I too got a WMPW instead of an XPMW from xoxide. I paid $60 for an X and got W. Any, they replied to my email and stated that they knew that they sent a W. THey said it's basically the same, how is WMPW same from XPMW. Those BAS#%$%@#, they don't even have the decency to let us know before they ship the wrong item. Anyway , they are out of stock so I decided to keep the chip. I managed 11*192 = 2111 Mhz at 1.5 V. This is better than my old 0312 TPMW so I think I am going to keep it to avoid the hassle.
I am limited to my a7v333 so I cannot test the max of this chip. For some reason, my system hangs over 2.2 Ghz regardless of vcore voltage. I pass memtest at 2.3 Ghz but windows hangs when using P95 at 2.3 Ghz. I may need a more powerful supply. I am using a sparkle 350W.