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1  Bitcoin / Mining / S19 Power Requirements on: October 23, 2021, 05:04:38 AM
So I'm planning for a small farm setup to accommodate 25 S19J Pro 100T in the beginning with room to expand up to 50 units in the near future
As per Bitmain, each unit draws about 3000w at 200~240v and the power supply has two inputs.
A 20amp circuit at 240v can handle up to 3,840w at 80% load
A 30amp circuit at 240v can handle up to 5,760w at 80% load
Considering this, is it safe to use 20 amp circuits for each antminer instead of going for 30 amp ? Thanks all
2  Alternate cryptocurrencies / Mining (Altcoins) / Undervolting RX 570 8GB on: February 11, 2018, 05:25:59 PM
Hi everyone,

Being an nvidia miner, yesterday I spent some time installing my first Radeon GPU and trying to optimize it to get the best results and performance

The GPU is an MSI Armor OC 570 8GB, I'm using Windows 10 with latest creator update 1709 and using the latest adrenalin 18.2.1 drivers and a mod bios

Below are the steps I went through with the different results:

1- Stock settings: 17.9 Mh/s
2- With compute mode enabled: 24 mh/s
3- with mod bios: 3̶1̶.̶7̶ 30.7 mh/s
4- Using afterburner: OC memory from 2100 to 2150 and setting -20% power limit :3̶1̶.̶7̶ 30.7 mh/s , power draw as per GPU-Z is 110w

That's the best efficiency I could achieve, tried further lowering the power limit but it resulted in hashrate drop

I did search in the forum for undervolting the gpu but I'm still confused with it, my afterburner has the core voltage grayed out even though I enabled it in the options, watttool doesn't seem to support the RX500 series and not sure if it is possible to undervolt using Polaris

Any ideas how to lower the power consumption below 110w while maintaining the same hashrate ?


3  Alternate cryptocurrencies / Mining (Altcoins) / 9th GPU on ASUS Prime Z270-A Mobo on: January 27, 2018, 12:08:10 AM
Hey guys

Did you have any luck getting a 9th GPU to be detected on the Asus prime Z270-A mobo?

My mobo is currently quite stable running 8 GPU's using one powered M2 adapter, I recently installed another powered M.2 adapter on the second M.2 slot and I can't get the system to detect my 9th GPU

I remember when i installed my first M.2 there was a message after the BIOS screen before Windows loaded indicating that the system detected an M.2 device, when I installed the second M.2 I never had that

I have already configured both M.2 ports on the BIOS for PCI-E use

Any feedback is appreciated
4  Alternate cryptocurrencies / Mining (Altcoins) / 1070/1070 TI Power Limit ETH Mining on: January 01, 2018, 04:10:52 PM
Hi everyone,

So my new rig is almost one month old and I've been mainly mining Equihash, Lyra2Ver2, NIST5 and Xevan

I was able to come up with the best OC settings for each algo after spending some time fine tuning

Today I decided I'd give Ethash a try using Claymore, my rig consists of 6x 1070's and one 1070 TI all Zotac mini, I was surprised to notice that power limit doesn't have any effect on the hashrate

I started my tests at stock settings, then OC'd memory to +750 on the TI and +650 on the 1070's then started lowering power limit from 100% all the way down to 65% by 5% increments and the hashrate wasn't affected at all by all the decreases while my wall power meter was keeping on going down

Is this a normal behavior when mining ETH while all the other algos I tested were being affected by power limit ?

5  Alternate cryptocurrencies / Mining (Altcoins) / Biostar TB250 BIOS Issue on: December 24, 2017, 12:22:00 AM
So I just flashed my TB250 flash to the latest version and now it is booting automatically to the BIOS menu
I can't see any error on the POST screen but not sure what's making it going to BIOS menu and not booting properly
I tried to downgrade to an older BIOS version using the flash update utilty from the BIOS itself, I'm able to select the older version BIOS file, the system shows says the installation was completed but when it reboots it goes again to the BIOS and I can see that it is still on the latest version

Any idea guys ? At this stage I disconnected all my PCI-E risers and I'm using the integrated graphic controller
6  Alternate cryptocurrencies / Mining (Altcoins) / Automating loading Afterburner profiles on: December 06, 2017, 08:34:02 PM
Hi everyone,

Is there a way to load an Afterburner profile using command line?
I'm trying to automate switching my profile on a daily basis as I would like to lower my TDP during on-peak power and put it back to higher TDP during off-peak

7  Alternate cryptocurrencies / Mining (Altcoins) / Building my First Mining Rig on: November 23, 2017, 05:47:52 PM
Hi everyone,

So I spent the last couple of weeks researching all the information related to altcoins mining, what it takes to build a mining rig, etc...
The most difficult decision was what GPU's to go for, I first started considering the AMD 480/570/580 as I can get them for real cheap but the fact that they are only good for a few algos has made me rather looking at nVidia cards
After spending some time reading and watching youtube videos I decided I will go for the a GTX 1070 based mining rig

I'm putting together my shopping list and it's good to see some nice black friday discounts with newegg / canada computers so I need to make my purchase by week-end

The only part where I'm still confused is with the mobo/risers/PSU wiring, so I was initially thinking that a 1000w PSU would be good for a 6x 1070s rig but I realized that the rig will be running very close to 100% of the PSU and that it wasn't recommended so I'm going for 2x 650w instead which is almost half the price of a single 1250w PSU

I understand that there are precautions to take when using dual PSU like using a proper adapter (I'm getting the add2psu adapter), the only thing that is confusing me is how the 6x 1070s will be connected to the PSU, I see conflicting information about the 1070 gpu's as some people indicate they use a single 8 pin connection and others saying the 1070 requires more than one 8 pin connection, can you guys confirm how I should be connecting my 1070s ?

Also the other thing that's confusing me is the powered risers, I've seen many recommendations to stay away from using SATA power cables, if the riser has a molex connector, is it possible to connect it to the PSU using molex to molex cable?

Note that my PSUs will come with 4x PCI-E ports and 4x 6 pin Molex/Sata ports each


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