GeForce 845M vs GeForce GT 640
When comparing GeForce 845M and GeForce GT 640, 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 845M and GeForce GT 640 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
GeForce 845M is a Laptop Graphics Card
Note: GeForce 845M 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 845M here:
Main Specs
GeForce 845M
GeForce GT 640
Power consumption (TDP)
45 Watt
65 Watt
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3, GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x DisplayPort
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GeForce GT 640 has 44% more power consumption, than GeForce 845M.
GeForce 845M is connected by PCIe 3.0 x8, and GeForce GT 640 uses PCIe 3.0 x16 interface.
GeForce 845M and GeForce GT 640 have maximum RAM of 2 GB.
GeForce 845M is used in Laptops, and GeForce GT 640 - in Desktops.
GeForce 845M is build with Maxwell architecture, and GeForce GT 640 - with Kepler.
Core clock speed of GeForce 845M is 169 MHz higher, than GeForce GT 640.
GeForce 845M and GeForce GT 640 are manufactured by 28 nm process technology.
Memory clock speed of GeForce 845M is 218 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
3−4
2−3
ultra / 1080p
1−2
1−2
QHD / 1440p
0−1
0−1
low / 720p
14−16
14−16
medium / 1080p
6−7
5−6
GeForce 845M and GeForce GT 640 have the same average FPS in Assassin's Creed Odyssey.
high / 1080p
10−11
7−8
ultra / 1080p
7−8
5−6
QHD / 1440p
0−1
0−1
low / 720p
21−24
20−22
medium / 1080p
10−11
7−8
The average gaming FPS of GeForce 845M in Battlefield 5 is 20% more, than GeForce GT 640.
low / 768p
45−50
50−55
high / 1080p
40−45
35−40
QHD / 1440p
0−1
0−1
GeForce 845M and GeForce GT 640 have the same average FPS in Call of Duty: Warzone.
low / 768p
130−140
110−120
medium / 768p
100−110
90−95
ultra / 1080p
50−55
45−50
QHD / 1440p
24−27
24−27
4K / 2160p
12−14
18−20
high / 768p
75−80
65−70
The average gaming FPS of GeForce 845M in Counter-Strike: Global Offensive is 11% more, than GeForce GT 640.
low / 768p
85−90
70−75
ultra / 1080p
21−24
21−24
medium / 1080p
45−50
45−50
The average gaming FPS of GeForce 845M in Cyberpunk 2077 is 10% more, than GeForce GT 640.
low / 768p
75−80
70−75
medium / 768p
50−55
50−55
ultra / 1080p
30−33
27−30
The average gaming FPS of GeForce 845M in Dota 2 is 3% more, than GeForce GT 640.
high / 1080p
4−5
3−4
ultra / 1080p
4−5
3−4
4K / 2160p
2−3
2−3
low / 720p
14−16
14−16
medium / 1080p
6−7
4−5
The average gaming FPS of GeForce 845M in Far Cry 5 is 20% more, than GeForce GT 640.
high / 1080p
6−7
10−12
ultra / 1080p
0−1
5−6
QHD / 1440p
0−1
2−3
low / 720p
55−60
50−55
medium / 1080p
16−18
16−18
The average gaming FPS of GeForce 845M in Fortnite is 3% more, than GeForce GT 640.
high / 1080p
9−10
6−7
ultra / 1080p
8−9
−
QHD / 1440p
3−4
4−5
4K / 2160p
3−4
2−3
low / 720p
21−24
21−24
medium / 1080p
10−12
9−10
The average gaming FPS of GeForce 845M in Forza Horizon 4 is 11% more, than GeForce GT 640.
low / 768p
50−55
45−50
high / 1080p
10−11
7−8
ultra / 1080p
4−5
3−4
QHD / 1440p
−
0−1
medium / 720p
40−45
40−45
The average gaming FPS of GeForce 845M in Grand Theft Auto V is 8% more, than GeForce GT 640.
high / 1080p
3−4
2−3
ultra / 1080p
1−2
0−1
4K / 2160p
−
0−1
low / 720p
10−11
8−9
medium / 1080p
4−5
4−5
The average gaming FPS of GeForce 845M in Metro Exodus is 20% more, than GeForce GT 640.
low / 768p
90−95
80−85
high / 1080p
65−70
−
ultra / 1080p
−
70−75
medium / 1080p
90−95
−
The average gaming FPS of GeForce 845M in Minecraft is 12% more, than GeForce GT 640.
high / 1080p
5−6
−
ultra / 1080p
1−2
12−14
4K / 2160p
0−1
−
low / 720p
27−30
27−30
medium / 1080p
9−10
14−16
The average gaming FPS of GeForce GT 640 in PLAYERUNKNOWN'S BATTLEGROUNDS is 38% more, than GeForce 845M.
high / 1080p
−
6−7
ultra / 1080p
−
4−5
QHD / 1440p
−
0−1
low / 720p
10−11
7−8
medium / 1080p
8−9
−
The average gaming FPS of GeForce 845M in Red Dead Redemption 2 is 42% more, than GeForce GT 640.
low / 768p
20−22
14−16
medium / 768p
12−14
10−11
high / 1080p
6−7
5−6
ultra / 1080p
4−5
4−5
4K / 2160p
3−4
0−1
The average gaming FPS of GeForce 845M in The Witcher 3: Wild Hunt is 37% more, than GeForce GT 640.
low / 768p
75−80
70−75
medium / 768p
40−45
35−40
ultra / 1080p
16−18
16−18
high / 768p
30−35
30−35
The average gaming FPS of GeForce 845M in World of Tanks is 7% more, than GeForce GT 640.
Full Specs
GeForce 845M
GeForce GT 640
Architecture
Maxwell
Kepler
Code name
GM108
GK107
Type
Laptop
Desktop
Release date
12 March 2014
5 June 2012
Pipelines
384
384
Core clock speed
1071 MHz
902 MHz
Boost Clock
1150 MHz
Transistor count
1,870 million
1,270 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
37.63
28.86
Floating-point performance
883.7 gflops
692.7 gflops
Length
145 mm
Memory bus width
64/128 Bit
128 Bit
Memory clock speed
2000 - 5000 MHz
1782 MHz
Memory bandwidth
40.1 GB/s
28.51 GB/s
Shared memory
-
DirectX
12 (11_0)
12 (11_0)
Shader Model
5.1
5.1
OpenGL
4.6
4.6
OpenCL
1.2
1.2
Vulkan
1.1.126
1.1.126
CUDA
+
3.0
Bitcoin / BTC (SHA256)
76 Mh/s
24 Mh/s
Laptop size
medium sized
Optimus
+
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