bum_jcrules :
Some are calling it that. It is still an XT but with GDDR4. I posted a link to Falcon Northwest as the owner Kelt Reeves posted an article regarding two systems he sent into PCMag for review. The one was a SLI 8800 Ultra and the other was CrossFire HD 2900 XT GDDR4. The CPU in the CrossFire system was clocked lower and it still beat the Ultra machine. He has called them XTX cards as well.
Yeah I think some people just think that the 1GB of RAM = XTX, but really as you know of course, the clockspeeds aren't up to the XTX's numbers, so it's not quite the same.
the PCMag review talked about the HD2900XT throughout almost the whole review, but out of the two times the card appeared in the graphs/table it had one of each the HD2900XT and one HD2900XTX. I think for them the later was a brain-fart typo.
Now those that are contrasting an XTX with an XT 1GB, are either overclocking the XT1GB to rumoured XTX spec speed (can't finalize them I guess if they don't officially exist
), and then some others are benching the few early OEM boards like the one review above which has 2 XTXs, but they're with pre-release drivers, and they mentions the drivers are a hodgepodge, so I wouldn't say the XTXs would even perform like that now with all the improvement with AMD's drivers.
I think it's all semantics, but it's good for people to know the difference of course.