My playback of footage that is sped up 500% is awful in PP CC 2018 on my desktop but fine on my laptop. My CPU utilization is not maxing out on my desktop but I'm still dropping 90% of my frames. I'm using 1/4 resolution for playback, have plenty of memory allocated to PP, have memory usage set to "performance", etc.
Desktop specs: 6700K 32GB 3200Mhz GTX1070
My laptops specs are not as good but seems to be fine with the playback of the exact same timeline. I'm curious if there's something I'm forgetting or not thinking about.