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1  Alternate cryptocurrencies / Mining (Altcoins) / Re: [Cast XMR] high speed XMR/CryptoNight miner for RX Vega GPUs (2 KHash/s) on: November 05, 2017, 08:45:00 PM
I have an issue when comparing hash rates reported from cast-xmr and the hashrates I see at the pool (supportxmr).


My benchmark rig is made of 4xVega56 flashed to 64 cards.

The hashrates for the rig shown by cast-xmr are 7870h/s, constant (i.e. no drops or anything). It's very stable within 40h/s.

However, the real hash rate reported by the pool (supportxmr) are lower than expected. I get 7250h/s. This is about 7.8% lower than reported by cast.

If we take into account:

-) 1.5% dev fee: 118,05 h/s
-) Rejected errors from old jobs (2%): 155 h/s

The total is 273h/s or 3.4%

I'm missing a total of 620H/s (7.8%!). That is another 347h/s  4.4% and is a relevant number.

I have no errors or disconnects. I've been chatting with the maintainers of supportxmr and they sustain that the 24hr period shall fall within 0.1-0.2% of the expected hash rate but mostly never beyond 1%. We're talking 4.4% here.

I'd like to ask if anybody is experiencing something similar, or do your real hash rates (from pools) actually match the reported cast-xmr rates?

thanks.

Hi, many thanks for your feeback. I see similar issues with a 5% unexplained loss of hashes on 3x4 vega 56 rigs. I am currently with supportxmr and will keep for the next week to see how it goes and then I will consider switching pool to understand better where this could come from.
2  Alternate cryptocurrencies / Mining (Altcoins) / Re: [Cast XMR] high speed XMR/CryptoNight miner for RX Vega GPUs (2 KHash/s) on: November 02, 2017, 12:48:20 PM
Has someone been able to use it with 5-6 gpus? for me it ends up crashing after a few min/secs
3  Alternate cryptocurrencies / Mining (Altcoins) / Re: Gateless Gate: zawawa's open-source ZEC/ETH/XMR/PASC miner (256 S/s on RX 480) on: September 23, 2017, 05:52:02 PM
Hi, Would you know where I can get information on how to read all the interface data. I see two hashrates close to each other, a HW, a WU... is there some more info somewhere?? many tks
4  Alternate cryptocurrencies / Mining (Altcoins) / Re: Splitting the PCI 6PIN/Molex power lines? on: September 14, 2017, 06:30:34 PM
Hello guys, many thanks for all these answers. I have identified an interesting psu with 2 pci 8 pin that I will split + 2 molex that I will turn into 6PIN. This should work.
Regarding what I intend to mine, I will go for xmr for which the 2gb wont make much a difference.
5  Alternate cryptocurrencies / Mining (Altcoins) / Re: Splitting the PCI 6PIN/Molex power lines? on: September 13, 2017, 06:53:54 PM
Thank you very much for your input.
I have bought 2 for my tests, they do draw 40W (slightly less if you really target a low consumption) at the wall, modded, underclocked...
Regarding the riser, I am not sure at the moment. I think I will do molex like the ones I am using on my current rig. The problem is that it will raise the same issue. No PSU has 6 molex...so might try a combo of molex and sata..
6  Alternate cryptocurrencies / Mining (Altcoins) / Splitting the PCI 6PIN/Molex power lines? on: September 12, 2017, 07:17:47 PM
Hi,

I have the project to build a second mining rig. For this one I would like to use 12 RX560 with 2 GB of memory.
I was hoping to find some help and answers to a few questions I have.

For the motherboard I was planning to use the Asrock H110 Pro BTC+, I think there shouldn't be much issues to get the GPU work in Linux.
The main concern I am facing at the moment is how to power the thing. @40W/gpu, 800-1200W would be largely sufficient. I was thinking about connecting 2*600W PSU.
The problem will still be to get enough PCI 6 PIN power lines. I do not know any power supply in this range providing more than 2-3 lines. I saw there was some splitters, do you think that could do the trick? Even If I split one line into 4 others, the power draw would still be quite low into theory (<200W)? Would that work?

Similarly, would you see any issue with splitting the MOLEX?
I am very open to any other suggestions you may have.

Many thanks for your inputs,

Bolchevickos.
7  Alternate cryptocurrencies / Mining (Altcoins) / Re: MSI Z170A GAMING M5 - 7 GPU [SOLVED] on: May 01, 2017, 11:34:25 AM
thanks talat .         u seem like from middle east ..     me too .. I,m for Egypt ..

but tell me ?   is there is a Celeron Skylake ?     or its I series only ?  i3 i5  i7 ?
will sky lake dual core work ?
Intel Pentium G4400 Skylake Dual-Core 3.3GHz LGA 1151   ??

can u tell me which processor u were using first ?  I don,t want to fall into the same problem

i tried with i3 6500 but gonna try with G4400 in few days. I ordered today
I will tell you if it works

awaiting your feed back ....   who knows I might give my feed back first ...  we already have the board but GPUz isn't, available yet .

I am waiting for the Intel Celeron G3900 Skylake in the mail. Should be able to get everything up and running to see how it goes.


Morning everyone,
I am highly interested in building my first rig around this mb with 7 rx 480. I was also planning on using the G3900 so please let me know how it goes. Quick question for you guys: would 1000W be enough?

1000w should be enough if you mess with voltage/efficiency...I'd suggest a secondary PSU or a 1300w one though

The 480's don't appear to have the same card limitation as the 470's do...but you might have to mess with voltage to get it perfect.

I'm making a mixed build on this mobo as well as using the g4400, I'll report back once it's functional.

Many thanks for your feedback. Actually for the same price I can get 2*650W with better efficiency so it would definitely make sense to go for 3 + mobo one one and the 4 left and the second one.
8  Alternate cryptocurrencies / Mining (Altcoins) / Re: MSI Z170A GAMING M5 - 7 GPU [SOLVED] on: May 01, 2017, 10:51:24 AM
thanks talat .         u seem like from middle east ..     me too .. I,m for Egypt ..

but tell me ?   is there is a Celeron Skylake ?     or its I series only ?  i3 i5  i7 ?
will sky lake dual core work ?
Intel Pentium G4400 Skylake Dual-Core 3.3GHz LGA 1151   ??

can u tell me which processor u were using first ?  I don,t want to fall into the same problem

i tried with i3 6500 but gonna try with G4400 in few days. I ordered today
I will tell you if it works

awaiting your feed back ....   who knows I might give my feed back first ...  we already have the board but GPUz isn't, available yet .

I am waiting for the Intel Celeron G3900 Skylake in the mail. Should be able to get everything up and running to see how it goes.


Morning everyone,
I am highly interested in building my first rig around this mb with 7 rx 480. I was also planning on using the G3900 so please let me know how it goes. Quick question for you guys: would 1000W be enough?
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