GDDR5X GPUs still have issues with compatibility. A 1080 for instance will sometimes get the full 30% speed increase over a 1070, but often times it wont. About half the algos worth mining right now have problems with GDDR5X. You'll get anywhere from 10%-30% (usually around 15%). A 1080ti is no different. It's a shitshow, skein doesn't have problems.
why "half the algo", i only have bad result on ETH and feathercoin, all other algo i'm doing 60-70% more versus a 1070, with my 1080ti and 80-90% on skein/jha
You should be getting +30% compared to a 1070 with a 1080 and +85% compared to a 1070 with a 1080ti according to cuda counts and pricing. If you're getting 60-70% more then a 1070 with a 1080 you have something misconfigured with your 1070 as it's underperforming. A 1080 and 1080ti will underperform compared to a 1070, but not the opposite direction unless you have something setup wrong. GDDR5 is quite mature, algos have problems with GDDR5X.
As far as what algos are having problems, you've quoted someone of them. I'm not going to tell you about them though.
It's a shitshow, skein doesn't have problems.
Why are you talking 'bout skein? )) You were laughing at me when I told you 'bout $10 per gtx1070 some time ago ))
I never said there weren't coins doing that, I was laughing at you being unable to talk about them because you know they'll get hammered if you do. Remember when I mentioned the 277,000 1070s mining Equihash? Yeah. You have to be a pretty big dumbass if you don't realize what that'll do to any coin you mention, completely taking out of context the whole discussion was about how you can mine mainstream coins with AMD and Nvidia is all niche stuff if you want to make any sort money (which gets hammered immediately) and even then AMD still ends up well off ahead with their mainstream coins.
GDDR5X GPUs still have issues with compatibility. A 1080 for instance will sometimes get the full 30% speed increase over a 1070, but often times it wont. About half the algos worth mining right now have problems with GDDR5X. You'll get anywhere from 10%-30% (usually around 15%). A 1080ti is no different. It's a shitshow, skein doesn't have problems.
These are not issues, but "GDDR5
X features"
bandwidth is up, but latency/access for smaller chunks is not, thus algos that do not depend on bandwidth (skein), or can use memory in fully cached chunks scale with cores.
Algos which are critical with latency or non-cached memory access doesn't scale well
What? That's common bogus developer rhetoric. GDDR5X is broken for about half the algos. It needs to be fixed. It's not a feature until it actually does something remotely beneficial. And no it's not a 'oh it's latency and it's broken 4evarrrr' thing, algos need to be tuned to it.