLEGROUNDS is 123% more, than GeForce GT 640M.
high / 1080p
−
18−20
ultra / 1080p
3−4
12−14
QHD / 1440p
0−1
4−5
4K / 2160p
−
3−4
low / 720p
3−4
45−50
medium / 1080p
−
24−27
The average gaming FPS of GeForce GTX 770M SLI in Red Dead Redemption 2 is 900% more, than GeForce GT 640M.
low / 768p
7−8
90−95
medium / 768p
6−7
55−60
high / 1080p
3−4
30−35
ultra / 1080p
−
18−20
4K / 2160p
0−1
10−11
The average gaming FPS of GeForce GTX 770M SLI in The Witcher 3: Wild Hunt is 1100% 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 GeForce GTX 770M SLI in World of Tanks is 75% more, than GeForce GT 640M.
Full Specs
GeForce GT 640M
GeForce GTX 770M SLI
Architecture
Kepler
Kepler
Code name
N13P-GS
Type
Laptop
Laptop
Release date
22 March 2012
30 May 2013
Pipelines
384
1920
Core clock speed
811 MHz
Boost Clock
645 MHz
Transistor count
1,270 million
2x 2540 Million
Manufacturing process technology
28 nm
28 nm
Floating-point performance
480.0 gflops
Memory bus width
128bit
2x 192 Bit
Memory clock speed
1800 - 4000 MHz
4000 MHz
Shared memory
-
-
DirectX
12 API
DirectX 11, Shader 5.0
Shader Model
5.1
OpenGL
4.5
OpenCL
1.1
Vulkan
1.1.126
CUDA
+
+
CUDA cores
384
Bus support
PCI Express 2.0, PCI Express 3.0
SLI options
+
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
18 Mh/s
Laptop size
medium sized
large
Optimus
+
+
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