So usually I hate ranting, but man I gotta get this off my chest. I HATED the controller mission, I killed maybe a dozen or so PMCs after I thought I stunned them but the grenade bounced this way or that.
From where I'm standing, this mission doesn't feel skill-based at all. Purely luck whether or not the PMC stares at the grenade when it goes off.
And in order to ruin this mission (in the hopes it gets changed) here's the tactic I came up with (which worked almost instantly):
Put a few stun grenades in your gamma, hatchet reserve, run to the room with graphics cards, toss in a grenade, and then hatchet the looter in there.
Legit, after killing 12-15 PMCs and not getting this quest done, I tried this tactic on Reserve only twice (!) and finished the quest. Easy. And I got a tetriz and PSU out of it too!