I think it's too late to try oiling this one... 

Many pools set the difficulty for each share (portion of a block) based on your hashrate so your faster card is getting more difficult (ie, larger/more valuable) shares to mine.

2.2 MH/s on the network but only 36.5 kH/s on the official US pool? Where my 'murican peeps at?

Before I got my o/c problems sorted out I would say that hsrminer overestimated its hashrate, let's say... but now the pool and hsrminer are in good agreement at ~1220 for a single GTX 1080; that's almost 200 more than I got with ccminer-KlausT.

By the time you wrote that the profitability was outdated 

That said, I don't chase profitability too slavishly; I like to mine coins where difficulty is low relative to price (a subjective call, I'll admit) and that I think have reasonable prospects. I started mining UBQ when it was $1.77US then stopped when it hit $4.00; started MUSIC when it was $0.04 then stopped when it hit $0.10, then started again just yesterday and will probably keep mining it until I hit my next round 1000 in quantity.

But I consider both coins more speculative - along with TZC (Neoscrypt) and DERO (Cryptonight) - to actually bring in some income I have been mining ZEN on luckpool for several weeks now (and just got a 6x GTX 1060 rig up and running specifically for it).

A lot of new pools have sprung up over the last couple of weeks and the official pool upgraded its software making it a much more attractive option (as long as your ping times are low, anyway).

Same thing happened to me with Nanopool, except I didn't put up with their low payouts for an entire month...

I don't mine Ethereum, but I have mined two other Ethash coins - MUSIC and UBQ - and I really like Pool.Sexy for both.

Oh, and you are missing out on at least 5 MH/s per 570 by not doing the BIOS mod.

Did you even do a google search on the missing dll (not ddl)? If you had you would have learned that it is component of the Visual C++ runtime library which can be downloaded from here:

https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

No, and the reasons why have been covered in many of the above posts. You need to get the heat out of the room, not just out of the cards.

I don't want to jinx myself here, but hashrate has been holding steady at 1220 for over 24 hours now, and the pool mostly agrees based on the coins earned vs. average difficulty for the past 24 hours.

So I don't think I'll need your script, but I am interested in seeing it because it sounds really useful and I don't have much experience with powershell scripting (I do have some remnant knowledge of optimizing config.sys and autoexec.bat, however... which probably gives away my age...  )

Yeah, I know about setting fixed difficulty - I was one of the first here to bitch about vardiff going nuts (shooting up to 100001 after a few minutes of mining... with a CPU).

But the problem you describe isn't the result of not having any shares accepted in 5 minutes, rather, it is from not receiving any new blocks to work on in >5 minutes... I occasionally see that with Claymore, too, even though the default reconnect time for it is 15 minutes (which seems reasonable).

That is correct!

Shortage on PCB material? I call bullshit as that would be like a shortage of cement for building houses (can it happen - theoretically, yes - but it's bloody unlikely).

Yep, but YMMV depending on ye olde silicon lottery. Also, the skill level, as not everyone should be doing BIOS mods. I figured that if someone is asking whether or not they should mine a coin that they aren't compiling their own miners and flashing their AMD cards for fun and profit.

Your card should do 700 H/s - maybe a bit more - which will bring in less than 3 DERO per day at the current difficulty. Given that the current price of DERO is $0.60US I would say this isn't the best use of your GPU. However, DERO - like other Cryptonight coins - can be mined with a CPU, and that makes a whole lot of sense even if you only get 1 DERO per day.

My Ryzen 5 1600 can do around 450 H/s after lots of tweaking to xmr-stak, or it can do 380 H/s with Claymore's CPU Miner v3.9 with no tweaking whatsoever. My older FX-8300 can do 325 H/s with xmr-stak, or around 290 H/s with Claymore.

So maybe don't use your GPU for this coin, but definitely use your CPU.

Vega is outstanding at Cryptonight, very good at Ethash, and piss-poor at pretty much everything else. If you plan to do any Equihash, Neoscrypt or, especially, Lyra2v2 mining then get the 1080.

Liquid on electronics won't (usually) damage anything... until you turn the power back on, that is.

For a hail mary - that is, a real long shot - you can try rinsing with distilled or deionized water, then with 91% (or, even better, 99%) isopropyl alcohol - the latter is often sold as water remover for fuel - then leave it in a warm place with air blowing over it to dry; give it at least 24 hours. After all that try powering it up again.

That was a separate incident involving one joker, according to Speedie (the pool operator); what I was referring to are the connectivity issues that seemed to always strike in the middle of the night when I first started mining a couple weeks ago. There was also a rash of blockchain out of sync issues at that time, so it was impossible to tell for sure what the real problem was.

At any rate, it sounds like I am not alone in having connectivity issues today, but as I said before these aren't fatal/unrecoverable disconnects so I'm not too concerned.

Anyone else seeing occasional socket errors/disconnects on the official pool (pool.dero.live), or is it just me? Xmr-stak reconnects and keeps mining, but it's happened several times today so far and this hasn't been an issue for a couple weeks now.

No, the same Nvidia driver is used for all cards... as long as they are Nvidia, that is.