Poloniex has had problems with SiaCoin since at least last December.  Don't leave SiaCoins on Poloniex.  They take weeks to respond to inquiries.

You will get much better performance, in my experience, from the latest Adrenaline drivers.

Here is the trick for modded bios files:  If these are fresh cards, apply the bios mods using ATIFlash, install the new driver but do not restart.

After installing the Adrenaline drivers on a rig whose cards have modded RX bios mods, run 1.4.6 of atikmdag-patcher.exe prior to restarting.  Then restart.  All should be good.

Anyone using Vegas and Windows should try out cast-xmr-ui and Cast 0.9.2 at some point.  Cast is updated for the fork.  Cast-xmr-ui provides for hash rate monitoring/restarting, forces compute mode (handy for RX 570/RX 580) and makes life easier overall.

YMMV, but if you 8+ Vegas on one rig, the old blockchain driver may be more stable for you.  I think for fewer Vegas, the latest Adrenaline drivers work well.  You still have to disable crossfire in the Registry; you still need a decent SoftPowerPlay modification to curb power draw.  But it has gotten much easier.

https://github.com/anadventureisu/cast-xmr-ui

cryptonightv7.usa.nicehash.com:3363

I do not know of any Vega-specific, air-only heatsink retrofit.  The Morpheus II works pretty well, but it isn't quite the walk in the park that the YouTube video makes it out to be.

The board is exposed.  What you can do is spray the board (front and back) with liquid silicone and then let the board dry for at least a week.  The plug the board + Morpheus II into your rig.  The silicone provides protection against water/shorting.  Do not spray the board with silicone and then try to connect it up that same day or a day later; you will probably short out something on the board.

The Morpheus II when installed right is very quiet (120mm fans versus reference blower fan), and does run cooler at relatively low noise levels.

I think I posted on YouTube what the one video left out in terms of how to go about removing the various sets of screws.

If you are using Adrenaline 18.x.x drivers, you have to toggle compute mode on, not graphics mode.

Careful with that Morpheus II retrofit.  The video you linked to is one out of two that should be watched if you are going to try this (I've done 8 Vega Morpheus II retrofits).

There are a lot of slightly different sized screws to remove.  The card becomes very lopsided/weight heavy because you have a massive heat sink on one side + 2 120mm fans clipped to the heatsink, and the bare circuitboard on the other side.

The final mounting to GPU is tricky as the tiny screws can become loose.  I used LocTite to stop this.

And your cards will be almost completely exposed.  The upside is that you can apply good thermal paste; I found Vegas' thermal paste to be all over the board; too thick, too thin, very dried out, etc.

And 120mm fans are much quieter than the single blower reference fan running at 3,000+ rpms.

Helps also with HBM memory temps while not being very loud at all.

You have something set wrong.  Is "compute" mode enabled?

Cast 0.9.2 + Cast-xmr-ui + Adrenaline drivers work well together (Vega cards)

You still need to apply SoftPowerPlay tables to reduce power draw.
You still should go into the Registry and disable autocrossfire and ULPS.
You may want to run the atikmdag-patcher as well.

[run DDU to remove old drivers; reboot.  Install Adrenaline drivers but do *not* reboot.  First change registry settings, apply SoftPowerPlay mods, run atikmdag-patcher.exe, then restart]

If you use cast-xmr-ui, you do not need to include the --ratewatchdog setting, nor do you need JJ's script anymore.  Cast-xmr-ui handles rate drops and restarts and the settings are user configurable. Cast-xmr-ui toggles compute mode for RX 570/RX 580 cards.

Cast 0.9.2 + cast-xmr-ui + OLD August beta blockchain drivers will get you slightly better hashing speed, but it is fairly small as in the difference between 1920 vs 1905/1900 with Adrenaline.

For everyone who is reporting problems with --ratewatchdog, try cast-xmr-ui. Do make an immediate backup of cast-xmr-ui's config file after unpacking.  You can manually edit the config file, but be careful.

I want to leave a brief update that I just spoke to Nhan Do and my particular issue is resolved.  Happy mining.

For Vega 56, 64, RX 580/570:

It's a whole new ballgame with Cast 0.9.2 + latest Adrenaline 18.x.x drivers + cast-xmr-ui graphical user monitoring interface (available via Github, see Cast thread for the link).

- No need for buggy August BlockChain drivers.

- Cast 0.9.2 has a new --ratewatchdog function to monitor hash rate drop offs/ followed by a restart (no need to modify prior scripts from JJ-CircusDad)

- Cast-xmr-ui turns on "compute" mode without slogging through AMD settings one card at a time

Try this out.  I think you will be impressed.

Try using "-R" instead of "--remoteaccess"

As far as I could tell, one by one.  The Registry setting doesn't seem to exist prior to using AMD Settings to toggle compute on. But once set it survives reboots and seems pretty solid.

Everyone speculates about whether SIA will rise or fall, but how many take the time to read up on what SIA is and why it might be used?  I thought, hey let's find out what it takes to actually use this system.  What do I have to do to host?  How cheap or expensive is it to rent storage space?  Interestingly, Siatech doesn't have this basic information (why not?).  You eventually find a link to a "third party" site called SiaSetup.

