GeForce 840M vs GeForce GTX 660

In this comparison between GeForce 840M and GeForce GTX 660 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 840M will be the best choice, for others GeForce GTX 660 will be their preference. Study the comparison tables below and make your choice.

GeForce 840M Check Price

GeForce GTX 660 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 GTX 660
Power consumption (TDP)	33 Watt	140 Watt
Interface	PCIe 3.0 x8	PCIe 3.0 x16
Supplementary power connectors		One 6-pin
Memory type	DDR3	GDDR5
Maximum RAM amount	4 GB	2 GB
Display Connectors	No outputs	2x DVI, 1x HDMI, 1x DisplayPort
	Check Price	Check Price

GeForce GTX 660 has 324% more power consumption, than GeForce 840M.
GeForce 840M is connected by PCIe 3.0 x8, and GeForce GTX 660 uses PCIe 3.0 x16 interface.
GeForce 840M has 2 GB more memory, than GeForce GTX 660.
GeForce 840M is used in Laptops, and GeForce GTX 660 - in Desktops.
GeForce 840M is build with Maxwell architecture, and GeForce GTX 660 - with Kepler.
Core clock speed of GeForce 840M is 49 MHz higher, than GeForce GTX 660.
GeForce 840M and GeForce GTX 660 are manufactured by 28 nm process technology.
Memory clock speed of GeForce 840M is 1994 MHz higher, than GeForce GTX 660.

Game benchmarks


high / 1080p	1−2	20−22
ultra / 1080p	0−1	12−14
QHD / 1440p	0−1	6−7
4K / 2160p	−	5−6
low / 720p	12−14	40−45
medium / 1080p	3−4	24−27
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 383% more, than GeForce 840M.
high / 1080p	−	30−35
ultra / 1080p	4−5	27−30
QHD / 1440p	0−1	10−12
4K / 2160p	−	8−9
low / 720p	16−18	65−70
medium / 1080p	5−6	35−40
The average gaming FPS of GeForce GTX 660 in Battlefield 5 is 388% more, than GeForce 840M.
low / 768p	45−50	50−55
high / 1080p	40−45	−
QHD / 1440p	0−1	0−1
The average gaming FPS of GeForce GTX 660 in Call of Duty: Warzone is 10% more, than GeForce 840M.
low / 768p	120−130	230−240
medium / 768p	90−95	200−210
ultra / 1080p	40−45	120−130
QHD / 1440p	24−27	90−95
4K / 2160p	18−20	50−55
high / 768p	65−70	160−170
The average gaming FPS of GeForce GTX 660 in Counter-Strike: Global Offensive is 133% more, than GeForce 840M.
low / 768p	85−90	60−65
ultra / 1080p	16−18	50−55
medium / 1080p	40−45	55−60
The average gaming FPS of GeForce GTX 660 in Cyberpunk 2077 is 16% more, than GeForce 840M.
low / 768p	75−80	120−130
medium / 768p	50−55	100−110
ultra / 1080p	24−27	80−85
The average gaming FPS of GeForce GTX 660 in Dota 2 is 103% more, than GeForce 840M.
high / 1080p	2−3	24−27
ultra / 1080p	2−3	21−24
QHD / 1440p	−	18−20
4K / 2160p	0−1	8−9
low / 720p	12−14	50−55
medium / 1080p	3−4	27−30
The average gaming FPS of GeForce GTX 660 in Far Cry 5 is 540% more, than GeForce 840M.
high / 1080p	10−11	30−35
ultra / 1080p	5−6	24−27
QHD / 1440p	2−3	16−18
low / 720p	50−55	120−130
medium / 1080p	10−12	70−75
The average gaming FPS of GeForce GTX 660 in Fortnite is 237% more, than GeForce 840M.
high / 1080p	4−5	30−35
ultra / 1080p	−	24−27
QHD / 1440p	0−1	14−16
4K / 2160p	−	12−14
low / 720p	16−18	65−70
medium / 1080p	7−8	35−40
The average gaming FPS of GeForce GTX 660 in Forza Horizon 4 is 400% more, than GeForce 840M.
low / 768p	45−50	100−110
medium / 768p	−	90−95
high / 1080p	5−6	40−45
ultra / 1080p	2−3	16−18
QHD / 1440p	0−1	7−8
medium / 720p	35−40	−
The average gaming FPS of GeForce GTX 660 in Grand Theft Auto V is 200% more, than GeForce 840M.
high / 1080p	1−2	12−14
ultra / 1080p	0−1	10−11
QHD / 1440p	−	10−11
4K / 2160p	0−1	3−4
low / 720p	5−6	40−45
medium / 1080p	3−4	18−20
The average gaming FPS of GeForce GTX 660 in Metro Exodus is 700% more, than GeForce 840M.
low / 768p	90−95	120−130
high / 1080p	85−90	−
ultra / 1080p	70−75	−
medium / 1080p	90−95	110−120
The average gaming FPS of GeForce GTX 660 in Minecraft is 30% more, than GeForce 840M.
ultra / 1080p	12−14	14−16
low / 720p	27−30	70−75
medium / 1080p	14−16	18−20
The average gaming FPS of GeForce GTX 660 in PLAYERUNKNOWN'S BATTLEGROUNDS is 94% more, than GeForce 840M.
high / 1080p	−	14−16
ultra / 1080p	4−5	10−11
QHD / 1440p	0−1	1−2
4K / 2160p	−	1−2
low / 720p	6−7	35−40
medium / 1080p	−	21−24
The average gaming FPS of GeForce GTX 660 in Red Dead Redemption 2 is 380% more, than GeForce 840M.
low / 768p	12−14	70−75
medium / 768p	9−10	45−50
high / 1080p	4−5	24−27
ultra / 1080p	3−4	14−16
4K / 2160p	0−1	8−9
The average gaming FPS of GeForce GTX 660 in The Witcher 3: Wild Hunt is 471% more, than GeForce 840M.
low / 768p	75−80	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 660 in World of Tanks is 53% more, than GeForce 840M.

