Hi All!

I got one modded BIOS for my "Asus ROG STRIX RX 580 O8G GAMING" card (I saved my BIOS, uploaded to a website and got one back from a modder). BUT without checking what exactly he had modified, I doesn't want to flash it, so I compared with SRBPolaris V3 my stock BIOS version with the modded one.

This is what he has done:

- copied the memory timing of 1750 into 2000 strap
- changed the GPU default frequency from 1360Mhz to 1088Mhz
- changed the Memory default frequency from 2000MHz to 2140Mhz
- changed the Max Power limit from 180W to 160W in PowerTune
- changed the TDP from 145W to 122W in PowerTune
- changed the TDC from 149A to 126A

What do you guys think? Is this so OK if I want a little bit more hashrate and less power draw, with stable long term mining?

Thx a lot

Right now, I have 5x rx580 and I make 0.7ETH per month. Because I dual-mine with Decred, I also make 2 DCR every month at the cost of more electricity. Because yours is cheap, try to dual-mine ETH with decred using claymore's dual-miner.
As an alternative, you can try to mine other coins. For example, at the time of this post, ethereum classic or monero can give you a better profit than ethereum.

Check https://whattomine.com/

You will need to do some bios modding on those gpu's.

ETH mining is heavly VRAM intensive. That means that you need to overclock the gpu memory as high as possible and use custom timings. In order to decrease power consuption, you should also underclock and undervolt the GPU core speed.

With 4 gpu's you should have something near 120MHs

Check the last pages of this topic https://bitcointalk.org/index.php?topic=1758267.0 and also search the forum for more on this subject

Unfortunately I can't assist with EthOS as i have never used it. Try Simplemining.net maybe to test that? otherwise Win 10 Build 1704 to see if hardware is connected and working properly

This is tricky

yes, if you have 6-Pin risers then you can power it with a 6-pin directly from the PSU. 6-pin risers are the best quality for risers. Better than molex or Sata risers.

Running 2 risers on one cable is ok, as I am currently doing it for 2 months without problems. PCI slots usually provide about 75W to a cards, rest of power is taken from the 6/8pin plugs to the cards.

Depending on what cards your are using and if you are undervolting to limit power, you can run 2 cards on one cable (2 x 6/8 pin). I do this with my GTX 1060's running 2 cards on one cable 2x 6 pin basically daisy chained.
With lower power usage you can do this.
With cards drawing more power i would only run one cable from PSU per card, as you don't want to overload a rail. That 6/8 pin cable can only provide so many Amps, so even when you are staying under the PSU recommended wattage, it is possible to overload that cable if the cards draw too much power. In your case without initial knowledge of undervolting, rather run one cable per card. don't put 2 cards on one cable.

I can tell you that it does work on GTX1060's drawing 85W undervolted from my Corsair 1000W PSU with one cable supplying 2 cards. I also power 2 Risers per PSU cable via SATA with no problems. running 2 months like that now. No more than 2 risers per cable though! if you can and have the cables do one riser per cable for safety. specially if you have cards drawing more power and you are not undervolting!

Currently ETH is more profitable than ZEC.

I have a 3GB 1060 with crappy memory that only gets 18.5MH/s so the same card can do 300Sols/s on ZEC with GPU clock and power tweaking. So in that case ZEC is better.

Generally with other 1060's ETH is more profitable if you get 23/24MH/s.

ETH price is really doing well now, with Metropolis coming soon the price is expected to rise even more, so i would stick to ETH for now if i was you.
Metropolis is going to address the difficulty bomb, so difficulty will be predicated again to Network hashrate and block reward will reduce slightly.
So Ice age is being pushed back and mining for ETH should be good for some time to come.

Best bet, those cards stock can draw 140-150W without undervolting or even more. My RX 580 GB i have at 100W with undervolting running 30.5MH/s though.

This is tricky

yes, if you have 6-Pin risers then you can power it with a 6-pin directly from the PSU. 6-pin risers are the best quality for risers. Better than molex or Sata risers.

Running 2 risers on one cable is ok, as I am currently doing it for 2 months without problems. PCI slots usually provide about 75W to a cards, rest of power is taken from the 6/8pin plugs to the cards.

Depending on what cards your are using and if you are undervolting to limit power, you can run 2 cards on one cable (2 x 6/8 pin). I do this with my GTX 1060's running 2 cards on one cable 2x 6 pin basically daisy chained.
With lower power usage you can do this.
With cards drawing more power i would only run one cable from PSU per card, as you don't want to overload a rail. That 6/8 pin cable can only provide so many Amps, so even when you are staying under the PSU recommended wattage, it is possible to overload that cable if the cards draw too much power. In your case without initial knowledge of undervolting, rather run one cable per card. don't put 2 cards on one cable.

I can tell you that it does work on GTX1060's drawing 85W undervolted from my Corsair 1000W PSU with one cable supplying 2 cards. I also power 2 Risers per PSU cable via SATA with no problems. running 2 months like that now. No more than 2 risers per cable though! if you can and have the cables do one riser per cable for safety. specially if you have cards drawing more power and you are not undervolting!

Some motherboards want you to use the primary x16 slot (the physical x16 slot closest to the CPU) for video, others are better at auto-detecting.

Connect one card to the primary x16 slot using a riser. (An x1 riser can work in a physical x16 slot just fine. There are x16 to x16 ribbon risers, if that suits you better for any reason.) Connect this card to your monitor. (Alternatively, you could install one card directly, and just skip the x1 slot directly beneath it, since you only have 4 cards for right now.)

If you are using POWERED risers, then you should not need to use the supplementary 4-pin molex connections on the motherboard.
However, you must also use the 8 pin PCIe power connectors on each of your cards, regardless of your riser situation.


I would personally avoid the 1x SATA to 1x 6-pin PCIe adapters for a rig like this, but it's up to you. Some people have used them fine, others have had problems. I've personally used such an adapter for a 7770 that has worked without issue for years. However, the 7770 is a low-power card.

SATA connectors are not rated for the same current that PCIe or molex connectors can handle, and running things 24/7 far over-spec is generally a bad idea. I'm bringing this up since I notice in one of your images (https://ibb.co/hC9rcQ) that you have one riser powered with a SATA to 6-pin adapter, and another SATA connector on the same line from the PSU is also connected to a similar adapter. I hope you're not planning on powering two risers with that one line of SATA cables. 2x molex to 1x 6 pin adapters are usually a better bet.

(As always, nobody here is responsible if you accept our advice and dislike the results.)

Yep the 1x riser into the 16x slot.
You can disable onboard graphics and plug monitor into the graphics card connected to the 16x slot.
you can mine with however many PCIe slots you have 16x and 1x.
Just monitor power draw on the PSU!

Looked at the pic again, I only see 1 x 16 and 5 x 1 PCI Slots?

https://ibb.co/kOV045
Move the USB cable with the little riser card one position left into the long 16x slot next to it.

I can't see the image very clearly but it looks like you are not plugging anything into the 16X PCI-E slot.
Plug the the first card into the 16x slot using a 1x riser (It fits) just doesn't use all the space on the slot.

A PC generally looks for a graphics card on the 16x slot at boot to output to the monitor. You can disable onboard graphics/audio/com ports and all unnecessary devices in BIOS.
The cards must be powered as well as the Risers. The card will draw power from the Riser and the 6/8 pin power cables connected to it.

I could be wrong but the power to the MB near the PCI-e slots is not necessary when using powered risers. I think they are there if you use risers that are not powered.
I know on the Biostar TB-250 you dont have to plug in the molex power cables if you have powered risers.