Hello,
HT is recommended with ASIO Guard since Cubase 7 / Nuendo 6, but we’ve seen a few systems where HT created issues, so Chris’ recommendation is valid. There are a couple things you can check before tweaking the BIOS/EIST, though.
Does the spiking occur also with ASIO Guard off? Does the spiking get worse when hovering on the VSTs GUIs?
Besides the KB article linked by Chris, may you please have a look at this post and let me know what you did already?
Soft-eLicenser (SeL) FAQ - Cubase - Steinberg Forums - You can also PM me.
I will look for the e-mails you sent and drag them to my folder. Thank you.
Kind regards,