UE4 4.4.2 and SDK 0.4.1 here.
HMD SP 100 boosts my frame rate up to 120fps from 60-75fps but is freezes my Rift. It becomes unresponsive.
The feed fluctuates from 65-75fps on the DK2 on a GTX680 (2GB) card on the Realistic Rendering demo scene.
new portrait rotation spec for the DK2 screen and vertical tearing is killing developers trying to push FPS limits on next gen development. The DK1 could at least stand to drop to 40-50fps and it was bearable. 65-74fps and it’s excruciating on the DK2!!
EDIT:
“HMD TIMEWARP” solved my judder, now butter smooth synced 75fps
HMD SP 100 still freezes my DK2 screen.