Please keep in mind that a better GPU is not all that is needed to make darktable work faster. The CPU is also important. See these clockings (where lower numbers = faster execution). The same benchmark has been used on all combinations:
With the caveat that I don’t use noise reduction often, I edit on a four year old i5 desktop and raw files from the d850 don’t seem that slow to edit to me. Sure, CPU only isn’t blazing fast, but it is way more than acceptable.
Well I am a patient person. I think speed is not that bad if I have less than 10 instances. Also darktable 2.7/3 seems to be slower than darktable 2.6.
So if the Geforce MX 250 isonly 2-3 times faster than my current computer it’s ok for me, I’d count that as an improvement.
I bought it. Performance seems to be much better but it is loud - fan is almost always on, and I feel on my legs that it is always warm. The old one’s fan was almost always off. And it is uglier.
Apparently I will need to install Debian testing, Buster does not boot.
But it is really slim and light.
@betazoid Probably, your laptop has dual graphic cards. If so, you should configure some of the alternatives to turn off the second card while not using it, so you can save energy and have a cooler and quieter system when not doing stuff that requires it.
Apparently the Nvidia card really needs a lot of battery power. When on, my battery is empty after a little more than one hour. When off, it lasts for at least 5 hours.
No, I have no experience in that particular GPU – but I have installed Nvidia drivers for other GFXs (and sometimes that is a tricky business, especially if the distro believes that nouveau is sufficient…)
If my memory is correct, debian can be downloaded in several flavours, like “official Debian image builds”, as well as “unofficial builds which include non-free firmware”.
Since the official and free nouveau driver seems not to work for your kind of graphics, it sounds as if you are forced to install from an unofficial, non-free firmware version…