TB3 Active cable performance
Hey guys, I have a question that has been digging through my brain for quite a bit. Is there any performance degradation when you use a long TB3 Active cable (2m) vs a short passive one? (50cm). I'm asking because the way my setup is laid out I really need the 2m cable, but I'm not sure if I'm being penalized for it...
I can give it a try tonight or tomorrow. I've been using a short passive cable with the Razer core X on my desk. I have a 2m active cable on hand. It would be nice to reclaim some desk space!
I don't think there is a difference. You can always buy it and do some benchmarks, return it if there's a large dip. Frankly I'd probably just use it and see if you NOTICE anything. Benchmarks are good for comparisons, but it's really more important how you feel using it.
I don't think cable length matters. Speed of electricity is very fast. an extra 1.5m will add up to a handful of micro seconds to the time it takes for a bit to reach the other end. This is not a problem because many bits are sent before expecting a reply.
Problems can arise if the extra length adds errors but the active part of the cable handles that.
Drop in performance happens when you chain multiple Thunderbolt 3 devices together.
Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts
2m active 40Gbps TB3 cable benched giving full H2D bandwidth at: