General Set partial bonuses: applies to having any two or more different items in the set.

There are two different kinds of Partial bonuses: Set bonuses don't apply if they're sitting in your stash or Inventory. You must wear Set Items to receive Partial or Full Set Bonuses.

These Set Bonuses can be different depending on the pieces being combined. Sets also offer Partial Set Bonuses, meaning that you will get extra bonuses if you are wearing 2 or more pieces of the set. For a complete list of all 2.4 Set Item changes, please see the following guide: Several sets were updated in Patch 2.4, and the changes have been applied to this guide. In general, Set weapons tend to be underwhelming, although there are some key exceptions to this, often in Caster sets. Small sets without weapons are often the most versatile and can be fit in and around more powerful items. In general, sets are not as powerful as separate collections of Rare, Unique, and Runeword items, but still can be worth considering. Some pieces within a set may have a lower character level requirement and can be worn earlier. The average set has 4 pieces, but sets can range from 2 to 6 items. There are some sets that contain no weapons, and 1 set that's only a pair of weapons. There are 33 Sets in D2:R, usually comprised of a mix of armor and weapons. As you add pieces to the set, you add powers as well, with a very large increase in power if you manage to acquire the entire set. Some are targeted at specific classes or roles. This describes items that work together as groups of gear, nearly all named after an iconic figure in Diablo's lore. Welcome to Wowhead's guide to Gear Sets in Diablo II: Resurrected Patch 2.7 & Ladder Season 4.

Diablo 2 resurrected items list