Yeah, just the "X" implies either "10" or "what?" to me. Another letter wouldn't have hurt, having an XL and LE or something easy to distinguish performance by.
I think Unwinder might go after them if they tried that, and I'd be rooting for him!
a little ati (pre-amd) history lession (how i remember it)
LE = means slow
XL =means a little faster than slow
PRO = means faster
XT = even faster
XTX unholy fast