I have an XFX RS XXX RX570 with 4G Elpida Memory.  No matter what I do, I can't get over 27.8 MH in Claymore 10.2.  I was able to get my Sapphire Nitro+ RX 570 8G Hynix Memory cards to give me 31.4 HM running at .875mV at the core and memory.  

Is this card just junk for mining or am I missing something?

Overclocking the core makes no difference between 1075 and 1210 other than power so I have it set at the slowest speed possible.
It has EDW4032BAB for Memory.  I can't seem to get it to clock higher than 1950.

This is the timing strap I am currently using at 1750 and 2000

777000000000000022AA1C00315A5B36A0550F15B68C1506004082007C041420CA8980A9020004C 01712262B612B3715

I'm willing to pay if someone can help me.

Thanks.