this one seems like the old stock/batch.
they are not an old batch except for the gpu chip itself. the pcbs were actually just made this year after sapphire bought off the remaining lots of evergreen chips to sell off for reduced prices. they have no voltage control but are stock overclocked @ 800mhz and typically clock to around 900-950mhz on stock volts
also if you are in canada shipping for any number of units is only 5.99 right now
It sounds like the lack of voltage regulation is a hardware limitation, is that correct? I was actually hoping to undervolt mine slightly for improved efficiency. Would like to know if there is any way to do this.