NVIDIA started GeForce GT 645M 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 1.8 GHz are supplied, and together with 128bit memory interface this creates a bandwidth of Up to 64.0 GB/s.

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

General info

Some basic facts about GeForce GT 645M: architecture, market segment, release date etc.

Place in performance ranking	802
Place by popularity	not in top-100
Value for money	0.23
Architecture	Kepler (2012−2018)
GPU code name	N13P-GS
Market segment	Laptop
Release date	22 March 2012 (12 years ago)
Current price	$310	of 168889 (A100 PCIe 80 GB)

Value for money

Performance to price ratio. The higher, the better.

Technical specs

GeForce GT 645M's specs such as number of shaders, GPU base clock, manufacturing process, texturing and calculation speed. These parameters indirectly speak of GeForce GT 645M's performance, but for precise assessment you have to consider its benchmark and gaming test results.

Pipelines / CUDA cores	384	of 20480 (Data Center GPU Max NEXT)
CUDA cores	384
Core clock speed	Up to 710 MHz	of 2610 (Radeon RX 6500 XT)
Number of transistors	1,270 million	of 14400 (GeForce GTX 1070 SLI Mobile)
Manufacturing process technology	28 nm	of 4 (Radeon 780M)
Power consumption (TDP)	32 Watt	of 2400 (Data Center GPU Max Subsystem)
Texture fill rate	22.7 billion/sec	of 969.9 (H100 SXM5 96 GB)
Floating-point performance	544.5 gflops	of 16384 (Radeon Pro Duo)

Size and compatibility

Information on GeForce GT 645M's compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. 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.

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

Memory

Parameters of memory installed on GeForce GT 645M: 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 192 (Radeon Instinct MI300X)
Memory bus width	128bit	of 8192 (Radeon Instinct MI250X)
Memory clock speed	1800 MHz	of 23000 (GeForce RTX 4080 SUPER)
Memory bandwidth	Up to 64.0 GB/s	of 3276 (Aldebaran)
Shared memory	-

Video outputs and ports

Types and number of video connectors present on GeForce GT 645M. 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

Technologies

Technological solutions and APIs supported by GeForce GT 645M. You'll probably need this information if you need some particular technology for your purposes.

3D Blu-Ray	+
Optimus	+

API support

APIs supported by GeForce GT 645M, 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 645M. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark performance 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 645M 2.39

Passmark

This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. 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.

Benchmark coverage: 25%

GT 645M 927

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.

Benchmark coverage: 17%

GT 645M 7357

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.

Benchmark coverage: 17%

GT 645M 1845

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.

Benchmark coverage: 14%

GT 645M 1152

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.

Benchmark coverage: 14%

GT 645M 8655

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.

Benchmark coverage: 9%

GT 645M 2590

Unigine Heaven 3.0

This is an old DirectX 11 benchmark using Unigine, a 3D game engine by eponymous Russian company. It displays a fantasy medieval town sprawling over several flying islands. Version 3.0 was released in 2012, and in 2013 it was superseded by Heaven 4.0, which introduced several slight improvements, including a newer version of Unigine.

Benchmark coverage: 4%

GT 645M 18

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.

Benchmark coverage: 4%

GT 645M 9

Gaming performance

Let's see how good GeForce GT 645M 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	30
Full HD	24

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

5−6

Full HD
Medium Preset

Assassin's Creed Odyssey	3−4
Battlefield 5	4−5
Call of Duty: Modern Warfare	10−12
Cyberpunk 2077	5−6
Far Cry 5	3−4
Far Cry New Dawn	2−3
Forza Horizon 4	5−6
Hitman 3	4−5
Horizon Zero Dawn	3−4
Red Dead Redemption 2	5−6
Shadow of the Tomb Raider	9−10
Watch Dogs: Legion	0−1

Full HD
High Preset

Assassin's Creed Odyssey	3−4
Battlefield 5	4−5
Call of Duty: Modern Warfare	10−12
Cyberpunk 2077	5−6
Far Cry 5	3−4
Far Cry New Dawn	2−3
Forza Horizon 4	5−6
Hitman 3	4−5
Horizon Zero Dawn	3−4
Metro Exodus	3−4
Red Dead Redemption 2	5−6
Shadow of the Tomb Raider	9−10
The Witcher 3: Wild Hunt	6−7
Watch Dogs: Legion	0−1

Full HD
Ultra Preset

Assassin's Creed Odyssey	3−4
Battlefield 5	4−5
Cyberpunk 2077	5−6
Far Cry 5	3−4
Far Cry New Dawn	2−3
Forza Horizon 4	5−6
The Witcher 3: Wild Hunt	6−7
Watch Dogs: Legion	0−1

1440p
High Preset

Call of Duty: Modern Warfare	5−6
Hitman 3	5−6
Horizon Zero Dawn	9−10
Metro Exodus	1−2
Red Dead Redemption 2	1−2
Shadow of the Tomb Raider	6−7

1440p
Ultra Preset

Cyberpunk 2077	1−2
Far Cry 5	4−5
Forza Horizon 4	0−1
The Witcher 3: Wild Hunt	3−4

4K
High Preset

Call of Duty: Modern Warfare	2−3
Hitman 3	2−3
Horizon Zero Dawn	7−8
Red Dead Redemption 2	1−2

4K
Ultra Preset

Assassin's Creed Odyssey	1−2
Assassin's Creed Valhalla	1−2
Far Cry 5	4−5
Far Cry New Dawn	6−7

Relative performance

Overall GeForce GT 645M performance compared to nearest competitors among notebook video cards.

Radeon R7 M445 101.67

Radeon HD 6750M 101.26

HD Graphics 620 100.84

GeForce GT 645M 100

GeForce GT 640M 99.16

UHD Graphics 24EUs (Alder Lake-N) 97.91

Radeon R7 M440 97.91

AMD equivalent

According to our data, the closest AMD alternative to GeForce GT 645M is Radeon HD 6750M, which is faster by 1% and higher by 2 positions in our ranking.