Just got this from videocardz website dated October 31,2013 no author

"Quote"

This is such a hilarious story that I had to post it.

This post will explain to you why delaying the launch of new graphics card is never a good idea. It will also prove that the naming of R9 290 series is quite unfortunate.

Everyone should already be familiar with the Radeon R9 290X. The cut-down version named Radeon R9 290 will be released next week. The problem with this card is that every time you mention it, you should add non-X to the name, just to make things clear so everyone will understand which card you are actually talking about.

A member of OCUK forums — primouf — ordered R9 290X from undisclosed French retailer. Unfortunately for him, and fortunately for us, he received a sample of R9 290 instead, all that because the seller didn’t pay attention to the X.

Of course there wouldn’t be a point of being member of Overclockers UK forums if he didn’t run some tests.

tests here:

http://videocardz.com/47479/someone-got-radeon-r9-290-mistake