Quote from: doktor83 on May 14, 2018, 07:35:14 PM

Quote from: wgestickley on May 14, 2018, 04:36:12 PM

Doc, I can confirm, that my RX580 cards with 8GB get a Hashrate drop after Pool switch / dev Pool. After start and close GPU-Z while miner is running, the max. Hashrate come back again.

Would be nice to implement the Magic Function to the Miner :-)

Greetings from Germany
Oliver

Hashrate shouldn't drop after devfee mining, because when switching do devfee pool, user pool is not disconnected, it's running in the background, and when devfee finishes it just takes work from user pool and continues hashing. User pool can lower difficulty because user is not sending shares for 1 minute, but i don't believe that should be a reason for the hashrate to drop.

Also it would be nice to know what is gpuz doing

I will go through logs sometime but devfee switch does not seem to cause trouble with the hashrate, and on my end, keeping GPU-Z turned on keeps everything at full speed. Having said that, manual switch shoots down the hashrate a lot. Just having GPU-Z open fixes that too in a few minutes.

I wonder why you cannot see the effect, maybe you are running a special debug version doing extra calls or something?

Quote from: istr on May 14, 2018, 04:59:32 PM

Hello guys,

In heavy algorithm I use 1300 mhz core and depending on memory type (Samsung, Micron...) some cards work on 2000 mhz and some others on 2150 - 2200.
What do you suggest for voltages on both core and memory?
Right now I use core 975 mv and mem 1000 mv. Is it good or I can lower it a little more to save energy?
Cards are RX 580 8gb.

Thanks in advance!

Istr, what is your hashrate per rx580 card?

I do 1160mhz coreclock + 2220mhz on my microns, 880mV vcore and vmem., I get 1010 mh/s, using polaris 1 click timings
I do 1160mhz coreclock + 2100mhz on one of my hynix, 900 mV vcore and vmem, with a custom timing strap, and get 1005mh/s,
I do 1160mhz coreclock + 2190mhz on my other hynix, 900 mV vcore and vmem, with polaris 1 click timings, and get 950mh/s

I think, you cannot set vcore to be less than vmem, so your cores are effectively running at 1000mV.

I must say though, my hynix that does 1005 is not very stable, it does crash every once in a while, and it is the one with hashing errors, although no memory errors are reported. Some of my microns report mem errors but they never procuded bad hashes. That hynix one was bad from the beginning, but the custom ram timings saved a lot of performance and reduced the errors to acceptable levels.

I can't flash the other hynix as it's index is too high and I have to shutdown mining and disable some gpu's to reach it with ATI flash.