This one?

Is dedicated GPU on a T420 desirable or a con?

Can you disable Nvidia in bios?

how can hardware be a con

but yes almost every laptop has a switch in bios that lets you disable discrete gpu (if it supports nvidia optimus to begin with)

quite easily if you consider litle to no use of dedicated GPU for the power cost

on average "i need internet" laptop

this Nibba with my stuff is some sort of Superhuman

@Tervy that's why nvidia optimus is a thing

and yes all similar techonologies from all other manufacturers too

its just that their algos tend to throw GPU on even while you dont want

Mine just turns itself off when it's not used
I have the option to choose my GPU when I start up programs too

same

in fact you can even go into the nvidia control panel and set a default gpu for every application

This

also the fact that optimus causes more harm than good in most operating systems outside of windows

Wat

Its just an fps limiter

That also downclocks the GPU to save power

no that doesn't have anything to do with optimus

that's just the driver doing that

Its basically the equivalent of pressing the eco button on a car

But you need the oem one ofc

@Goz3rr actualy gpus with optimus have long history of problems relating their use on linux/mac/bsd

and even some older windows versions

But I mostly dont use the GPU at all while using the battery
Intel hd 530 does the job and If i really wanted to play fortnite I could just turn on optimus and shift

wouldn't know about that, and iirc optimus is only supported on 7 and up

not just drivers but the optimus is part of how those things are wired and how they can toggle parts unnecessary off

It's a driver that communicates with hardware property's

Its not needed but its handy

nvidia optimus includes some hardware too

since only one gpu can be in control of the video outputs

You can use the full sillicon of the GPU but turning several parts of it is left to a driver

Optimus does more good than harm just like @Goz3rr pointed out

Also
>running a modern GPU with anything older than windows 7

as there is some stubborness here

https://lambda.sx/F4u.png now that im on proper computer i can happily argue about hardware

i didnt feel the need to hilight that >has both software and hardware components

which later ones make/made(havent checked fix for it due not my problem) certain operating systems and situations broken

so gpu sitting idling and still using power vs no power to gpu == its obviously does more harm than good in our scenario where there is no use for it in "daily browsing computer"