It simply doesn't exist; I highly doubt that the boards would use spread spectrum modulation, as its intent is to make the clocking 'wobble', and, at the speeds supported these days, would result in a major source of system instability...
It simply doesn't exist; I highly doubt that the boards would use spread spectrum modulation, as its intent is to make the clocking 'wobble', and, at the speeds supported these days, would result in a major source of system instability...