I received two out of the four X-1's I ordered and the first one i plugged in sent a shower of sparks everywhere, so far the 2nd unit hashes anywhere from 9 to 90 Ghz regardless of what the Freq is set to, the errors do seem to drop a bit if it's set to 1000 or below.. Your mileage may vary 
So that's the second power supply we know to have gone bang. How many more, I wonder?Funny how the image showing the PSU manufacturer label seems to have "disappeared". Fortunately Firefox's search history comes up trumps, I originally tried finding a "Sunshine AP187" back when the picture was posted. Here's what AliBaba has to say about it.
http://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&CatId=&SearchText=ap187+power+supply
Perhaps that's Black Arrow's "surprise"...
http://s18.postimg.org/ak2i9ognd/Way_Of_The_Exploding_PSU.jpg
Nice find. Looks like it's the same manufacturer for the x3 psus: http://m.alibaba.com/product/1936290059/Hot_selling_1430W_dual_output_5V.html
No surprise BA would charge twice what the manufacturer is asking.