Well it works, got my hynix cards up-to 28.3MH ETH and my samsung cards up-to 31.5MH Eth all 4GB powercolor cards.
Also to all the people making tools for us here it would be nice to have donation addresses so that we can send you some tips.
Are you using the 1500 strap for hynix and 1750 for samsung? and what mem clocks did you use to get those (specifically the samsung)?
For me I use the above straps and clock hynix at 1900-1925 (1950 if its stable) and 2050-2100 for samsung (although Im wondering if i can go higher than 2100 on some samsung chips)
Try the 1625 strap for Hynix. On my Strix, 1500 was stable up to 1900, while the 1625 strap is rock solid at 2025.