r3d is 100% dependent on your CPU speed. This is because red doesn’t allow debayering on your gpu. So your graphics card is not the reason for your low performance.
To increase performance, either get a faster CPU (still probably wouldn’t be real time), get a red rocket (still not real time at 5K or with more than one stream at 4k) or transcode to an intermediary codec (this is what I usually do).
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