GeForce 840M vs GeForce GT 640

When comparing GeForce 840M 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 840M 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 840M Check Price

GeForce GT 640 Check Price

GeForce 840M is a Laptop Graphics Card

Note: GeForce 840M 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 840M here:

GeForce 840M Laptops

Main Specs

	GeForce 840M	GeForce GT 640
Power consumption (TDP)	33 Watt	65 Watt
Interface	PCIe 3.0 x8	PCIe 3.0 x16
Supplementary power connectors		None
Memory type	DDR3	DDR3
Maximum RAM amount	4 GB	2 GB
Display Connectors	No outputs	1x DVI, 1x HDMI, 1x DisplayPort
	Check Price	Check Price

GeForce GT 640 has 96% more power consumption, than GeForce 840M.
GeForce 840M is connected by PCIe 3.0 x8, and GeForce GT 640 uses PCIe 3.0 x16 interface.
GeForce 840M has 2 GB more memory, than GeForce GT 640.
GeForce 840M is used in Laptops, and GeForce GT 640 - in Desktops.
GeForce 840M is build with Maxwell architecture, and GeForce GT 640 - with Kepler.
Core clock speed of GeForce 840M is 127 MHz higher, than GeForce GT 640.
GeForce 840M and GeForce GT 640 are manufactured by 28 nm process technology.
Memory clock speed of GeForce 840M is 218 MHz higher, than GeForce GT 640.

Game benchmarks


high / 1080p	1−2	2−3
ultra / 1080p	0−1	1−2
QHD / 1440p	0−1	0−1
low / 720p	12−14	14−16
medium / 1080p	3−4	5−6
The average gaming FPS of GeForce GT 640 in Assassin's Creed Odyssey is 16% more, than GeForce 840M.
high / 1080p	−	7−8
ultra / 1080p	4−5	5−6
QHD / 1440p	0−1	0−1
low / 720p	16−18	20−22
medium / 1080p	5−6	7−8
The average gaming FPS of GeForce GT 640 in Battlefield 5 is 22% more, than GeForce 840M.
low / 768p	45−50	50−55
high / 1080p	40−45	35−40
QHD / 1440p	0−1	0−1
GeForce 840M and GeForce GT 640 have the same average FPS in Call of Duty: Warzone.
low / 768p	120−130	110−120
medium / 768p	90−95	90−95
ultra / 1080p	40−45	45−50
QHD / 1440p	24−27	24−27
4K / 2160p	18−20	18−20
high / 768p	65−70	65−70
The average gaming FPS of GeForce 840M in Counter-Strike: Global Offensive is 1% more, than GeForce GT 640.
low / 768p	85−90	70−75
ultra / 1080p	16−18	21−24
medium / 1080p	40−45	45−50
The average gaming FPS of GeForce 840M in Cyberpunk 2077 is 4% more, than GeForce GT 640.
low / 768p	75−80	70−75
medium / 768p	50−55	50−55
ultra / 1080p	24−27	27−30
GeForce 840M and GeForce GT 640 have the same average FPS in Dota 2.
high / 1080p	2−3	3−4
ultra / 1080p	2−3	3−4
4K / 2160p	0−1	2−3
low / 720p	12−14	14−16
medium / 1080p	3−4	4−5
The average gaming FPS of GeForce GT 640 in Far Cry 5 is 20% more, than GeForce 840M.
high / 1080p	10−11	10−12
ultra / 1080p	5−6	5−6
QHD / 1440p	2−3	2−3
low / 720p	50−55	50−55
medium / 1080p	10−12	16−18
The average gaming FPS of GeForce GT 640 in Fortnite is 6% more, than GeForce 840M.
high / 1080p	4−5	6−7
QHD / 1440p	0−1	4−5
4K / 2160p	−	2−3
low / 720p	16−18	21−24
medium / 1080p	7−8	9−10
The average gaming FPS of GeForce GT 640 in Forza Horizon 4 is 33% more, than GeForce 840M.
low / 768p	45−50	45−50
high / 1080p	5−6	7−8
ultra / 1080p	2−3	3−4
QHD / 1440p	0−1	0−1
medium / 720p	35−40	40−45
The average gaming FPS of GeForce GT 640 in Grand Theft Auto V is 8% more, than GeForce 840M.
high / 1080p	1−2	2−3
ultra / 1080p	0−1	0−1
4K / 2160p	0−1	0−1
low / 720p	5−6	8−9
medium / 1080p	3−4	4−5
The average gaming FPS of GeForce GT 640 in Metro Exodus is 66% more, than GeForce 840M.
low / 768p	90−95	80−85
high / 1080p	85−90	−
ultra / 1080p	70−75	70−75
medium / 1080p	90−95	−
The average gaming FPS of GeForce 840M in Minecraft is 6% more, than GeForce GT 640.
ultra / 1080p	12−14	12−14
low / 720p	27−30	27−30
medium / 1080p	14−16	14−16
GeForce 840M and GeForce GT 640 have the same average FPS in PLAYERUNKNOWN'S BATTLEGROUNDS.
high / 1080p	−	6−7
ultra / 1080p	4−5	4−5
QHD / 1440p	0−1	0−1
low / 720p	6−7	7−8
The average gaming FPS of GeForce GT 640 in Red Dead Redemption 2 is 20% more, than GeForce 840M.
low / 768p	12−14	14−16
medium / 768p	9−10	10−11
high / 1080p	4−5	5−6
ultra / 1080p	3−4	4−5
4K / 2160p	0−1	0−1
The average gaming FPS of GeForce GT 640 in The Witcher 3: Wild Hunt is 14% more, than GeForce 840M.
low / 768p	75−80	70−75
medium / 768p	35−40	35−40
ultra / 1080p	16−18	16−18
high / 768p	30−35	30−35
The average gaming FPS of GeForce 840M in World of Tanks is 5% more, than GeForce GT 640.

Full Specs

	GeForce 840M	GeForce GT 640
Architecture	Maxwell	Kepler
Code name	N15S-GT	GK107
Type	Laptop	Desktop
Release date	12 March 2014	5 June 2012
Pipelines	384	384
Core clock speed	1029 MHz	902 MHz
Boost Clock	1124 MHz
Transistor count		1,270 million
Manufacturing process technology	28 nm	28 nm
Texture fill rate	17.98	28.86
Floating-point performance	863.2 gflops	692.7 gflops
Length		145 mm
Memory bus width	64 Bit	128 Bit
Memory clock speed	2000 MHz	1782 MHz
Memory bandwidth	16.02 GB/s	28.51 GB/s
Shared memory	-
DirectX	12 (11_0)	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.5	4.6
OpenCL	1.2	1.2
Vulkan	1.1.126	1.1.126
CUDA	+	3.0
Bus support	PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256)	92 Mh/s	24 Mh/s
Laptop size	medium sized
Optimus	+
GPU Boost	2.0
GameWorks	+
	Check Price	Check Price

GeForce 840M vs GeForce GT 640

GeForce 840M is a Laptop Graphics Card

Main Specs

Game benchmarks

Full Specs

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