Interesting unit inside. I was not expecting some odd looking custom Intel CPU. I'm not 100% sure why this is labeled Fortigate 80CM. I believe it is a variant of the Fortigate 80C.
The Intel CPU is an EP80579 NU80579EZ600C single core 600 MHz processor. It uses the FCBGA1088 mounting layout.
https://www.intel.com/content/www/us/...