Full Specs

	GeForce 840M	GeForce GTX 660
Architecture	Maxwell	Kepler
Code name	N15S-GT	GK106
Type	Laptop	Desktop
Release date	12 March 2014	6 September 2012
Pipelines	384	960
Core clock speed	1029 MHz	980 MHz
Boost Clock	1124 MHz	1033 MHz
Transistor count		2,540 million
Manufacturing process technology	28 nm	28 nm
Texture fill rate	17.98	78.4 billion/sec
Floating-point performance	863.2 gflops	1,981 gflops
Length		9.5" (24.1 cm)
Memory bus width	64 Bit	192-bit GDDR5
Memory clock speed	2000 MHz	6.0 GB/s
Memory bandwidth	16.02 GB/s	144.2 GB/s
Shared memory	-
DirectX	12 (11_0)	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.5	4.3
OpenCL	1.2	1.2
Vulkan	1.1.126	1.1.126
CUDA	+	+
CUDA cores		960
Bus support	PCI Express 2.0, PCI Express 3.0	PCI Express 3.0
Height		4.376" (11.1 cm)
SLI options		+
Multi monitor support		4 displays
HDMI		+
HDCP		+
Maximum VGA resolution		2048x1536
Audio input for HDMI		Internal
3D Blu-Ray		+
3D Gaming		+
3D Vision		+
Bitcoin / BTC (SHA256)	92 Mh/s	66 Mh/s
Laptop size	medium sized
Optimus	+
GPU Boost	2.0
GameWorks	+
	Check Price	Check Price

GeForce 840M vs GeForce GTX 660

GeForce 840M is a Laptop Graphics Card

Main Specs

Game benchmarks

Full Specs

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