Latency in C10 not in C9.5 with same settings

I am having noticeable latency problems with C10 Pro that didn’t exist with C9.5 Pro even though the setting are the same. I usually run my buffer set at 512 and never have any noticeable latency even with a large track count of audio files, but with v10 I can set buffers at 64 or even 32 on a song with only 4 audio tracks and there is a delay, Makes it impossible to overdub. Am I missing something? I am running a lynx Aurora 16 with the AES16e card, 96K 32bit, Win10