I just got a qhy5iii290m as an upgrade as I am about to switch to an oag setup and was testing the frame rate on it as I would like to use it for planetary as well. Based on the qhyccd website, the camera should be able to achieve 135fps at native resolution of 1920x1080. I have tested this on my mini pc (N5000 processor with 8 gb of ram and samsung 970 evo nvme drive) as well as my Ryzen 9 desktop (128gb ram and samsung 980 pro nvme) . For the setup I basically installed the all in one driver, updated with the ascom 6.5 driver, and let her rip. In both tests I used the same usb cable and got similar results in sharpcap and firecapture.
minipc: 5-10% dropped frames and a maximum of 40fps
desktop: 0% dropped frames and a maximum of 51fps
Did anyone, who is using this camera, get to 135fps with it? The only setting I can find to tweak is the usb speed, but ~50fps seems to be the limit. I am trying to understand why Im seeing the dropped frames on the mini pc even with a 1ft usb cable... I disconnected all other usb devices but that didnt fix it. Advice/Opinions appreciated.