GeForce GT 640 vs GeForce GTX 680MX
Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640 and GeForce GTX 680MX. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GT 640 and GeForce GTX 680MX. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.
GeForce GTX 680MX is a Laptop Graphics Card
Note: GeForce GTX 680MX 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 680MX here:
Main Specs
GeForce GT 640
GeForce GTX 680MX
Power consumption (TDP)
65 Watt
122 Watt
Interface
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
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GeForce GTX 680MX has 87% more power consumption, than GeForce GT 640.
GeForce GT 640 and GeForce GTX 680MX have maximum RAM of 2 GB.
GeForce GT 640 is used in Desktops, and GeForce GTX 680MX - in Laptops.
GeForce GT 640 and GeForce GTX 680MX are build with Kepler architecture.
Core clock speed of GeForce GT 640 is 182 MHz higher, than GeForce GTX 680MX.
GeForce GT 640 and GeForce GTX 680MX are manufactured by 28 nm process technology.
Memory clock speed of GeForce GTX 680MX is 718 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
21−24
ultra / 1080p
1−2
12−14
QHD / 1440p
0−1
7−8
4K / 2160p
−
5−6
low / 720p
14−16
40−45
medium / 1080p
5−6
27−30
The average gaming FPS of GeForce GTX 680MX in Assassin's Creed Odyssey is 333% more, than GeForce GT 640.
high / 1080p
7−8
35−40
ultra / 1080p
5−6
30−33
QHD / 1440p
0−1
14−16
4K / 2160p
−
9−10
low / 720p
20−22
70−75
medium / 1080p
7−8
40−45
The average gaming FPS of GeForce GTX 680MX in Battlefield 5 is 360% 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 680MX have the same average FPS in Call of Duty: Warzone.
low / 768p
110−120
230−240
medium / 768p
90−95
200−210
ultra / 1080p
45−50
120−130
QHD / 1440p
24−27
100−110
4K / 2160p
18−20
55−60
high / 768p
65−70
170−180
The average gaming FPS of GeForce GTX 680MX in Counter-Strike: Global Offensive is 145% more, than GeForce GT 640.
low / 768p
70−75
60−65
ultra / 1080p
21−24
50−55
medium / 1080p
45−50
55−60
The average gaming FPS of GeForce GTX 680MX in Cyberpunk 2077 is 21% more, than GeForce GT 640.
low / 768p
70−75
120−130
medium / 768p
50−55
110−120
ultra / 1080p
27−30
80−85
The average gaming FPS of GeForce GTX 680MX in Dota 2 is 109% more, than GeForce GT 640.
high / 1080p
3−4
27−30
ultra / 1080p
3−4
24−27
QHD / 1440p
−
20−22
4K / 2160p
2−3
8−9
low / 720p
14−16
55−60
medium / 1080p
4−5
27−30
The average gaming FPS of GeForce GTX 680MX in Far Cry 5 is 480% more, than GeForce GT 640.
high / 1080p
10−12
35−40
ultra / 1080p
5−6
27−30
QHD / 1440p
2−3
16−18
low / 720p
50−55
130−140
medium / 1080p
16−18
75−80
The average gaming FPS of GeForce GTX 680MX in Fortnite is 247% more, than GeForce GT 640.
high / 1080p
6−7
35−40
ultra / 1080p
−
27−30
QHD / 1440p
4−5
16−18
4K / 2160p
2−3
14−16
low / 720p
21−24
70−75
medium / 1080p
9−10
40−45
The average gaming FPS of GeForce GTX 680MX in Forza Horizon 4 is 300% more, than GeForce GT 640.
low / 768p
45−50
100−110
medium / 768p
−
95−100
high / 1080p
7−8
40−45
ultra / 1080p
3−4
18−20
QHD / 1440p
0−1
8−9
medium / 720p
40−45
−
The average gaming FPS of GeForce GTX 680MX in Grand Theft Auto V is 189% more, than GeForce GT 640.
high / 1080p
2−3
14−16
ultra / 1080p
0−1
10−12
QHD / 1440p
−
10−12
4K / 2160p
0−1
3−4
low / 720p
8−9
40−45
medium / 1080p
4−5
18−20
The average gaming FPS of GeForce GTX 680MX in Metro Exodus is 400% 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 680MX in Minecraft is 52% more, than GeForce GT 640.
ultra / 1080p
12−14
14−16
low / 720p
27−30
75−80
medium / 1080p
14−16
18−20
The average gaming FPS of GeForce GTX 680MX in PLAYERUNKNOWN'S BATTLEGROUNDS is 105% more, than GeForce GT 640.
high / 1080p
6−7
16−18
ultra / 1080p
4−5
10−12
QHD / 1440p
0−1
2−3
4K / 2160p
−
2−3
low / 720p
7−8
40−45
medium / 1080p
−
21−24
The average gaming FPS of GeForce GTX 680MX in Red Dead Redemption 2 is 283% more, than GeForce GT 640.
low / 768p
14−16
80−85
medium / 768p
10−11
50−55
high / 1080p
5−6
27−30
ultra / 1080p
4−5
14−16
4K / 2160p
0−1
9−10
The average gaming FPS of GeForce GTX 680MX in The Witcher 3: Wild Hunt is 450% 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 GeForce GTX 680MX in World of Tanks is 61% more, than GeForce GT 640.
Full Specs
GeForce GT 640
GeForce GTX 680MX
Architecture
Kepler
Kepler
Code name
GK107
Type
Desktop
Laptop
Release date
5 June 2012
23 October 2012
Pipelines
384
1536
Core clock speed
902 MHz
720 MHz
Transistor count
1,270 million
3540 Million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
28.86
92.2 billion/sec
Floating-point performance
692.7 gflops
Length
145 mm
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
2500 MHz
Memory bandwidth
28.51 GB/s
160 GB/s
Shared memory
-
DirectX
12 (11_0)
12 API
Shader Model
5.1
OpenGL
4.6
4.5
OpenCL
1.2
1.1
Vulkan
1.1.126
CUDA
3.0
+
CUDA cores
1536
Bus support
PCI Express 3.0
SLI options
+
3D Vision
+
Bitcoin / BTC (SHA256)
24 Mh/s
57 Mh/s
Laptop size
large
Optimus
+
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