The only rumor I have heard that gets me down is that they might still be GCN based which is bad
Yup, that's correct. NAVI would be the last AMD GPU to be based on the
GCN architecture though (refined). In 2021 we might see a completely new arch, rumored as
ARCTURUS, (most probably on
VLIW2, or as AMD calls it
SUPER-SIMD). This is where things might change for AMD.
On some other off topic note:
I'm still sort of skeptical about NAVI though. The
Radeon VII wasn't a very worthy contender either, at least in my opinion. It looks like AMD really wanted to compete with NVidia's RTX 2080, but didn't have much choice apart from re-branding and releasing a
cut-down variant of their current
MI50 Instinct compute card. Seems like a desperate move from AMD.
This R7 wasn't meant to be an actual gaming card to begin with, because AMD had plans to target the compute/HPC segment as well. They didn't have much choice either, so they just made some changes to the existing GCN architecture on a refined process Node though, giving us this R7 GPU.
This is also evident from the
FP64 performance of this R7 GPU, which sits around (
3.5 TFLOPs). AMD had a change of heart, deciding that their Radeon VII users deserved a little more FP64 performance from their new gaming flagship, making the GPU more appealing to
professional users as well, while maintaining the performance advantages of their Radeon Instinct lineup.
But for gaming FP64 is irrelevant though. The inclusion of 4 existing
HBM2 memory stacks also actually made this card to be priced in a higher bracket, as compared to the Vega 64 and similar cards. I hope is far betetr than all this.