GeForce GTX 660 vs Radeon RX 640

When choosing between GeForce GTX 660 and Radeon RX 640, 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 GTX 660 and Radeon RX 640.

GeForce GTX 660 Check Price

Radeon RX 640 Check Price

Radeon RX 640 is a Laptop Graphics Card

Note: Radeon RX 640 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 Radeon RX 640 here:

Radeon RX 640 Laptops

Main Specs

	GeForce GTX 660	Radeon RX 640
Power consumption (TDP)	140 Watt	50 Watt
Interface	PCIe 3.0 x16	PCIe 3.0 x8
Supplementary power connectors	One 6-pin	None
Memory type	GDDR5	GDDR5
Maximum RAM amount	2 GB	4 GB
Display Connectors	2x DVI, 1x HDMI, 1x DisplayPort	1x DVI, 1x HDMI, 1x DisplayPort
	Check Price	Check Price

GeForce GTX 660 has 180% more power consumption, than Radeon RX 640.
GeForce GTX 660 is connected by PCIe 3.0 x16, and Radeon RX 640 uses PCIe 3.0 x8 interface.
Radeon RX 640 has 2 GB more memory, than GeForce GTX 660.
GeForce GTX 660 is used in Desktops, and Radeon RX 640 - in Laptops.
GeForce GTX 660 is build with Kepler architecture, and Radeon RX 640 - with Polaris.
Core clock speed of Radeon RX 640 is 238 MHz higher, than GeForce GTX 660.
GeForce GTX 660 is manufactured by 28 nm process technology, and Radeon RX 640 - by 14 nm process technology.
Memory clock speed of Radeon RX 640 is 5994 MHz higher, than GeForce GTX 660.

Game benchmarks


high / 1080p	20−22	5−6
ultra / 1080p	12−14	3−4
QHD / 1440p	6−7	2−3
4K / 2160p	5−6	−
low / 720p	40−45	16−18
medium / 1080p	24−27	7−8
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 200% more, than Radeon RX 640.
high / 1080p	30−35	10−12
ultra / 1080p	27−30	8−9
QHD / 1440p	10−12	0−1
4K / 2160p	8−9	−
low / 720p	65−70	24−27
medium / 1080p	35−40	10−12
The average gaming FPS of GeForce GTX 660 in Battlefield 5 is 192% more, than Radeon RX 640.
low / 768p	50−55	45−50
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 Radeon RX 640.
low / 768p	230−240	130−140
medium / 768p	200−210	100−110
ultra / 1080p	120−130	50−55
QHD / 1440p	90−95	27−30
4K / 2160p	50−55	12−14
high / 768p	160−170	80−85
The average gaming FPS of GeForce GTX 660 in Counter-Strike: Global Offensive is 110% more, than Radeon RX 640.
low / 768p	60−65	50−55
ultra / 1080p	50−55	18−20
medium / 1080p	55−60	45−50
The average gaming FPS of GeForce GTX 660 in Cyberpunk 2077 is 46% more, than Radeon RX 640.
low / 768p	120−130	80−85
medium / 768p	100−110	55−60
ultra / 1080p	80−85	30−35
The average gaming FPS of GeForce GTX 660 in Dota 2 is 82% more, than Radeon RX 640.
high / 1080p	24−27	7−8
ultra / 1080p	21−24	5−6
QHD / 1440p	18−20	−
4K / 2160p	8−9	5−6
low / 720p	50−55	18−20
medium / 1080p	27−30	8−9
The average gaming FPS of GeForce GTX 660 in Far Cry 5 is 200% more, than Radeon RX 640.
high / 1080p	30−35	7−8
ultra / 1080p	24−27	0−1
QHD / 1440p	16−18	0−1
low / 720p	120−130	60−65
medium / 1080p	70−75	18−20
The average gaming FPS of GeForce GTX 660 in Fortnite is 162% more, than Radeon RX 640.
high / 1080p	30−35	10−11
ultra / 1080p	24−27	−
QHD / 1440p	14−16	−
4K / 2160p	12−14	8−9
low / 720p	65−70	24−27
medium / 1080p	35−40	12−14
The average gaming FPS of GeForce GTX 660 in Forza Horizon 4 is 164% more, than Radeon RX 640.
low / 768p	100−110	50−55
medium / 768p	90−95	−
high / 1080p	40−45	10−12
ultra / 1080p	16−18	5−6
QHD / 1440p	7−8	−
medium / 720p	−	45−50
The average gaming FPS of GeForce GTX 660 in Grand Theft Auto V is 134% more, than Radeon RX 640.
high / 1080p	12−14	3−4
ultra / 1080p	10−11	1−2
QHD / 1440p	10−11	−
4K / 2160p	3−4	−
low / 720p	40−45	10−11
medium / 1080p	18−20	5−6
The average gaming FPS of GeForce GTX 660 in Metro Exodus is 320% more, than Radeon RX 640.
low / 768p	120−130	90−95
ultra / 1080p	−	80−85
medium / 1080p	110−120	−
The average gaming FPS of GeForce GTX 660 in Minecraft is 35% more, than Radeon RX 640.
high / 1080p	−	6−7
ultra / 1080p	14−16	2−3
4K / 2160p	−	0−1
low / 720p	70−75	27−30
medium / 1080p	18−20	10−11
The average gaming FPS of GeForce GTX 660 in PLAYERUNKNOWN'S BATTLEGROUNDS is 169% more, than Radeon RX 640.
high / 1080p	14−16	−
ultra / 1080p	10−11	−
QHD / 1440p	1−2	−
4K / 2160p	1−2	−
low / 720p	35−40	10−12
medium / 1080p	21−24	9−10
The average gaming FPS of GeForce GTX 660 in Red Dead Redemption 2 is 200% more, than Radeon RX 640.
low / 768p	70−75	21−24
medium / 768p	45−50	14−16
high / 1080p	24−27	6−7
ultra / 1080p	14−16	4−5
4K / 2160p	8−9	3−4
The average gaming FPS of GeForce GTX 660 in The Witcher 3: Wild Hunt is 230% more, than Radeon RX 640.
low / 768p	90−95	75−80
medium / 768p	60−65	40−45
ultra / 1080p	40−45	18−20
high / 768p	55−60	35−40
The average gaming FPS of GeForce GTX 660 in World of Tanks is 43% more, than Radeon RX 640.

Full Specs

	GeForce GTX 660	Radeon RX 640
Architecture	Kepler	Polaris
Code name	GK106	Polaris 12
Type	Desktop	Laptop
Release date	6 September 2012	12 August 2019
Pipelines	960	640
Core clock speed	980 MHz	1218 MHz
Boost Clock	1033 MHz	1218 MHz
Transistor count	2,540 million	2,200 million
Manufacturing process technology	28 nm	14 nm
Texture fill rate	78.4 billion/sec	38.98
Floating-point performance	1,981 gflops
Length	9.5" (24.1 cm)
Memory bus width	192-bit GDDR5	64 Bit
Memory clock speed	6.0 GB/s	6000 MHz
Memory bandwidth	144.2 GB/s	112.0 GB/s
Shared memory		-
DirectX	12 (11_0)	12 (12_0)
Shader Model	5.1	6.4
OpenGL	4.3	4.6
OpenCL	1.2	2.0
Vulkan	1.1.126	1.2.131
CUDA	+
FreeSync		+
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
Laptop size		large
	Check Price	Check Price

GeForce GTX 660 vs Radeon RX 640

Radeon RX 640 is a Laptop Graphics Card

Main Specs

Game benchmarks

Full Specs

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