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https://www.juniper.net/documentation/en_US/release-independent/junos/topics/reference/general/routing-engine-m-mx-t-series-support-by-chassis.html#sec-mx240-res

NEXT GENERATION ROUTING ENGINE:

https://kb.juniper.net/resources/sites/CUSTOMERSERVICE/content/live/TECHNOTES/0/TN303/en_US/NextGenRoutingEngine_Tech_Intro.pdf

RE-S-X6-64G: 6-core Haswell CPU, Wellsburg PCH based routing engine with 64GB DRAM and 2x 64GB SSD storage for MX240/MX480/MX960

REMX2K-X8-64G: 8-core Haswell CPU, Wellsburg PCH based routing engine with 64GB DRAM and 2x 64GB SSD storage for MX2020 and MX2010

RE-PTX-X8-64G/CB2-PTX: 8-core Haswell CPU, Wellsburg PCH based routing engine with 64GB DRAM and 2x 64GB SSD storage for PTX5K In addition to the Mt Rainier RE, a new control board shall be supported.