A good miner gives more hashes than cryptodredge. But he ate all my RAM!

My config:
11 x RX470 mining ethereum
8 x p106-100 mining XZC
4Gb RAM
60-100gb at virtual memory (it's enough)

Cryptodredge works fine and system use 3.0-3.2 gb
TT-Miner ate 4gb memory and system crashes
I try to run only 4 card on tt-miner, and everything was fine, there was enough RAM.

PS: hashes and config
p106-100 6gb
pl63, core +100, memory +420
Cryptodredge 1250
TT-Miner (-i=20) 1350

You can get more hashes, but energy efficiency will get worse.