zaphod Posted January 6, 2017 Share Posted January 6, 2017 (edited) (Sorry, this is in the wrong forum. Oops.) Hi all, Currently running a Mac mini (Late 2012), 16GB RAM, with an Akitio Thunder2, Asus R9 270 Overclocked 2GB GDDR5 DirectCU-II Cooler, powered by an EVGA 500W power supply. OS is currently 10.12.x, but I have seen this issue with 10.9.x through 10.12.x. Generally, it runs great. It's fast and works well. Until it doesn't. After a random period of time (15 mins to 15 hours), things get all stuttery, gradually worsening until it eventually reboots the system. This does not ever happen when using the built-in GPU, only when using the eGPU. Could this be an issue with using an AMD card rather than a Nvidia card? Would a GTX likely remove this issue? Are others seeing this, and is there a fix? In terms of troubleshooting, it doesn't log anything when this happens. Any ideas? Edited January 6, 2017 by zaphod Link to comment Share on other sites More sharing options...
irokez Posted January 11, 2017 Share Posted January 11, 2017 It looks like it would be a power supply issue. 500W is not 500W for 12V in some cases, depending on your PSU. Read your User manual of your PSU how much Ampere yo have on a single 12V-line. Some PSU allocates the second 12V-line for CPU only. Example: 22A on first 12V-line = 264W for eGPU + Akitio 22A on second 12V-line = 264W for CPU only Check the specifications of your PSU and eGPU. Link to comment Share on other sites More sharing options...
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