Pretty much little difference between ProRes codecs for processing time- the main difference is the presence of an alpha channel and bitrates. The actual encode is the same speed. Which is to say if you have a *lot* of RED to transcode you should dig in for some long overnight renders or rent a RED Rocket card.
Beyond what Noah says, you should also dig into Redcine-X's preferences and switch encoding to Redline (the exact setting is in your export presets) and toy around with the number of simultaneous files (this is in main program preferences). Processing 2-4 files simultaneously will lighten the load, just make sure you read from one drive and render to a second, and adjust the number based on processor load.
Great price if you'll be doing lots of transcoding. Just know that if you are looking to trim a couple percentage points off your total render time, tweaking in the software will help you shave some time off. If you are looking to halve your time or better without using the RR card, you are out of luck. As the car guys say, "Theres no replacement for displacement." In other words, you need one of 2 things to encode RED footage, Lotsa time (5x real time or more) or lotsa horsepower (RR card. Or 2).
Also, check your debayer settings. If you shot at 4-5k, but are transcoding to 1080p, you might be able to get away with not doing a full debayer. Do some tests at 1/2 debayer and full, and see if you (or the client) can see the difference. Will mostly show in the detail and edges, I've found.
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