Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 445M v2 GeForce GT 645M
Cyberpunk 2077 707% 707%
Assassins Creed: Valhalla 638% 638%
Call of Duty: Black Ops Cold War 614% 614%
Hitman 3 950% 950%
Grand Theft Auto VI 1036% 1036%
FIFA 21 307% 307%
Far Cry 6 1068% 1068%
Genshin Impact 707% 707%
World of Warcraft: Shadowlands 1057% 1057%
Watch Dogs Legion 679% 679%

In terms of overall gaming performance, the graphical capabilities of the GT 445M and the GeForce GT 645M are equal.

The GeForce GT 645M has a 140 MHz higher core clock speed and 8 more Texture Mapping Units than the GT 445M. This results in the GeForce GT 645M providing 9 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce GT 645M has a 140 MHz higher core clock speed than the GT 445M and the same number of Render Output Units. This results in the GeForce GT 645M providing 2.3 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce GT 645M was released over a year more recently than the GT 445M, and so the GeForce GT 645M is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GT 445M.

The GeForce GT 645M has 1024 MB more video memory than the GT 445M, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The GT 445M has 11.2 GB/sec greater memory bandwidth than the GeForce GT 645M, which means that the memory performance of the GT 445M is slightly better than the GeForce GT 645M.

The GeForce GT 445M v2 has 144 Shader Processing Units and the GeForce GT 645M has 384. However, the actual shader performance of the GT 445M is 164 and the actual shader performance of the GeForce GT 645M is 273. The GeForce GT 645M having 109 better shader performance is not particularly notable, as altogether the GT 445M performs better when taking into account other relevant data.

The GeForce GT 645M transistor size technology is 12 nm (nanometers) smaller than the GT 445M. This means that the GeForce GT 645M is expected to run slightly cooler and achieve higher clock frequencies than the GT 445M. While they exhibit similar graphical performance, the GeForce GT 645M should consume less power than the GT 445M.

The GeForce GT 445M v2 requires 35 Watts to run and the GeForce GT 645M requires 32 Watts. The GT 445M requires 3 Watts more than the GeForce GT 645M to run. The difference is not significant enough for the GT 445M to have a noticeably larger impact on your yearly electricity bills than the GeForce GT 645M.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed570 MHzvs710 MHz
Boost Clock-vs-
ArchitectureFermi GF106-N11E-GE-A1Kepler GK107
OC Potential Fair vs Fair
Driver Support Poor vs Good
Release Date03 Sep 2010vs01 Oct 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
6
vs green tick
6.4
1600x900
4.5
vs green tick
4.9
1920x1080
3.4
green tick vs green tick
3.4
2560x1440
2.3
vs green tick
2.4
3840x2160 - vs green tick
1.5

GPU Memory

Memory1024 MBvs2048 MB
Memory Speed625 MHzvs900 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeGDDR5vsDDR3
Memory Bandwidth40GB/secvs28.8GB/sec
L2 Cache 384 KB green tick vs 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units144vs384
Actual Shader Performance8%vs13%
Technology40nmvs28nm
Texture Mapping Units24vs32
Texture Rate13.7 GTexel/svs22.7 GTexel/s
Render Output Units16vs16
Pixel Rate9.1 GPixel/svs11.4 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs0
DVI Connections1vs0
HDMI Connections1vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power35 Wattsvs32 Watts
Recommended PSU--

GPU Features

DirectX12.0vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.5
Open CL-vs-
Notebook GPUyesyes
SLI/Crossfirenovsno
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-540M 2.53GHzvsIntel Core i5-3210M 2.5GHz
Recommended RAM4 GBvs4 GB
Maximum Recommended Gaming Resolution1600x900vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GT 445M v2 is a Fast-Middle-Class Mobile Graphics Card based on the first revision of the Fermi Architecture.

Architecture
The Fermi Architecture is manufactured with a 40nm technology and uses a technique known as Hot Clocking: The Shaders are clocked twice as fast as the Central Unit. While this leads to a reasonable performance boost, it causes enormous amounts of energy dissipation, leading, ultimately, to a significantly higher operating temperature.
Fermi is also the first GPU architecture with fully cached memory access which increases memory performance.

GPU
It equips a GPU Codenamed GF106-N11E-GE-A1 which has 3 Stream Multiprocessors activated and thus offers 144 Shader Processing Units, 24 TMUs and 16 ROPs. The Central Unit is clocked at 570MHz.

Memory
The GPU accesses a 1GB frame buffer of fast GDDR5, through a 128-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 625MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for Optimus, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies

Power Consumption
With a rated board TDP of 35W, it is suited for 15" or larger laptops.

Performance
Gaming benchmarks put its performance almost on level with the desktop GeForce GT 450 v4.

System Suggestions
We recommend a decent processor (Intel Core i5 Mobile) and 4GB of RAM for a system with GeForce GT 445M v2.
Overview
GeForce GT 645M is a Fast-Middle-Class Mobile Graphics Card based on the first revision of the Kepler Architecture.

Architecture
The Kepler Architecture was NVIDIA's big step to power efficiency. Each Stream Multiprocessor (SMX) now hosts 192 Shader Processing Units - against the 48 of older Fermi Architecture, and has been redesigned being now clocked at the same speed of the Central Unit. This means they are more energy efficient and will consequently lead to cooler operating temperatures. However, it also means they are weaker. It can be said that one Fermi SMX is as fast as 2 Kepler SMXs.
Additionally, and not available in all GPUs, Kepler also introduced the Boost Clock Feature. The Boost Clock is an even higher Clock Speed activated when in gaming mode and becomes the effective speed of the GPU.

GPU
It equips a GPU Codenamed GK107 which has 2 Stream Multiprocessors activated and thus offers 384 Shader Processing Units, 32 TMUs and 16 ROPs. The Central Unit is clocked at 710MHz.

Memory
The GPU accesses a 2GB frame buffer of DDR3, through a 128-bit memory interface. The size of the frame buffer is exaggerated and in no way benefits the GPU. The Memory Clock Operates at 900MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for Optimus, CUDA, OpenCL, DirectCompute, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies

Power Consumption
With a rated board TDP of 32W, it is suited for small laptops.

Performance
Gaming benchmarks indicate its performance stands somewhere between GeForce GT 640M & GeForce GT 650M.

System Suggestions
We recommend a decent processor (Intel Core i5 Mobile) and 4GB of RAM for a system with GeForce GT 645M.
Recommended CPU
Possible GPU Upgrades
N/A
N/A
GPU Variants
-
-