GeForce 830M vs GeForce GT 640M
In this comparison between GeForce 830M and GeForce GT 640M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce 830M will be the best choice, for others GeForce GT 640M will be their preference. Study the comparison tables below and make your choice.
GeForce 830M and GeForce GT 640M are Laptop Graphics Cards
Note: GeForce 830M and GeForce GT 640M 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 830M or GeForce GT 640M here:
Main Specs
GeForce 830M
GeForce GT 640M
Power consumption (TDP)
33 Watt
32 Watt
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Memory type
DDR3
DDR3\GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
No outputs
No outputs
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GeForce 830M has 3% more power consumption, than GeForce GT 640M.
GeForce 830M is connected by PCIe 3.0 x8, and GeForce GT 640M uses PCIe 3.0 x16 interface.
GeForce 830M and GeForce GT 640M have maximum RAM of 2 GB.
Both cards are used in Laptops.
GeForce 830M is build with Maxwell architecture, and GeForce GT 640M - with Kepler.
GeForce 830M and GeForce GT 640M are manufactured by 28 nm process technology.
Memory clock speed of GeForce 830M and GeForce GT 640M is 1800 MHz.
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
0−1
ultra / 1080p
0−1
0−1
QHD / 1440p
0−1
0−1
low / 720p
12−14
10−12
medium / 1080p
3−4
2−3
The average gaming FPS of GeForce 830M in Assassin's Creed Odyssey is 33% more, than GeForce GT 640M.
ultra / 1080p
5−6
3−4
QHD / 1440p
0−1
0−1
low / 720p
14−16
12−14
medium / 1080p
6−7
4−5
The average gaming FPS of GeForce 830M in Battlefield 5 is 28% more, than GeForce GT 640M.
low / 768p
50−55
50−55
high / 1080p
40−45
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 640M in Call of Duty: Warzone is 6% more, than GeForce 830M.
low / 768p
120−130
110−120
medium / 768p
90−95
85−90
ultra / 1080p
35−40
35−40
QHD / 1440p
21−24
−
4K / 2160p
16−18
10−11
high / 768p
65−70
55−60
The average gaming FPS of GeForce 830M in Counter-Strike: Global Offensive is 9% more, than GeForce GT 640M.
low / 768p
65−70
70−75
ultra / 1080p
18−20
12−14
medium / 1080p
45−50
45−50
GeForce 830M and GeForce GT 640M have the same average FPS in Cyberpunk 2077.
low / 768p
75−80
70−75
medium / 768p
45−50
40−45
ultra / 1080p
20−22
18−20
The average gaming FPS of GeForce 830M in Dota 2 is 9% more, than GeForce GT 640M.
high / 1080p
2−3
2−3
ultra / 1080p
2−3
2−3
4K / 2160p
2−3
0−1
low / 720p
10−12
9−10
medium / 1080p
3−4
3−4
GeForce 830M and GeForce GT 640M have the same average FPS in Far Cry 5.
high / 1080p
10−11
−
ultra / 1080p
5−6
5−6
QHD / 1440p
3−4
1−2
low / 720p
50−55
45−50
medium / 1080p
10−11
7−8
The average gaming FPS of GeForce 830M in Fortnite is 20% more, than GeForce GT 640M.
high / 1080p
5−6
2−3
QHD / 1440p
3−4
0−1
4K / 2160p
2−3
−
low / 720p
16−18
14−16
medium / 1080p
8−9
5−6
The average gaming FPS of GeForce 830M in Forza Horizon 4 is 42% more, than GeForce GT 640M.
low / 768p
45−50
40−45
high / 1080p
4−5
3−4
ultra / 1080p
2−3
2−3
QHD / 1440p
0−1
0−1
medium / 720p
35−40
30−35
The average gaming FPS of GeForce 830M in Grand Theft Auto V is 15% more, than GeForce GT 640M.
high / 1080p
1−2
1−2
ultra / 1080p
0−1
0−1
4K / 2160p
0−1
0−1
low / 720p
4−5
2−3
medium / 1080p
3−4
2−3
The average gaming FPS of GeForce 830M in Metro Exodus is 50% more, than GeForce GT 640M.
low / 768p
90−95
85−90
high / 1080p
80−85
55−60
ultra / 1080p
70−75
−
medium / 1080p
85−90
−
The average gaming FPS of GeForce 830M in Minecraft is 20% more, than GeForce GT 640M.
high / 1080p
−
14−16
ultra / 1080p
12−14
12−14
low / 720p
27−30
24−27
medium / 1080p
14−16
14−16
The average gaming FPS of GeForce 830M in PLAYERUNKNOWN'S BATTLEGROUNDS is 5% more, than GeForce GT 640M.
ultra / 1080p
−
3−4
QHD / 1440p
−
0−1
low / 720p
6−7
3−4
The average gaming FPS of GeForce 830M in Red Dead Redemption 2 is 100% more, than GeForce GT 640M.
low / 768p
9−10
7−8
medium / 768p
8−9
6−7
high / 1080p
4−5
3−4
ultra / 1080p
3−4
−
4K / 2160p
1−2
0−1
The average gaming FPS of GeForce 830M in The Witcher 3: Wild Hunt is 40% more, than GeForce GT 640M.
low / 768p
70−75
70−75
medium / 768p
35−40
35−40
ultra / 1080p
14−16
12−14
high / 768p
30−35
27−30
The average gaming FPS of GeForce 830M in World of Tanks is 5% more, than GeForce GT 640M.
Full Specs
GeForce 830M
GeForce GT 640M
Architecture
Maxwell
Kepler
Code name
N15?
N13P-GS
Type
Laptop
Laptop
Release date
12 March 2014
22 March 2012
Pipelines
256
384
Core clock speed
1029 MHz
Boost Clock
1150 MHz
645 MHz
Transistor count
1,270 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
18.40
Floating-point performance
588.8 gflops
480.0 gflops
Memory bus width
64 Bit
128bit
Memory clock speed
1800 MHz
1800 - 4000 MHz
Memory bandwidth
14.4 GB/s
Shared memory
-
-
DirectX
12 (11_0)
12 API
Shader Model
5.1
5.1
OpenGL
4.5
4.5
OpenCL
1.2
1.1
Vulkan
1.1.126
1.1.126
CUDA
+
+
CUDA cores
384
Bus support
PCI Express 2.0, PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
67 Mh/s
18 Mh/s
Laptop size
medium sized
Optimus
+
+
GPU Boost
2.0
GameWorks
+
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