Hello

https://mikrotik.com/product/CCR1036-8G-2Splus

On the page of the 4S version writes:
"The new r2 version has onboard 4GB of RAM, onboard M.2 slot, full size USB slot and dual PSU for redundancy!"

On the page of the 8G-2s+ writes:
"The new version of CCR1036-8G-2S+ has onboard 4GB of RAM, onboard M.2 PCIe 4x slot, full size USB slot and dual PSU for redundancy!"

The r1 had a single PSU.
I have noticed that I have an r3

routerboard: yes
model: CCR1036-8G-2S+
revision: r3
serial-number: **
firmware-type: tilegx
factory-firmware: 6.45.9
current-firmware: 7.11.2
upgrade-firmware: 7.11.2

What are the specific features of the r3 ?
thanks