OPNsense Ghz desktop appliance
all OPNsense appliances come with the e-book:
'pfSense The Definitive Guide'
The OPNsense desktop edition is an out-off-the-box firewall experience, with the pfSense open source firewall software in an embedded, fan-less appliance that consumes less than 10Watt, with all the features you might expect from commercial firewall solutions for a fraction of the cost.
1.1Ghz or 1.6ghz
Intel Atom Z510/Z530 CPU, for enhanced performance.