Tested with and without ArchaicFix (and its associated dependencies SpongeMixins and falsepatternlib), all mods on latest versions. GregTech 6 adds certain information to items like metal bars and machine parts such as density, melting point, etc., that you can view by holding your mouse over them in NEI or in your inventory. You can see more information from some items with F3 + H, however ArchaicFix seems to remove these tooltips entirely regardless of whether you use F3 + H or not. Upon removal of ArchaicFix, the tooltips come back.
Tested with and without ArchaicFix (and its associated dependencies SpongeMixins and falsepatternlib), all mods on latest versions. GregTech 6 adds certain information to items like metal bars and machine parts such as density, melting point, etc., that you can view by holding your mouse over them in NEI or in your inventory. You can see more information from some items with F3 + H, however ArchaicFix seems to remove these tooltips entirely regardless of whether you use F3 + H or not. Upon removal of ArchaicFix, the tooltips come back.