Radeon 660M vs GeForce GT 640 OEM

Place in performance ranking	892	424
Place by popularity	not in top-100	not in top-100
Architecture	Kepler (2012−2018)	RDNA 2 (2020−2022)
GPU code name	GK107	RDNA 2 Rembrandt
Market segment	Desktop	Laptop
Release date	24 April 2012 (12 years ago)	4 January 2022 (2 years ago)
Current price	$99	no data

Detailed specifications

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	384	384
Core clock speed	797 MHz	no data
Boost clock speed	no data	1900 MHz
Number of transistors	1,270 million	13,100 million
Manufacturing process technology	28 nm	6 nm
Power consumption (TDP)	50 Watt	45 Watt
Texture fill rate	25.50	45.60
Floating-point performance	612.1 gflops	no data

Form factor & compatibility

Information on GeForce GT 640 OEM and Radeon 660M compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.

Interface	PCIe 3.0 x16	PCIe 4.0 x8
Length	145 mm	no data
Width	1-slot	no data
Supplementary power connectors	None	None

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	DDR3	System Shared
Maximum RAM amount	2 GB	System Shared
Memory bus width	128 Bit	System Shared
Memory clock speed	1782 MHz	System Shared
Memory bandwidth	28.51 GB/s	no data
Shared memory	no data	-

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors	1x DVI, 1x HDMI, 1x DisplayPort	No outputs
HDMI	+	no data

API compatibility

List of supported graphics and general-purpose computing APIs, including their specific versions.

DirectX	12 (11_0)	12 (12_1)
Shader Model	5.1	6.5
OpenGL	4.6	4.6
OpenCL	1.2	2.0
Vulkan	1.1.126	1.2
CUDA	3.0	no data

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Average FPS across all PC games

Here are the average frames per second in a large set of popular games across different resolutions:

Full HD

4−5

−525%

25
+525%

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

4−5
−500%

+500%

Full HD
Medium Preset

Assassin's Creed Odyssey	3−4 −567%	20−22 +567%
Assassin's Creed Valhalla	4−5 −550%	26 +550%
Battlefield 5	5−6 −500%	30−33 +500%
Call of Duty: Modern Warfare	3−4 −567%	20−22 +567%
Cyberpunk 2077	3−4 −567%	20 +567%
Far Cry 5	3−4 −667%	21−24 +667%
Far Cry New Dawn	4−5 −575%	27−30 +575%
Forza Horizon 4	8−9 −500%	45−50 +500%
Hitman 3	3−4 −600%	21 +600%
Horizon Zero Dawn	7−8 −543%	45 +543%
Metro Exodus	5−6 −500%	30−33 +500%
Red Dead Redemption 2	4−5 −575%	27−30 +575%
Shadow of the Tomb Raider	6−7 −550%	39 +550%
Watch Dogs: Legion	4−5 −550%	26 +550%

Full HD
High Preset

Assassin's Creed Odyssey	3−4 −567%	20−22 +567%
Assassin's Creed Valhalla	3−4 −533%	19 +533%
Battlefield 5	5−6 −500%	30−33 +500%
Call of Duty: Modern Warfare	3−4 −567%	20−22 +567%
Cyberpunk 2077	2−3 −600%	14 +600%
Far Cry 5	3−4 −667%	21−24 +667%
Far Cry New Dawn	4−5 −575%	27−30 +575%
Forza Horizon 4	8−9 −500%	45−50 +500%
Hitman 3	1−2 −1000%	11 +1000%
Horizon Zero Dawn	7−8 −486%	40−45 +486%
Metro Exodus	2−3 −650%	15 +650%
Red Dead Redemption 2	4−5 −575%	27−30 +575%
Shadow of the Tomb Raider	5−6 −540%	32 +540%
The Witcher 3: Wild Hunt	4−5 −525%	25 +525%
Watch Dogs: Legion	6−7 −483%	35−40 +483%

Full HD
Ultra Preset

Assassin's Creed Odyssey	3−4 −567%	20−22 +567%
Assassin's Creed Valhalla	2−3 −600%	14−16 +600%
Call of Duty: Modern Warfare	3−4 −567%	20−22 +567%
Cyberpunk 2077	2−3 −650%	14−16 +650%
Far Cry 5	3−4 −667%	21−24 +667%
Forza Horizon 4	8−9 −500%	45−50 +500%
Horizon Zero Dawn	3−4 −633%	22 +633%
Shadow of the Tomb Raider	4−5 −550%	26 +550%
The Witcher 3: Wild Hunt	2−3 −650%	15 +650%
Watch Dogs: Legion	6−7 −483%	35−40 +483%

Full HD
Epic Preset

Red Dead Redemption 2

4−5
−575%

27−30

+575%

1440p
High Preset

Battlefield 5	3−4 −533%	18−20 +533%
Far Cry New Dawn	2−3 −700%	16−18 +700%

1440p
Ultra Preset

Assassin's Creed Odyssey	1−2 −800%	9−10 +800%
Assassin's Creed Valhalla	0−1	5−6
Call of Duty: Modern Warfare	2−3 −500%	12−14 +500%
Cyberpunk 2077	0−1	5−6
Far Cry 5	2−3 −650%	14−16 +650%
Forza Horizon 4	3−4 −500%	18−20 +500%
Hitman 3	2−3 −550%	12−14 +550%
Horizon Zero Dawn	3−4 −567%	20−22 +567%
Metro Exodus	2−3 −600%	14−16 +600%
Shadow of the Tomb Raider	2−3 −550%	12−14 +550%
The Witcher 3: Wild Hunt	1−2 −800%	9−10 +800%
Watch Dogs: Legion	0−1	5−6

1440p
Epic Preset

Red Dead Redemption 2

2−3
−700%

16−18

+700%

4K
High Preset

Battlefield 5	1−2 −800%	9−10 +800%
Far Cry New Dawn	1−2 −600%	7−8 +600%
Hitman 3	1−2 −500%	6−7 +500%
Horizon Zero Dawn	1−2 −900%	10−11 +900%
Shadow of the Tomb Raider	0−1	5−6
The Witcher 3: Wild Hunt	1−2 −600%	7−8 +600%

4K
Ultra Preset

Assassin's Creed Odyssey	1−2 −500%	6−7 +500%
Assassin's Creed Valhalla	0−1	4−5
Call of Duty: Modern Warfare	0−1	4−5
Cyberpunk 2077	0−1	1−2
Far Cry 5	0−1	5−6
Forza Horizon 4	2−3 −500%	12−14 +500%
Horizon Zero Dawn	1−2 −900%	10−11 +900%
Metro Exodus	1−2 −900%	10−11 +900%
Watch Dogs: Legion	0−1	3−4