Can I use a longer thunderbolt replacement cable?

I'll be using the Blackmagic eGPU Pro with 27" iMac 4.2GHz quad-core 7th-generation Intel Core i7 processor, 64GB 2400MHz DDR4, 2TB Fusion Drive Radeon Pro 580 with 8GB video memory

Blackmagic eGPU Pro

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  • Short answer, yes. However if you are using a Thunderbolt 3 cable longer than apple's 0.8m you will need to make sure it is an active Thunderbolt cable. Most of the short Thunderbolt 3 cables are shorter than 0.8m [actually details list most are under 0.5m] because they are passive cables and lose the ability to handle the full Thunderbolt 3 data transfer rate if they go longer. [Full 40Gbps vs 20Gbps] There is a lot of information out on the web about what an active vs. passive Thunderbolt 3 cable, but whatever cable you use it will need to be a true Thunderbolt 3 cable, not a USB-C cable and not an apple charging cable. How that answers your question. E_

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  • If your iMac has Thunderbolt 3 ports then yes it will connect. If not, don't bother. Then BMD eGPU has the newer RX 580 card with 8GB GDDR RAM. I just got mine today and the label said it was manufactured on 1-9-20 and has the upgraded card vice the PRO 580. If you don't have Thunderbolt 3 ports then forget the BMD eGPU. If it does then yes, you will need to get a longer Thunderbolt 3 cable. The provided cable is very short, probably intended to connect a Macbook Pro to the unit.

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