Or possibly it was 2 models? A Tri-X and a Tri-X OC.
The reason for all of the changes on TPU was the original specs were rumored/guesses before release.
(That link was for you to read the list on the bottom.)
That's how Sapphire does their de-rating.
It's similar to how MSI does it as well with their Lightning series.
Sapphire did the same thing with their 280x Toxic and their 7970 series'
etc. etc. etc.
This is common knowledge for all AMD/ATi AIBs.
I shouldn't have to repeat this every single time we have this discussion with the AMD peanut gallery.
XFX already de-rated their VRMs on their R9 290 DD (R9-290A-EDFD).
Learned that the hard way when I had to RMA the reference 290 that melted from the XFX PSU.
The first replacement they sent me was the R9-290A-EDFD and the VRM blew the first few days.
I took the second replacement apart and the VRMs are changed from reference, maybe the inductors as well (I'd have to look that one up).
Also this is my last response to your deliberately crafted rhetorical questions designed to spread FUD against me in such a way so that when I reply to you I get banned for either responding to your lies by calling them lies or I get banned for being "Off Topic."