GeForce GT 640 vs GeForce GTX 850M
When comparing GeForce GT 640 and GeForce GTX 850M, 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 850M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
GeForce GTX 850M is a Laptop Graphics Card
Note: GeForce GTX 850M 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 850M here:
Main Specs
GeForce GT 640
GeForce GTX 850M
Power consumption (TDP)
65 Watt
45 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3
DDR3, GDDR5
Maximum RAM amount
2 GB
4 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
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GeForce GT 640 has 44% more power consumption, than GeForce GTX 850M.
Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
GeForce GTX 850M has 2 GB more memory, than GeForce GT 640.
GeForce GT 640 is used in Desktops, and GeForce GTX 850M - in Laptops.
GeForce GT 640 is build with Kepler architecture, and GeForce GTX 850M - with Maxwell.
GeForce GT 640 and GeForce GTX 850M are manufactured by 28 nm process technology.
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
12−14
ultra / 1080p
1−2
8−9
QHD / 1440p
0−1
2−3
low / 720p
14−16
27−30
medium / 1080p
5−6
16−18
The average gaming FPS of GeForce GTX 850M in Assassin's Creed Odyssey is 166% more, than GeForce GT 640.
high / 1080p
7−8
21−24
ultra / 1080p
5−6
18−20
QHD / 1440p
0−1
4−5
4K / 2160p
−
4−5
low / 720p
20−22
45−50
medium / 1080p
7−8
21−24
The average gaming FPS of GeForce GTX 850M in Battlefield 5 is 170% more, than GeForce GT 640.
low / 768p
50−55
45−50
high / 1080p
35−40
−
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 640 in Call of Duty: Warzone is 10% more, than GeForce GTX 850M.
low / 768p
110−120
190−200
medium / 768p
90−95
160−170
ultra / 1080p
45−50
85−90
QHD / 1440p
24−27
50−55
4K / 2160p
18−20
30−33
high / 768p
65−70
120−130
The average gaming FPS of GeForce GTX 850M in Counter-Strike: Global Offensive is 78% more, than GeForce GT 640.
low / 768p
70−75
55−60
ultra / 1080p
21−24
35−40
medium / 1080p
45−50
45−50
GeForce GT 640 and GeForce GTX 850M have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
100−110
medium / 768p
50−55
85−90
ultra / 1080p
27−30
55−60
The average gaming FPS of GeForce GTX 850M in Dota 2 is 62% more, than GeForce GT 640.
high / 1080p
3−4
14−16
ultra / 1080p
3−4
14−16
4K / 2160p
2−3
5−6
low / 720p
14−16
35−40
medium / 1080p
4−5
16−18
The average gaming FPS of GeForce GTX 850M in Far Cry 5 is 260% more, than GeForce GT 640.
high / 1080p
10−12
21−24
ultra / 1080p
5−6
16−18
QHD / 1440p
2−3
16−18
low / 720p
50−55
90−95
medium / 1080p
16−18
45−50
The average gaming FPS of GeForce GTX 850M in Fortnite is 129% more, than GeForce GT 640.
high / 1080p
6−7
21−24
ultra / 1080p
−
18−20
QHD / 1440p
4−5
7−8
4K / 2160p
2−3
−
low / 720p
21−24
45−50
medium / 1080p
9−10
24−27
The average gaming FPS of GeForce GTX 850M in Forza Horizon 4 is 150% more, than GeForce GT 640.
low / 768p
45−50
75−80
medium / 768p
−
70−75
high / 1080p
7−8
24−27
ultra / 1080p
3−4
10−12
QHD / 1440p
0−1
1−2
medium / 720p
40−45
−
The average gaming FPS of GeForce GTX 850M in Grand Theft Auto V is 100% more, than GeForce GT 640.
high / 1080p
2−3
8−9
ultra / 1080p
0−1
6−7
4K / 2160p
0−1
2−3
low / 720p
8−9
24−27
medium / 1080p
4−5
10−12
The average gaming FPS of GeForce GTX 850M in Metro Exodus is 200% more, than GeForce GT 640.
low / 768p
80−85
100−110
ultra / 1080p
70−75
100−110
medium / 1080p
−
100−110
The average gaming FPS of GeForce GTX 850M in Minecraft is 36% more, than GeForce GT 640.
high / 1080p
−
21−24
ultra / 1080p
12−14
16−18
low / 720p
27−30
50−55
medium / 1080p
14−16
21−24
The average gaming FPS of GeForce GTX 850M in PLAYERUNKNOWN'S BATTLEGROUNDS is 66% more, than GeForce GT 640.
high / 1080p
6−7
12−14
ultra / 1080p
4−5
9−10
QHD / 1440p
0−1
0−1
low / 720p
7−8
24−27
medium / 1080p
−
14−16
The average gaming FPS of GeForce GTX 850M in Red Dead Redemption 2 is 166% more, than GeForce GT 640.
low / 768p
14−16
45−50
medium / 768p
10−11
30−33
high / 1080p
5−6
16−18
ultra / 1080p
4−5
10−11
4K / 2160p
0−1
7−8
The average gaming FPS of GeForce GTX 850M in The Witcher 3: Wild Hunt is 225% more, than GeForce GT 640.
low / 768p
70−75
95−100
medium / 768p
35−40
55−60
ultra / 1080p
16−18
30−35
high / 768p
30−35
50−55
The average gaming FPS of GeForce GTX 850M in World of Tanks is 53% more, than GeForce GT 640.
Full Specs
GeForce GT 640
GeForce GTX 850M
Architecture
Kepler
Maxwell
Code name
GK107
N15P-GT
Type
Desktop
Laptop
Release date
5 June 2012
12 March 2014
Pipelines
384
640
Core clock speed
902 MHz
Transistor count
1,270 million
1,870 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
28.86
36.08
Floating-point performance
692.7 gflops
1,155 gflops
Length
145 mm
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
Memory bandwidth
28.51 GB/s
80.0 GB/s
Shared memory
-
DirectX
12 (11_0)
12 (11_0)
Shader Model
5.1
5.1
OpenGL
4.6
4.5
OpenCL
1.2
1.1
Vulkan
1.1.126
1.1.126
CUDA
3.0
+
CUDA cores
640
Bus support
PCI Express 2.0, PCI Express 3.0
SLI options
+
HDMI
+
Bitcoin / BTC (SHA256)
24 Mh/s
153 Mh/s
Laptop size
medium sized
Standard memory configuration
DDR3 or GDDR5
eDP 1.2 signal support
Up to 3840x2160
LVDS signal support
Up to 1920x1200
DisplayPort Multimode (DP++) support
Up to 3840x2160
HDCP content protection
+
7.1 channel HD audio on HDMI
+
TrueHD and DTS-HD audio bitstreaming
+
H.264, VC1, MPEG2 1080p video decoder
+
Optimus
+
Ethereum / ETH (DaggerHashimoto)
1.8 Mh/s
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