Sure it's not STOCK. This card default run at ~23.x Mh/s. For 28.x Mh/s you have to modify the BIOS as I mentioned above.
For your concern about part/build quality I have to say : Slightly yes.
I got my hand on 2 mining cards : ASUS MINING-RX470-4GB (Hynix) and ZOTAC P106-100-6GB (Samsung) and they both "look cheaper" than normal gaming card.
BUT they ran flawlessly for over past 3 months like my other rigs ( gaming card ) so ...maybe just "look cheaper"
PWC is a good choice, many of my friends choose PWC and run at 30 Mh/s (Samsung)
Thank you for that, please can you educate me regarding the PWC abbreviation.
Then, would you recommend or suggest i rather get a PowerColor RX470 Red Dragon or PowerColor RX470 Red Devil (they both 4GB) and i have to specify with no bios mod, the PowerColor RX470 i have with Samsung , runs at 23.3 MH/s at EPOCH 144. Or do i get the Asus Mining card instead.
I am just not sure. They are priced the same here, BUT the PowerColors i can get are Recertified with 9 Months warranty on the Red Devil 470 and a bit more on the Red Dragon RX480
As far as i know they are both 8 pin connectors... and they run well on Power too never exceeding 120 Watt.