I'm using a r720xd with a p2000. When I first started I just had the CPU to encode with. What I found helped was setting a lower bit rate limit which allowed the CPU to transcode it fast enough.
Once I got a p400 that helped, but limits to 3 transcodes hurt the overall use since I would possibly have more than three hitting it at once. That's when the p2000 came along.
Bandwidth is important as well, so I still limit outside connections to 5mbps.
I'm using a r720xd with a p2000. When I first started I just had the CPU to encode with. What I found helped was setting a lower bit rate limit which allowed the CPU to transcode it fast enough.
Once I got a p400 that helped, but limits to 3 transcodes hurt the overall use since I would possibly have more than three hitting it at once. That's when the p2000 came along.
Bandwidth is important as well, so I still limit outside connections to 5mbps.