Topic: When setting GPU Core and Memory voltage is it considered Max voltage or Exact - page 2. (Read 382 times)

Sadly, that is the right thing to do.

Thank you for all the info guys.

I am using MSI Armor OC RX580 Cards with Micron memory.


7 of 8 cards have been running fine on the following OC settings:

1150mhZ / 850w
2150mhZ / 850w

Each card runs at about 80w, rig total is 1060w

The one card is giving me problems, I even lowed it to 2100mhZ / 850w and still giving me the red error.

As Piskeante is saying I think if I feed it a small amount of additional voltage the errors will go away.

Additionally, Piskeante there is absolutely no way gpu mining would be even the smallest amount profitable running at those high voltages you are talking about. If my wattage goes anything higher then it is the profits get destroyed. I have seen plenty of posts out there saying 850w is a common wattage for RX580s and it has been working for me just fine, besides this one card, so I am asking how you guys recommend I go about tweaking it. I do think adding a small amount for voltage will do the trick, I am going to try that now.

I always set core and mem voltage at the same value. If not, the higher voltage is applied on both.
And always starting at 900 and then adjusting per card.

The truth about "memory undervolt" is a myth,  people only undervolt the memory because claymore used or still use memory voltage linked to core voltage, so if you dont undervolt the memory, your core clock will be like the memory voltage and that means furnace will hit your house ehhe, as long as few software use the memory to be linked to core voltage then people will always think memory voltage is undervolted which is not true, setting your memory to 1.0v or 0.8v  or 1.2v will not have any effect at all in the memory itself. So the truth is memory undervolt or overvolt is useless on polaris. The right approach supposed to be the use of only -cvddc.

there is a very spreaded fact that says that memory can work undervolted. My experience is that THAT DOES NOT WORK AT ALL.

To begin with, every card that i've seen is 1000mv stock on the memory (2000mhz on 580's , 1750mhz on 570's), so 850mv is an undervolt that can cause mem to not have enough power supply and crash. Moreover, this is going to happen if you overclock your memory.

So i bet if you leave it stock to 1000mv you will see less or nearly no errors.

You haven't told us your card,  asic quality, memory brand , etc, so not much i can tell you with this info, just what i said.

1150mhz for 850mv on the core, is also low. Most RX 580's will need around 887mv to work without issues though 850mv is possible for the core. I had like 6 of them around that voltage on the core (from 850-887mv). If the miner crashes, and reinitalises is a core that's too much undervolted. If you get too much errors , or your hash rate is low, or you get incorrect shares, that's normally mem issues.

go for 1150mhz on the core at 887mv
go for 2150mhz on mem with 1000mv

If with this parameters, you still get errors using HWinfo64 (or 32), this means your mem should go underclock. Then try 2125mhz and see. You must stay near 0. some errors, (small amount, can be accepted, less than 100 every hour). if it continues with errors , then 2100. This should be ok. all of my 12 cards could do at least 2100.

Normally, with micron mem you will probably do 2250mhz (all of my micron could do it, best mem for AMD). Hynix is tricky. Some will , and some will not get there. Samsung memory is really bad on AMD cards (the best on nvidia BTW).

i used custom bios + MSI afterburner to apply undervolt.

This is not voltage, your memory chip can't stand 2150 for a long time without errors, increasing memory voltage will not help that, you must reduce memory clock and those errors will stop, memory is like core, lottery based if you are lucky.

Another way to help with that is making sure memory modules are not overheating, some graphics cards have memory cooling linked to core cooling, so setting fans at greater rpm speed will help with cooling the memory modules, try it, it might work for you.

I am trying to understand when using overdriveNT tool on Windows 10 when setting the voltage of GPU Core and Memory does it mean Max voltage or the exact voltage that will consistently be sent to the card.

In Claymore I am currently getting this message for one of my GPUs:

GPU #2 got incorrect share. If you see this warning often, make sure you did not overclock it too much!

GPU: 1150 / 850
Memory: 2150 / 850

Could increasing the voltage for this card fix this warning that I am getting? Or is it strictly to do with Memory mhZ or is it both?

Should I start by taking the Memory down to 2145 / 850?

Is there a scenario where increasing the GPU speed could help prevent memory warnings at 2150mhz? Or is it strictly lowering values from this point forward for that card.