There are many scripts which display your computer/mIRC statistics to a channel, there's more simplistic ones such as
xCPU, or more advanced such as
mIRC stats.
You can also search websites such as:
www.mircscripts.comwww.mircscripts.orgwww.hawkee.comwww.google.comMoo.dll is often used within scripts (opposed to being used on its own) which displays various computer statistics when used properly.
I don't know of an addon or DLL that persistently displays statistics at the bottom of the channel window as in your display, if there is one, I would imagine it's very annoying.
Regards,