I just have a power cord with only ground wire in it and this goes into the PSU and the other end in the wall socket which in the entire house are all grounded.
I keep one hand on the case when I insert or take out a card and I haven't blown any of my own.
I have however blown a videocard in the early days on the pc of one of my friends with static.
He reteurned it and got a new one :roflmao:
On the Amiga the 1084 monitor is one of the main reasons for blowing Amiga's since this is only uses live and neutral and is not grounded.
And when you connect the RGB connector to your Amiga while the monitor is on you can probably see little sparks when it touches the video connector on the Amiga.
Grounding the whole unit this way is the safest for your computer. But you've gotta be 100% sure you are safe yourself. Even having an AC plug with an earth only (to ground your unit for maintenance) has a certain level of risk
