There are 3 websites I recommend visiting:
- Ethical Consumer
This article scores 15 laptops brands on use of conflict minerals and toxic chemicals, worker rights, carbon reporting and tax avoidance.
The manufacturer of Iameco is listed as a bad choice when it comes to use of conflict minerals and worker rights, but they do score well
on use of toxic chemicals and tax avoidance.
- Greenpeace Guide to Greener Electronics
This report is a bit older (2017) and rates 17 major consumer electronics companies. Greenpeace primarily looked at:
three critical impact areas tied to product design and responsible supply chain management across the electronics sector:
- Energy: Reduction of greenhouse gases through efficiency and renewable energy
- Resource Consumption: sustainable design and use of recycled
- Chemicals: Elimination of hazardous chemicals from both the product itself and manufacturing
Labour conditions and other social responsibilities are not included.
- Conflict minerals company rankings
This report is also from 2017 and rates the largest electronics companies on their usage of what they call "conflict-free" minerals in their products.
Companies were ranked based on four core categories of criteria:
- Conducting Conflict Minerals Sourcing Due Diligence and Reporting
- Developing a Conflict-Free Minerals Trade and Sourcing Conflict-Free Minerals from Congo, Particularly Gold
- Supporting and Improving Livelihoods for Artisanal Mining Communities in Eastern Congo
- Conflict-Free Minerals Advocacy
There is no clear winner in the Ethical Consumer report; companies that score well in 1 category score badly in another so it depends on what you think is most important. In the Greenpeace report the clear winner is Fairphone, but they sell smartphones and not laptops. Best laptop seller is Apple, followed by HP. Apple and HP also score well in the conflict minerals report.
As mentioned by Pheidlauf in their comment above the greenest choice is to continue using your current laptop if you have one. Repairing or upgrading it is a better choice than buying a new one. Older laptops can become very slow if you run Windows, but you could install Linux instead.
Disclaimer: I have no affiliation with any of the sites or brands mentioned in this post (other than owning a Fairphone and making a small donation to Greenpeace every month).