Agree best way to find out is try..
No clue what Fibe is... But I can say I have no problem playing high bitrate HD video feeds from C/Ku Band satellite on my Rpi3...
A raspberry pi will perform best when some steps are taken to keep it cool.
Recommend one of them Flirc cases, where the aluminum case assumes the
the role of heatsink. Doing that ya can get away without using a fan which you said ya wanted to do.
You can run them without any cooling at all but will be subject to the clock throttling down
as it heats up. Which in turn will cut in to performance.
Month or two ago I put together a desktop PC for my wife. Of course she HAS to have a Desktop...
Like OK, whatever...
It has a quad core Intel cpu, with No CPU fan at all, just a quiet fan on the power supply is all. Can't even tell it is on.
It consumes a total of 22 watts from the AC Line as measured on my Kill-A-Watt meter,
while sitting there, and about 30 watts when it's busy compiling the linux kernel.
I have it hooked up to a 22" TV that she uses as a Monitor.
There are some extremely efficient Motherboards out there.