More like ~39 MH/s at 170W is the benchmarks I've seen. The original $400 price is a fantasy at this point. If you could get RX 570's for their original price, with two you would get ~56 MH/s for less than $400.

Covering your ongoing costs is obviously a requirement. Otherwise you are better off buying what you’re mining instead. Anything other than that is a personal desicion based on your particular motivations and circumstances. Mining when profitability was low seems to have worked out well for those that mined ETH from November 2016 when it was $10 and barley covering electical costs. However a six card rig was able to mine several ETH a week. If you are in a situation where you have to sell what you mine to pay your costs, it makes it tuff to HODL when profitability is low though.

If all your expecting out of mining is checking whatomine for daily fiat prices, then it's your fault for getting in for the wrong reason.

GPU prices are lagging indicators. They are slow to go up and even slower to come back down. That was the case during the last mining boom during 2013-2014, where it took months after the mining crash during the middle of 2014 before GPU's returned to normal prices.

Given that previous experience, the current GPU shortage and also new product announcements for Q2/Q3, I doubt AMD/Nvidia will ramp up current GPU production to where it would make a significant change in the price other than a return to what GPU's were selling for before the current shortage of the last month. If BTC continues going down, you should see people starting to sell their rigs though.

Today was not a big crash in the altcoin market. Today was a continuation of the crash of the BTC USD value, which has carried over in to the alts that are traded against BTC. If you go to coinmarketcap.com and sort by % change against BTC you will see the average drop for alts in the top 100 was ~5% compared to the ~15% against the USD.

With BTC headed to a 70%+ drop from the ATH and not being able to hold a rally, I would expect that to be the case. However long term nothing has changed for POW mining. Market downtrends like this are why you should be mining as a hedge instead of just for short-term profit. Those that mine and HODL when it's less profitable are in a better position once the market turns around.

You can look at older used cards like the HD 79XX and 295X2, but they use ALOT of power. AMD just announced the increased production last week and it takes time before you will see the increased supply hit retailers. Given mining profits have gone down considerably in the last month, I would just wait.

AMD has increased production to meet the demand, so I would expect to see better availability in the coming weeks/month. On the Nvidia side it seems that have switched production to the new Volta consumer line, so availabilty will be much more limited until the expected launch in Q2.

I run 13  RX 580 on the ASRock H110 Pro BTC+ with USB 6-pin powered risers in Windows 10 v1709. I guess you're not using powered risers? If so you need to plug in the two 4-pin molex PCI-E supplemental power on the motherboard.

I never tried running 6 cards on the H110, so I'm not sure. However the H110 chipset only supports 6 native PCI-E lanes. The rest of the slots are through a PCI-E expansion chip, so that may have something to do with it.

Make sure Windows is installed in UEFI mode and 'Above 4GB MMIO BIOS assignment' is enabled in the Bios under 'Advanced' ==> 'Chipset Configuration'. I also set all the PCI-E Link Speed to GEN2 from Auto.

The hash rate difference between RX 570's and 4GB cards from RX 580's is not that significant. At most 1-2 MH/s. In an ideal situation where you could buy RX 580 8GB cards for $25-30 more, then it makes more sense to buy the better cards to maximize the hash rate on the rig and better long term value. With the current availability that's not the case and I wouldn't overpay to get RX 580's if you can can get RX 570's or 4 GB cads for a better price. One advantage the RX 570's have is they use less power. Up to 30-40 W less than RX 580's when dual mining.

I've had the best luck putting it in the last PCI-E slot. Angry Chicken did an 11 card RX 580 build on that board and used the 8x slot and 4x slot for the PCI-E expansion cards.

https://www.youtube.com/watch?v=jMEXK-ty3mE&feature=youtu.be&t=855

I have a mixed 13 card RX 480/580 8GB rig on the ASRock H110 Pro BTC+. I started out with some RX 570 mixed in on the rig, but as I kept adding RX 580's  I moved the RX 570's to another rig. Most cards have different memory types and overclocking capabilities, so you need to find the best settings for each card. RX 570's and 4 GB cards don't overclock as well as the 8GB cards.

BTC down again and cant hold a rally. Down 60% off ATH. ETH down 35% from ATH and suppoort is stronger. #flippening 2018.

I'm running Windows 10 v1709 with the latest updates on 3 rigs. Claymore and other miners are working fine. It may be Windows is updating your graphics driver. I disable drivers updates in Windows Update.

gpedit ==> Computer Configuration ==> Administrative Templates ==> Windows Components ==> Windows Update and set 'Do not include drivers with Windows Update' to enabled.

According to AWG standards 18 AWG wire is only 1 mm thick in diameter. Going by your pictures it certainly seems to be at least that thickness. The problem is 18 AWG wire is only rated for 10 A max for single core wire, which is 120 W at 12 V and much less for multi stand wire. A GPU dual mining can easily pull 150 W+ from the VGA connector. I had a similar issue with the same type of dual molex to 8-pin connector. Now I only use 18 AWG splitters for 6-pin risers and 16 AWG for 8-pin PCI-E connectors.

https://www.engineeringtoolbox.com/wire-gauges-d_419.html

https://bitcointalk.org/index.php?topic=2571737.msg26194468

Did you also plug in the CPU 4/8 pin from the PSU to the motherboard? Most PSU's have short circuit protection. You can also test the PSU by shorting the power on and ground wires with a paaper clip and see if the fan turns on.

http://support.antec.com/support/solutions/articles/1000015319-is-my-power-supply-dead-the-paperclip-test

What motherboard, cpu and memory do you have?

Hard to say since it's more of a motherboard limitation. With Windows v1709 and the latest AMD Adrenaline drivers I run 13 AMD RX 580's on the ASRock H110 Pro BTC+. BBT was able to run 21 cards in Windows v1709 with the Asus B250 Mining Expert motherboard and 8 P106 mining cards.

https://www.youtube.com/watch?v=miUoqnUqk9M&feature=youtu.be&t=6201