RAM type: ECC UDIMM or non-ECC best?

[code9n]

How important for hashcat is memory type?  Is it best to go for faster non-ECC memory or slightly slower ECC unbuffered?

And if you get 1 bit of memory flipping when trying to crack, say, a single WPA2 hash would that just effect one try, one attempt at a guess, or all attempts from there on?

thanks,