Right now, I would say SIA is way too complicated to gain wide user adoption.  And the website says it is not aimed at individuals, it is more for 'enterprises' which I think is a huge strategic mistake.  I think SIA could take off if it focused on individuals first and not enterprises.  Win over loyal individuals and they will market your product to the enterprises they end up working at.

Whether a hoster or a renter, your SIA wallet needs to be running most if not all of the time.  If, as a host, your computer goes down, you pay penalties (loss of posted SIA collateral).  If as a renter you do not "top off' your credits every 6 weeks, your 3 month contract may elapse and when it does, your data goes POOF.  There are too many penalties as I read SiaSetup for hosters and renters.  The average storage price, 18 SIA per Terabyte, per month, is attractive.  But by default SIA slices and dices your data and distributes it to 30 hosts, and you have pay for a contract with each host.  The contract rate, at least as it appears on SiaSetup is more expensive than storage which doesn't make much sense.

And you can only retrieve your data from the same computer you uploaded your data from.  Think about that.  Well, actually, you can backup all your SIA data files and copy them over to another computer.  But the first time you upload or download a file, then you have to recopy everything all over if you want to retrieve the files from a different system.  I had to re-read this part it is so incredibly user unfriendly.  If my files are chopped up and encrypted in the cloud, half of the value proposition to me is that I can grab them from anywhere there is an Internet connection.  But not so with Sia.  This is one of those wtf are you thinking types of flaws.

I use Mega and it is easy, relatively intuitive, convenient, and not that expensive.  I was attracted to SIA because I thought it might be a distributed, more redundant, more secure, better type of Mega for storing files.  SIA is not that in its current incarnation, which is a shame.  I love the idea of distributed, redundant, encrypted hosting.  That's a powerful capability.  But I think renters, for example, should have some sort of grace period if they are late on topping off their credits before their files are deleted.  And I wonder (it's not explained on Siasetup) whether auto-notifications warn renters about the impending deletion of their data?  And while I understand the thought behind making hosts pay when their computer goes down, I think the cost to the hosting entity should be smaller.  There are power losses beyond the ability of conscientious people to avoid those mishaps.

For hosting, you need a minimum of 4 free TB or you are penalized.  And you start out being penalized because you haven't earned "trust" yet and it takes six weeks or more to climb out of that hole.  This seems to do nothing more than skew hosting towards those who were early in setting up their storage and who now have, by virtue of time, a higher trust score.  I don't like this.  If you want to measure trust, it should be based on some short rolling average of up-time for the host.  Maybe it is, but this is not well explained on SiaSetup.  And if I am correct, this is a somewhat suspect way to tilt the field towards those who got into SIA right from the beginning.

It's no wonder to me that there is plenty of empty, un-rented, unused storage at the moment.  SIA is not friendly or easily accessible to individuals in the way that Mega is.  I hope that the developers really work on making the entire ecosystem much easier to jump into -- both for persons who wish to rent out unused HD space, and for persons (not just enterprises!) that want a better alternative to Mega, or Amazon, or the greatest privacy destroying data sponge of them all -- Google.

SIA is a great idea.  But the implementation for end users is too complicated to gain widespread adoption anytime soon.  KISS.  This is all fixable and I hope to see more efforts both on the main webpage and in the software to make hosting and renting storage space an easy, painless, experience.  The world doesn't need another payment token.  The world does need a better way to store files privately and beyond the ability of governments and other individuals to spy on that data.  The developers clearly recognize this but they aren't making it easy for Joe sixpack to use their system.  At least not yet.

In the meantime, just because I like challenges, I am going to set up hosting.  And maybe someone should have a talk with Kim Dotcom.  Just saying.

Cheer up, batch 4 of the Obelisk miners are now on sale.  :-P

Can't speak to Win7, but under Win 10, the latest Adrenaline drivers give excellent results for RX 480/570/580.  General process is find and apply whatever memory strap improvement that matches the memory on your card, install latest AMD driver, immediately run amdpatcher.exe before restarting.  That avoids the Window crashing on startup issues with latest Adrenaline drivers.  *** Make sure you also enable "compute" mode in AMD Settings.

Asus Prime Z270-A, or Z370-A - both good boards.  ASUS has very good service as well.

I'm not following this particular point.  I have the same bracket and there were no issues as far as closing the front face place; no modifications were necessary at all.  I simply moved the frame back enough to where the side beams align with the screw holes in the case side.

The Corsair maglev fans on those are very nice and they run really well.  I do use SMOS on some rigs and I like it.

Not really the right thread for this, but the answer is yes, you can.  Take the 650w PSU and plug it into the motherboard and maybe power 1 or 2 1070 cards.  Take the 900w PSU and use it to power your other 4 or 5 1070 cards, but don't connect it to the motherboard!

Eh, it's not so hard.  You just have to back up the original and then be careful to apply a compatible new one.
The advantage is this:  going from 700 H/s on an RX 480 8 GB to a very steady 860 H/s.