Recommended 6gb of ram, but 4gb has worked to some extent with my testing but it might become little after building a lot
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Type in the modpack name (C375) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select C375 from the list on the left. The launcher will handle everything else!