CRS309-1G-8S+IN question

Hardware MikroTik hardware general
1

Hello, I recently bought a CRS309-1G-8S+IN, along with 4, S+RJ10’s. however, after looking online to figure out why I couldn’t enable jumbo frames, I noticed that the MIkroTik page says
“Any MikroTik device with active cooling that has SFP+ ports can now be used…”
“S+RJ10 module is supported also on devices with passive cooling, but may require an extra cooling.”
and "New revision of S+RJ10 comes with several improvements:

  • Jumbo frames up to 10218 Bytes are now supported"

and thus, my questions

  1. How can I tell I’m getting the latest revision of the S+RJ10’s?
  2. do I need to buy anything extra for the CRS309-1G-8S+IN in order to use them with out worry? (my main question) as the 4 I had got really hot.


    TIA
2

Re: 1) - according to this, the revised models have “/R2” at end of serial number:
http://forum.mikrotik.com/t/s-rj10-revisions/125461/1

Re: 2) - see here:
https://wiki.mikrotik.com/wiki/S%2BRJ10_general_guidance