By coincidence, I inherited the RAM and CPU from the work computer of a guy who later shot up my workplace. Luckily he was the only one killed in the shooting. I still use the kit from the shooter to run my home server.
Aren't you worried that the ones and zeros that sent him mad could still be hidden as a transient memory just holding on inside a part of the RAM that you have up-to-this-point not made use of? What about if it's just biding its time hiding, waiting for the right moment to come out?
I'm sure I've already used every bit of that RAM over the years. ZFS loves to use all the memory I throw at it. If there's any killer virus hiding in the ones and zeros....I guess I already have it.