  PANDA is one of the major experiments currently under construction at
FAIR/Darmstadt. Its focus is physics with high intensity and high quality
anti-proton beams with momenta up to 15 GeV/c. Event rates up to 20MHz, and a
typical event size between 1.5 KB and 4.5 KB. lead to data rates as high as 200
GB/s. A trigger-less streaming DAQ system is introduced in this paper,
featuring event filtering based on FPGAs and a CPU/GPU farm. The Compute Node
(CN) is the central board FPGA based component in this system. A new version of
the ATCA based CN is presented. Its main features include high speed data
transmission, massive data buffering capabilities to support large latency for
complex decion algorithms, high performance data processing and ethernet
connectivity. First test results with a prototype are presented.
