Something in the Nvidia or Intel settings may be different between the GTX850m and GTX680m defaults or between the Intel HD4400 and Intel HD4000 defaults. Optimus isn't a problem on my system with a Nvidia GTX 680m (also 340.43 on 64-bit Windows 8.1) and Intel HD4000 (10.). For most people (myself included its the opposite). I find it odd that your present queues are higher than your render queues. What setting are you using in madVR? Did you enable any NNEDI3 options (like image doubling or image upscaling)? (which will add a registry key for the nvidia in the madVR area). How did you tell it to default to the nvidia? Did you rename the mpc-hc exe (if you're using hc as opposed to BE)? When running on intel HD, i get even lower numbers: 2ms for render and 0.14ms for present. MadVR settings do not seem to have any impact on the present time either. but as I said, present is still unreasonably large. Setting "maximum performance" in the nvidia control panel gets me smooth playback and roughly halfs the render(4ms) and present(8ms) times. ![]() Also the present time seems unreasonably large, especially when compared to my desktop times, were its mostly below 1ms. for some reason however are the render(8ms) and present(15ms) stats way below the movies frame interval (41.71ms), yet unable to fill the queue. This causes frame drops (render and present queue not getting filled fast enough) obviously. ![]() The card sticks to low clockspeeds when playing a few seconds or minutes after playback started, regardless what the GPU usage is. I setup mpc like i did on my desktop (lav+ffdshow+reclock+xyvobsub+madvr) and configured the Optimus system to default to the nvidia card on playback. ![]() I got a fantastic new laptop with a GTX850M (and Intel HD4400).
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