NVIDIA started GeForce GT 640M sales 22 March 2012. This is a Kepler architecture notebook card based on 28 nm manufacturing process and primarily aimed at office use. 2 GB of DDR3\GDDR5 memory clocked at 0.9 GHz are supplied, and together with 128bit memory interface this creates a bandwidth of Up to 64.0 GB/s.

Compatibility-wise, this is a graphics card attached via PCIe 3.0 x16 interface. Power consumption is at 32 Watt.

Primary details

Some basic facts about GeForce GT 640M: architecture, market segment, release date etc.

Place in the ranking	843
Place by popularity	not in top-100
Power efficiency	5.14	of 100.00 (Radeon 890M)
Architecture	Kepler (2012−2018)
GPU code name	GK107
Market segment	Laptop
Release date	22 March 2012 (12 years ago)

Detailed specifications

GeForce GT 640M's specs such as number of shaders, GPU base clock, manufacturing process, texturing and calculation speed. These parameters indirectly speak of GeForce GT 640M's performance, but for precise assessment you have to consider its benchmark and gaming test results.

Pipelines / CUDA cores	384	of 21760 (GeForce RTX 5090)
Core clock speed	Up to 625 MHz	of 2670 MHz (Arc B580)
Boost clock speed	645 MHz	of 3599 MHz (Radeon RX 7990 XTX)
Number of transistors	1,270 million	of 208,000 million (B200 SXM 192 GB)
Manufacturing process technology	28 nm	of 3 nm (Arc Graphics 140V)
Power consumption (TDP)	32 Watt	of 2400 Watt (Data Center GPU Max Subsystem)
Texture fill rate	20.00	of 2,554 (Radeon Instinct MI300X)
Floating-point processing power	0.48 TFLOPS	of 109.7 (GeForce RTX 5090)
ROPs	16	of 192 (Radeon RX 7900 XTX)
TMUs	32	of 1280 (Data Center GPU Max NEXT)

Form factor & compatibility

This section provides details about the physical dimensions of GeForce GT 640M and its compatibility with other computer components. This information is useful when selecting a computer configuration or upgrading an existing one. For desktop graphics cards, it includes details about the interface and bus (for motherboard compatibility) and additional power connectors (for power supply compatibility).

Laptop size	medium sized
Bus support	PCI Express 2.0, PCI Express 3.0
Interface	PCIe 3.0 x16

VRAM capacity and type

Parameters of memory installed on GeForce GT 640M: its type, size, bus, clock and resulting bandwidth. Note that GPUs integrated into processors have no dedicated memory and use a shared part of system RAM instead.

Memory type	DDR3\GDDR5
Maximum RAM amount	2 GB	of 294912 (Radeon Instinct MI325X)
Memory bus width	128bit	of 8192 Bit (Radeon Instinct MI250X)
Memory clock speed	900 MHz	of 20000 (RTX 5000 Ada Generation Mobile)
Memory bandwidth	Up to 64.0 GB/s	of 5,171 GB/s (Radeon Instinct MI300X)
Shared memory	-

Connectivity and outputs

Types and number of video connectors present on GeForce GT 640M. As a rule, this section is relevant only for desktop reference graphics cards, since for notebook ones the availability of certain video outputs depends on the laptop model, while non-reference desktop models can (though not necessarily will) bear a different set of video ports.

Display Connectors	No outputs
HDMI	+
HDCP	+
Maximum VGA resolution	Up to 2048x1536

Supported technologies

Technological solutions and APIs supported by GeForce GT 640M. You'll probably need this information if you need some particular technology for your purposes.

3D Blu-Ray	+
Optimus	+

API compatibility

APIs supported by GeForce GT 640M, sometimes including their particular versions.

DirectX	12 API
Shader Model	5.1
OpenGL	4.5	of 4.6 (GeForce RTX 4090)
OpenCL	1.1
Vulkan	1.1.126
CUDA	+

Benchmark performance

Synthetic benchmark performance of GeForce GT 640M. 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.

GT 640M 2.40

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.

GT 640M 924

3DMark 11 Performance GPU

3DMark 11 is an obsolete DirectX 11 benchmark by Futuremark. It used four tests based on two scenes, one being few submarines exploring the submerged wreck of a sunken ship, the other is an abandoned temple deep in the jungle. All the tests are heavy with volumetric lighting and tessellation, and despite being done in 1280x720 resolution, are relatively taxing. Discontinued in January 2020, 3DMark 11 is now superseded by Time Spy.

