5600XT 39.5mhs@74w gpu-z, 135w total rig at the wall power Gold PSU, 40w total rig power idle, so roughly total 100w for the GPU. 2.53 watts/hash. VS Polaris closer to 4w/mhs. 50-60% improvement in efficiency easy. I call that a win. Now price per mhs thats another story...Honestly can't wait to see what the 80cu Navi RDNA2 will look like, i.e. "big navi".
radeon VII can do 100mhs, big navi should do more than that.
lol at nvidia 3080 at 10gb and 3090 at 24gb and no 16gb middle ground hehe, if 3090 can't do 100mhs or more maybe big navi will be my next upgrade.
IMO, i doubt big navi will top 100mhz on ETH, unless they are going to be using the higher bandwidth GDDR6x, which i have not been able to find confirmation of. (I know that NVidia Ampere are using 6x) If it's just more GDDR6, I don't see these achieving 100 or more... maybe more in the 80-85 range, but even that could be good, depending on price.