(usr-tc) Max for DSP cards on TC

I have a TC chassis currently running seven channelized T1s. I have read the maximum for 1 HARC is 10 DSP. Now, in the past we have tried running 10+ DSP cards with 1 HARC and the chassis did not perform as well as a chassis that not fully loaded. (This is from records, I wasn't actually working with the TC when this happened). Is there any issues I should know about before trying to run a TC chassis with 8+ DSP cards? -Cheryl Johnson SEI Data Network Services, Inc. A Division of SEI Communications