4K yo
Nothing says future proofing like a three-year-old GPU using a soon-to-be-replaced-by-DisplayPort 1.3/HDMI 2.0 output that it couldn't use anyway (assuming firmware was offered) without the guarantee that its pixel clock could run reliably at 600MHz (for 60Hz operation).
QFT. That said, cards like this signal that 4Gbit ram is getting ready for primetime, which is a big deal (and I think largely the take-away from this product.)
Now, I don't know if Tonga (iirc my codesnames) for instance will have either of those connectivity options (probably not) but I would be willing to bet it's pixel clock is fixed and there are 8-chip 4GB models from the get-go, regardless of the big push in the rumor mill being 2GB reference (inferring amd wants them to make a big splash for typical 1080p users).
Couple of those cards, at the right price, could be kinda-sorta interesting versus Hawaii, just as 2xPitcairn was to Tahiti, although in the later example 4GB was a very rare sight.
On a side note, glad to see (at least with this sample) 4Gb elpida chips are not as crappy as some of their 2Gb offerings. Perhaps their binning standards changed with new products because of the abilities to differentiate chips for new standards (ie low-power), perhaps the chips themselves are just so new (implied by the price) that higher-leakage parts might flow into lower-end products (as is usually true in the beginning) before they are eventually binned more thoroughly, or maybe just perhaps they were just tired of being crapped on by geeks versus Samsung/Hynix. I'm always glad W1z calls them out in his reviews. Who knows in this case, but if repeated enough times things like that can have an effect on products.
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