There may be some uncertainty about how to count switch chip buffer memory. Arista claims 9.5 MB in their datasheet, and clsims less (8 MB) in a table somewhere else. Falling back to Intel, a full data sheet is available. 7.5 MBytes in the amount of packet memory. 9.5 Mbytes is the total on-chip RAM that includes memory for pointers and other non-data things. Thanks to Olivier Montanuy for pointing out this discrepancy.