best software for multicam video production We have records from 30 cameras (couple TBs of video files), which were started almost simultaneously, part of them were action cameras (so no timecode here, and there are gaps because of battery replacement), other part were usual hd cameras with time codes embeded to video files.
All video is 1080p25.

We need to sync all videos together, and then render all 30 sequences after color correction and cutting.I have tried adobe premiere cc, but is was real pain, especially rendering with crushes and other glitches.

Is there any alternative for Premiere?
We have quite recent workstations running windows 7 with consumer video cards (both ati 7970 and nvidia 680 are available), so it will be great if software can do distributed rendering and use gpu. We also have couple of 2 year mac pro, so osx only software can also be of use.
Premiere is your best option unless you plan on spending a boatload (thousands and thousands) on an Avid system.  I'd suggest working on smaller sets of cameras at a time and then working off the combined feeds.  You can use multicamera editing mode with several cameras at a time, make the best choices out of those and then run each of those sequences in to another multicamera sequence to further resolve them.

The process is going to kind of suck no matter what system you do it on because it is a boatload of synchronous footage to go through.