GeForce 840A vs GeForce GTX 660

When choosing between GeForce 840A and GeForce GTX 660, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce 840A and GeForce GTX 660.

GeForce 840A

GeForce GTX 660 Check Price

Main Specs

	GeForce 840A	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	2 GB	2 GB
Display Connectors	No outputs	2x DVI, 1x HDMI, 1x DisplayPort
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GeForce GTX 660 has 324% more power consumption, than GeForce 840A.
GeForce 840A is connected by PCIe 3.0 x8, and GeForce GTX 660 uses PCIe 3.0 x16 interface.
GeForce 840A and GeForce GTX 660 have maximum RAM of 2 GB.
Both cards are used in Desktops.
GeForce 840A is build with Maxwell architecture, and GeForce GTX 660 - with Kepler.
Core clock speed of GeForce 840A is 49 MHz higher, than GeForce GTX 660.
GeForce 840A and GeForce GTX 660 are manufactured by 28 nm process technology.
Memory clock speed of GeForce 840A is 1996 MHz higher, than GeForce GTX 660.

Game benchmarks


high / 1080p	3−4	20−22
ultra / 1080p	2−3	12−14
QHD / 1440p	0−1	6−7
4K / 2160p	−	5−6
low / 720p	14−16	40−45
medium / 1080p	5−6	24−27
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 316% more, than GeForce 840A.
high / 1080p	−	30−35
ultra / 1080p	7−8	27−30
QHD / 1440p	0−1	10−12
4K / 2160p	−	8−9
low / 720p	18−20	65−70
medium / 1080p	8−9	35−40
The average gaming FPS of GeForce GTX 660 in Battlefield 5 is 300% more, than GeForce 840A.
low / 768p	45−50	50−55
high / 1080p	30−35	−
QHD / 1440p	0−1	0−1
The average gaming FPS of GeForce GTX 660 in Call of Duty: Warzone is 10% more, than GeForce 840A.
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 840A.
low / 768p	80−85	60−65
ultra / 1080p	14−16	50−55
medium / 1080p	40−45	55−60
The average gaming FPS of GeForce GTX 660 in Cyberpunk 2077 is 23% more, than GeForce 840A.
low / 768p	75−80	120−130
medium / 768p	50−55	100−110
ultra / 1080p	27−30	80−85
The average gaming FPS of GeForce GTX 660 in Dota 2 is 100% more, than GeForce 840A.
high / 1080p	5−6	24−27
ultra / 1080p	−	21−24
QHD / 1440p	−	18−20
4K / 2160p	2−3	8−9
low / 720p	14−16	50−55
medium / 1080p	6−7	27−30
The average gaming FPS of GeForce GTX 660 in Far Cry 5 is 300% more, than GeForce 840A.
high / 1080p	12−14	30−35
ultra / 1080p	7−8	24−27
QHD / 1440p	−	16−18
low / 720p	50−55	120−130
medium / 1080p	14−16	70−75
The average gaming FPS of GeForce GTX 660 in Fortnite is 186% more, than GeForce 840A.
high / 1080p	7−8	30−35
ultra / 1080p	−	24−27
QHD / 1440p	0−1	14−16
4K / 2160p	−	12−14
low / 720p	20−22	65−70
medium / 1080p	9−10	35−40
The average gaming FPS of GeForce GTX 660 in Forza Horizon 4 is 275% more, than GeForce 840A.
low / 768p	45−50	100−110
medium / 768p	−	90−95
high / 1080p	8−9	40−45
ultra / 1080p	5−6	16−18
QHD / 1440p	0−1	7−8
medium / 720p	40−45	−
The average gaming FPS of GeForce GTX 660 in Grand Theft Auto V is 170% more, than GeForce 840A.
high / 1080p	3−4	12−14
ultra / 1080p	1−2	10−11
QHD / 1440p	−	10−11
4K / 2160p	0−1	3−4
low / 720p	8−9	40−45
medium / 1080p	4−5	18−20
The average gaming FPS of GeForce GTX 660 in Metro Exodus is 425% more, than GeForce 840A.
low / 768p	85−90	120−130
high / 1080p	85−90	−
ultra / 1080p	80−85	−
medium / 1080p	85−90	110−120
The average gaming FPS of GeForce GTX 660 in Minecraft is 37% more, than GeForce 840A.
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 840A.
high / 1080p	−	14−16
ultra / 1080p	7−8	10−11
QHD / 1440p	0−1	1−2
4K / 2160p	−	1−2
low / 720p	8−9	35−40
medium / 1080p	−	21−24
The average gaming FPS of GeForce GTX 660 in Red Dead Redemption 2 is 200% more, than GeForce 840A.
low / 768p	16−18	70−75
medium / 768p	12−14	45−50
high / 1080p	6−7	24−27
ultra / 1080p	5−6	14−16
4K / 2160p	−	8−9
The average gaming FPS of GeForce GTX 660 in The Witcher 3: Wild Hunt is 300% more, than GeForce 840A.
low / 768p	70−75	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 61% more, than GeForce 840A.

Full Specs

	GeForce 840A	GeForce GTX 660
Architecture	Maxwell	Kepler
Code name	GM108	GK106
Type	Desktop	Desktop
Release date	17 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	2002 MHz	6.0 GB/s
Memory bandwidth	16.02 GB/s	144.2 GB/s
DirectX	12 (11_0)	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.6	4.3
OpenCL	1.2	1.2
Vulkan	1.1.126	1.1.126
CUDA	5.0	+
CUDA cores		960
Bus support		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)		66 Mh/s
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GeForce 840A vs GeForce GTX 660

Main Specs

Game benchmarks

Full Specs

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