Pontiacg5 they're not locked (at least not the older version) but you can only lower the voltage in sapphire trixx. I have one of the older 6+8 pin and running 730 stable. I can up to 743 but it's not as stable there.

I would  be willing to take 2 of them off your hands since I can't find them anywhere in the greater Toronto area. Payment in BTC, LTC, or paypal as well.