Your sync is basically downloading and assembling the blockchain using a peer to peer torrent protocol similar to BitTorrent.
Increasing your processing power will not significantly decrease your sync time as your sync speed is mainly based on peer to peer download speed and the process limits itself for each user in favor of delivering the blocks to everybody as quickly and evenly as possible.
The best thing you can do to ensure a complete sync first try is to make sure you are connected to at least one full node when you start the sync.
This should help you get the full chain without getting stuck and having to re-sync, but nothing except downloading the blockchain (which is not really a good idea … another conversation) will speed up your sync.