Answers and comments on What is the data storage capabilities onboard the James Webb Telescope? which reference the James Webb Space Telescope User Documentation item JWST Solid State Recorder mention that JWST's total onboard storage capability is almost 59 GB, and that
The rate at which science data can be written to the SSR is regulated by the ISIM Command and Data Handling subsystem (ICDH). The maximum ICDH sustained data rate is about 48 Mbits per second, including data packetization overheads. This corresponds to about six 2048 × 2048 full frame image files every 10.7 s...
48 Mbits/sec is 6 MB/sec and that would fill 59 GB in about 160 minutes if it ran flat out which it wouldn't always do.
Question: Some deep space telescopes have onboard data processing capabilities to reduce the burden on the downlink, for example GAIA has a SCS750 PowerPC Board with triple redundancy and TESS has an Athena-3 Single Board Computer (SBC) (and) a Re-Configurable Computer (RCC) with three Virtex-5 FPGAs. What are the general properties and specs for JWST's onboard data and image processing capabilities? Is there a rack full of processors or GPUs? A total gigaflop specification?
As an aside, TESS has 192 GB of mass data storage or three times what JWST will have!