GeForce GT 640 vs GeForce GTX 770M SLI
When comparing GeForce GT 640 and GeForce GTX 770M SLI, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GT 640 and GeForce GTX 770M SLI is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
GeForce GTX 770M SLI is a Laptop Graphics Card
Note: GeForce GTX 770M 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 770M SLI here:
Main Specs
GeForce GT 640
GeForce GTX 770M SLI
Power consumption (TDP)
65 Watt
150 Watt
Interface
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2x 3 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
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GeForce GTX 770M SLI has 130% more power consumption, than GeForce GT 640.
GeForce GT 640 and GeForce GTX 770M SLI have maximum RAM of 2 GB.
GeForce GT 640 is used in Desktops, and GeForce GTX 770M SLI - in Laptops.
GeForce GT 640 and GeForce GTX 770M SLI are build with Kepler architecture.
Core clock speed of GeForce GT 640 is 91 MHz higher, than GeForce GTX 770M SLI.
GeForce GT 640 and GeForce GTX 770M SLI are manufactured by 28 nm process technology.
Memory clock speed of GeForce GTX 770M SLI is 2218 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
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 770M SLI in Assassin's Creed Odyssey is 400% more, than GeForce GT 640.
high / 1080p
7−8
40−45
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 770M SLI in Battlefield 5 is 410% 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M 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 770M SLI in World of Tanks is 66% more, than GeForce GT 640.
Full Specs
GeForce GT 640
GeForce GTX 770M SLI
Architecture
Kepler
Kepler
Code name
GK107
Type
Desktop
Laptop
Release date
5 June 2012
30 May 2013
Pipelines
384
1920
Core clock speed
902 MHz
811 MHz
Transistor count
1,270 million
2x 2540 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 192 Bit
Memory clock speed
1782 MHz
4000 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
+
SLI options
+
Bitcoin / BTC (SHA256)
24 Mh/s
Laptop size
large
Optimus
+
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