I'm about to purchase a 1440P monitor. Is Dxtory capable of recording at 2560x1440? If so, can I expect a drastic change in the performance hit vs 1080p recording?
afaik, dxtory can record whatever resolution your codec of choice can support.
for instance, packbit codec http://exkode.com/packbit-specs-en.html (http://exkode.com/packbit-specs-en.html) says
QuoteMaximum Resolution: 16384 x 16384
I'd assume dxtory's own codecs go to atleast that as well, lagarith, utvideo codec, x264 or whatevers might have a cap a bit lower, no idea. But I'd assume atleast 4k is supported by those.
But yea, 2560x1440 is about 1.7 times 1920x1080, so you'd probably start to require 70% more disk space + cpu resources required by your codec of choice.