GT 640M 1728

3DMark Vantage Performance

3DMark Vantage is an outdated DirectX 10 benchmark using 1280x1024 screen resolution. It taxes the graphics card with two scenes, one depicting a girl escaping some militarized base located within a sea cave, the other displaying a space fleet attack on a defenseless planet. It was discontinued in April 2017, and Time Spy benchmark is now recommended to be used instead.

GT 640M 7425

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.

GT 640M 1225

3DMark Cloud Gate GPU

Cloud Gate is an outdated DirectX 11 feature level 10 benchmark that was used for home PCs and basic notebooks. It displays a few scenes of some weird space teleportation device launching spaceships into unknown, using fixed resolution of 1280x720. Just like Ice Storm benchmark, it has been discontinued in January 2020 and replaced by 3DMark Night Raid.

GT 640M 9024

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.

GT 640M 3183

3DMark Ice Storm GPU

Ice Storm Graphics is an obsolete benchmark, part of 3DMark suite. Ice Storm was used to measure entry level laptops and Windows-based tablets performance. It utilizes DirectX 11 feature level 9 to display a battle between two space fleets near a frozen planet in 1280x720 resolution. Discontinued in January 2020, it is now superseded by 3DMark Night Raid.

GT 640M 80836

GeekBench 5 Vulkan

GT 640M 2732

GeekBench 5 CUDA

GT 640M 2200

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.

GT 640M 9

Gaming performance

Let's see how good GeForce GT 640M is for gaming. Particular gaming benchmark results are measured in frames per second. Comparisons with game system requirements are included, but remember that sometimes official requirements may reflect reality inaccurately.

Average FPS across all PC games

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

900p	26
Full HD	22
1200p	19

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

5−6

Full HD
Medium Preset

Assassin's Creed Odyssey	8−9
Battlefield 5	3−4
Call of Duty: Modern Warfare	6−7
Cyberpunk 2077	5−6
Far Cry 5	4−5
Far Cry New Dawn	6−7
Forza Horizon 4	10−12
Hitman 3	7−8
Horizon Zero Dawn	20−22
Metro Exodus	1−2
Red Dead Redemption 2	5−6
Shadow of the Tomb Raider	10−12
Watch Dogs: Legion	35−40

Full HD
High Preset

Assassin's Creed Odyssey	8−9
Battlefield 5	3−4
Call of Duty: Modern Warfare	6−7
Cyberpunk 2077	5−6
Far Cry 5	4−5
Far Cry New Dawn	6−7
Forza Horizon 4	10−12
Hitman 3	7−8
Horizon Zero Dawn	20−22
Metro Exodus	1−2
Red Dead Redemption 2	5−6
Shadow of the Tomb Raider	10−12
The Witcher 3: Wild Hunt	18
Watch Dogs: Legion	35−40

Full HD
Ultra Preset

Assassin's Creed Odyssey	8−9
Call of Duty: Modern Warfare	6−7
Cyberpunk 2077	5−6
Far Cry 5	4−5
Forza Horizon 4	10−12
Hitman 3	7−8
Horizon Zero Dawn	20−22
Shadow of the Tomb Raider	10−12
The Witcher 3: Wild Hunt	12−14
Watch Dogs: Legion	35−40

Full HD
Epic Preset

Red Dead Redemption 2

5−6

1440p
High Preset

Battlefield 5	4−5
Far Cry New Dawn	4−5

1440p
Ultra Preset

Assassin's Creed Odyssey	2−3
Call of Duty: Modern Warfare	1−2
Cyberpunk 2077	1−2
Far Cry 5	3−4
Hitman 3	7−8
Horizon Zero Dawn	6−7
The Witcher 3: Wild Hunt	2−3
Watch Dogs: Legion	14−16

1440p
Epic Preset

Red Dead Redemption 2

5−6

4K
High Preset

Battlefield 5	0−1
Far Cry New Dawn	1−2

4K
Ultra Preset

Assassin's Creed Odyssey	2−3
Assassin's Creed Valhalla	1−2
Call of Duty: Modern Warfare	1−2
Far Cry 5	1−2
Watch Dogs: Legion	0−1

4K
Epic Preset

Red Dead Redemption 2

3−4

Closest competitors

GeForce GT 640M's performance relative to its closest rivals among notebook graphics cards.

HD Graphics 620 101.25

Radeon HD 6750M 101.25

GeForce GT 645M 100.83

GeForce GT 640M 100

Radeon HD 7690M 98.33

Radeon 620 97.92

Iris Graphics 6100 97.5

AMD equivalent

According to our data, the closest AMD alternative to GeForce GT 640M is Radeon HD 6750M, which is faster by 1% and higher by 3 positions in our ranking.