I set the VDDC to .950 or 1.000 or whatever then within a few hours, usually much less, something is resetting it back to stock level without me even touching anything.   I'm using Wattman currently and maybe that is doing it somehow but I don't understand why.   This also happens it I restart the mining software so it seems like it has something to do with changing of the GPU state level but I've set all of the voltages to the same value.  I really need to solve this as there is 30-35 Watt difference per card.

Is there any utility that I can schedule to run on a timed basis that would allow me to set the VDDC?  Or anyone have links to code to do that that I could roll my own utility?  I would just set Claymore to restart once per hour or something but unfortunately it won't set VDDC for RX 5xx series cards.

Yes Sia seems to consistently be the most profitable second coin.  However I've determined that for me the extra wear and tear and heat on the cards and extra electricity and extra 1% fee doesn't justify it.  By my calculations whatever extra I earned I was losing to increased electric cost.  So why stress your cards just to break even?

Been using MPH for awhile now, I love the ability to exchange between coins so easily.  I'm not aware of any other pools that allow you to do this, are there any?

40 hours and not a single confirmation yet.

My last payment from Nice Hash is going on two days without a single confirmation.   This is BS.

Since I can't use Afterburner with my AMD cards and I can't set vddc from Claymore's command line I'm forced to use Wattman but after rebooting settings go back to default.

Just to verify, -cvddc is not supported for RX 5xx in Windows?

- Why Ethereum hashrate in Dual mode is higher than in Single mode?
  Hardware feature, accept it as an extra bonus.

Magic hardware!   

Finally made some progress.  On the XFX card using Anorak's overclock BIOS I am up to 27.7 Mh/s ETH-only using a 2100 memory clock. I'd like to hit 29 but I'll take almost 28 over 23!  And of course Afterburner STILL is not letting me control anything but the fans on the RX cards.

I'll have to dissect that BIOS and see what the changes are and try to get the Sapphire card going now.


EDIT:  Had two blue screens with my initial settings.  Now using 1200/2000 clocks, .9125V and getting 26.1 Mh/s, 52C and only using 70 Watts!   That's pretty amazing after reading all the stories about 5xx series being power hogs.   Hope it's stable over time.  I don't think it's worth trying to push 27 or 28 considering the increase in power.  I also am coming to the conclusion that dual mining SC may not be worth it either between the increased power, heat, and 1% extra dev fee.

Is it possible to improve hashrates at all on RX cards by OCing the stock BIOS or do you HAVE to use modified memory timings to get any boost at all?

I didn't make this transaction, this was a payout from Nice Hash.

It's now been over 24 hours.  I just checked the block again and it says it was received 26 minutes ago??

https://live.blockcypher.com/btc/tx/ee16b2978947cb2a6d3c27510feba7c0a9601c3491b91caedb8b5fd7be525100/

So what's the longest amount of time anyone has seen a block take to confirm?

Sapphire RX 570 NITRO 4GB Hynix
XFX RX 570 4GB Elpida

Stock settings and BIOS I get 23.x Mh/s on ETH only and 21.x/640ish ETH/SC.  I've tried Anorak's BIOSes as well as setting the straps through Polaris and OCing using Wattman and at least 3 different AMD drivers.  Nothing works, I see no change at all.  I am running out of ideas.  Tomorrow I will move one of the cards to another computer just to see what happens.  If I'm doing something wrong I have no idea what it could be.

I'll believe it when it happens.

26 is still better than what I'm getting.  I now have two 570s, Sapphire and XFX and both can't get over 23.x ETH-only.  Doesn't matter what BIOS changes I make or what clocks I use.  In fact if anything messing with things actually creates worse hashrates and thrashing of hashrates!

I won't be buying any more RX cards until I can figure this out, and even then I may not until AMD can fix the DAG efficiency drop time bomb.  I ran the -benchmark option in Claymore for my RX 570 and GTX 1070 (dates are estimated of course):

8/17/2017  EPOCH 140: ETH: GPU0 23.807 Mh/s, GPU1 31.197 Mh/s
10/1/2017  EPOCH 150: ETH: GPU0 22.501 Mh/s, GPU1 31.164 Mh/s
11/14/2017 EPOCH 160: ETH: GPU0 20.258 Mh/s, GPU1 30.621 Mh/s
12/29/2017 EPOCH 170: ETH: GPU0 18.232 Mh/s, GPU1 31.195 Mh/s
2/12/2018  EPOCH 180: ETH: GPU0 16.754 Mh/s, GPU1 31.135 Mh/s

In five months or so the RX cards will lose another 30% performance.  Of course ETH PoS may change everything anyway before then.  If 1070s drop to $300 or even close that will be my card of choice, hands down.

I thought that tx free looked pretty low.  This Bitcoin was sent to me by Nice Hash.

My received Bitcoin's block is 14 hours old and there are zero confirmations.   Is this typical of what is going on right now?

https://live.blockcypher.com/btc/tx/ee16b2978947cb2a6d3c27510feba7c0a9601c3491b91caedb8b5fd7be525100/

I have a 570 Hynix and I can't get above 23.x!  This Hynix memory is crap.

Sapphire PULSE RX 570 4GB Hynix

The only thing I can control in Afterburner is the fan speed.  The core and memory clock sliders are greyed out and are set to zero.  I can slide them to other values but when I click apply they reset to zero.  The other sliders (power limit, temp limit, core voltage) cannot be used.

This happens whether or not Wattman is installed.  What could the problem possibly be?  I've tried the current AMD driver 17.7.4 as well as older versions and Afterburner 4.3 and 4.4 beta.

I should note that TRIXX is not working right either so it's not an Afterburner problem per se.  I just don't know what the deal is here.

I will rollback the driver but I'm not too worried about Afterburner, using Wattman for now.

I used the Anorek 1500 memshift BIOS and am getting 22.5 Mh/s, 620 Mh/s dual ETH/SC but that's the best I can do.  I can change mem clock using Wattman and I see absolutely no change in hash rate either up or down.  I verify that the clock actually changed via both Wattman and GPU-Z.  That doesn't make sense, I have no idea what the problem is or if this card is just incapable of getting any more out of it than that.

Again, it's a Sapphire RX 570 PULSE 4GB Hynix.  This is my first AMD card and I have an XFX RX 570 on the way so I hopefully that one goes a lot easier.

EDIT:  Did a clean driver uninstall and tried both 17.7.2 and 17.7.4 (driver only)and Afterburner just will not work on the AMD card (works fine on two Nvidia cards).  I can control the fan just fine but the clock sliders are greyed out and are sitting at zero.  I can change them but when I click the apply they go back to zero.   So frustrating.  I've had more trouble with AMD cards.  Nvidia cards just work.

ETH seems to be the technologically superior coin from my limited knowledge of the subject.  I think it has a good future.

I am amazed whenever I transfer ETH, it's so damn fast compared to BTC.  The transfer shows up in minutes and is confirmed very quickly.  I am waiting hours for BTC to do the same.