GeForce GT 640 vs GTX 660M

Place in the ranking	707	770
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.20
Power efficiency	5.16	3.22
Architecture	Kepler (2012−2018)	Kepler (2012−2018)
GPU code name	GK107	GK107
Market segment	Laptop	Desktop
Release date	22 March 2012 (12 years ago)	5 June 2012 (12 years ago)
Launch price (MSRP)	no data	$99

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. 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	835 MHz	902 MHz
Boost clock speed	950 MHz	no data
Number of transistors	1,270 million	1,270 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	50 Watt	65 Watt
Texture fill rate	30.40	28.86
Floating-point processing power	0.7296 TFLOPS	0.6927 TFLOPS
ROPs	16	16
TMUs	32	32

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Laptop size	large	no data
Bus support	PCI Express 2.0, PCI Express 3.0	no data
Interface	MXM-B (3.0)	PCIe 3.0 x16
Length	no data	145 mm
Width	no data	1-slot
Supplementary power connectors	no data	None
SLI options	+	-

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	GDDR5	DDR3
Maximum RAM amount	1 GB	2 GB
Memory bus width	128bit	128 Bit
Memory clock speed	2000 MHz	891 MHz
Memory bandwidth	64.0 GB/s	28.51 GB/s
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	No outputs	1x DVI, 1x HDMI, 1x DisplayPort
HDMI	+	+
HDCP	+	-
Maximum VGA resolution	Up to 2048x1536	no data

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

Optimus

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	12 API	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.5	4.6
OpenCL	1.1	1.2
Vulkan	1.1.126	1.1.126
CUDA	+	3.0

Synthetic benchmark performance

Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

GTX 660M 3.76
+23.3%

GT 640 3.05

Passmark

This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

GTX 660M 1449
+23.3%

GT 640 1175

3DMark Fire Strike Graphics

Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.

GTX 660M 1751
+12.2%

GT 640 1560

GeekBench 5 OpenCL

Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.

GTX 660M 4031
+8.1%

GT 640 3729

GeekBench 5 Vulkan

GTX 660M 3524

GT 640 3683
+4.5%

GeekBench 5 CUDA

GTX 660M 2901
+1.7%

GT 640 2853

Octane Render OctaneBench

This is a special benchmark measuring graphics card performance in OctaneRender, which is a realistic GPU rendering engine by OTOY Inc., available either as a standalone program, or as a plugin for 3DS Max, Cinema 4D and many other apps. It renders four different static scenes, then compares render times with a reference GPU which is currently GeForce GTX 980. This benchmark has nothing to do with gaming and is aimed at professional 3D graphics artists.

GTX 660M 13
+30%

GT 640 10

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:

900p	32 +33.3%	24−27 −33.3%
Full HD	35 +29.6%	27−30 −29.6%
1200p	38 +26.7%	30−35 −26.7%

Cost per frame, $

1080p

no data

3.67

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

7−8
+40%

5−6

−40%

Full HD
Medium Preset

Assassin's Creed Odyssey	10−12 +37.5%	8−9 −37.5%
Assassin's Creed Valhalla	3−4 +50%	2−3 −50%
Battlefield 5	8−9 +33.3%	6−7 −33.3%
Call of Duty: Modern Warfare	8−9 +33.3%	6−7 −33.3%
Cyberpunk 2077	7−8 +40%	5−6 −40%
Far Cry 5	8−9 +33.3%	6−7 −33.3%
Far Cry New Dawn	10−11 +25%	8−9 −25%
Forza Horizon 4	21−24 +37.5%	16−18 −37.5%
Hitman 3	9−10 +28.6%	7−8 −28.6%
Horizon Zero Dawn	24−27 +23.8%	21−24 −23.8%
Metro Exodus	7−8 +40%	5−6 −40%
Red Dead Redemption 2	9−10 +28.6%	7−8 −28.6%
Shadow of the Tomb Raider	14−16 +40%	10−11 −40%
Watch Dogs: Legion	40−45 +40%	30−33 −40%

Full HD
High Preset

Assassin's Creed Odyssey	10−12 +37.5%	8−9 −37.5%
Assassin's Creed Valhalla	3−4 +50%	2−3 −50%
Battlefield 5	8−9 +33.3%	6−7 −33.3%
Call of Duty: Modern Warfare	8−9 +33.3%	6−7 −33.3%
Cyberpunk 2077	7−8 +40%	5−6 −40%
Far Cry 5	8−9 +33.3%	6−7 −33.3%
Far Cry New Dawn	10−11 +25%	8−9 −25%
Forza Horizon 4	21−24 +37.5%	16−18 −37.5%
Hitman 3	9−10 +28.6%	7−8 −28.6%
Horizon Zero Dawn	24−27 +23.8%	21−24 −23.8%
Metro Exodus	7−8 +40%	5−6 −40%
Red Dead Redemption 2	9−10 +28.6%	7−8 −28.6%
Shadow of the Tomb Raider	14−16 +40%	10−11 −40%
The Witcher 3: Wild Hunt	14−16 +25%	12−14 −25%
Watch Dogs: Legion	40−45 +40%	30−33 −40%

Full HD
Ultra Preset

Assassin's Creed Odyssey	10−12 +37.5%	8−9 −37.5%
Assassin's Creed Valhalla	3−4 +50%	2−3 −50%
Call of Duty: Modern Warfare	8−9 +33.3%	6−7 −33.3%
Cyberpunk 2077	7−8 +40%	5−6 −40%
Far Cry 5	8−9 +33.3%	6−7 −33.3%
Forza Horizon 4	21−24 +37.5%	16−18 −37.5%
Hitman 3	9−10 +28.6%	7−8 −28.6%
Horizon Zero Dawn	24−27 +23.8%	21−24 −23.8%
Shadow of the Tomb Raider	14−16 +40%	10−11 −40%
The Witcher 3: Wild Hunt	14−16 +25%	12−14 −25%
Watch Dogs: Legion	40−45 +40%	30−33 −40%

Full HD
Epic Preset

Red Dead Redemption 2

9−10
+28.6%

7−8

−28.6%

1440p
High Preset

Battlefield 5	7−8 +40%	5−6 −40%
Far Cry New Dawn	6−7 +50%	4−5 −50%

1440p
Ultra Preset

Assassin's Creed Odyssey	3−4 +50%	2−3 −50%
Call of Duty: Modern Warfare	3−4 +50%	2−3 −50%
Cyberpunk 2077	2−3 +100%	1−2 −100%
Far Cry 5	4−5 +33.3%	3−4 −33.3%
Forza Horizon 4	3−4 +50%	2−3 −50%
Hitman 3	8−9 +33.3%	6−7 −33.3%
Horizon Zero Dawn	9−10 +28.6%	7−8 −28.6%
The Witcher 3: Wild Hunt	3−4 +50%	2−3 −50%
Watch Dogs: Legion	21−24 +27.8%	18−20 −27.8%

1440p
Epic Preset

Red Dead Redemption 2

7−8
+40%

5−6

−40%

4K
High Preset

Battlefield 5	2−3 +100%	1−2 −100%
Far Cry New Dawn	2−3 +100%	1−2 −100%
Metro Exodus	0−1	0−1

4K
Ultra Preset

Assassin's Creed Odyssey	3−4 +50%	2−3 −50%
Assassin's Creed Valhalla	2−3 +100%	1−2 −100%
Call of Duty: Modern Warfare	1−2	0−1
Cyberpunk 2077	0−1	0−1
Far Cry 5	2−3 +100%	1−2 −100%
Forza Horizon 4	2−3 +100%	1−2 −100%
Watch Dogs: Legion	1−2	0−1