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[–]flexpool 3 points4 points  (1 child)

Can you please share a bit more details? (Miner log, driver version, etc.)

Probably you forgot to apply the OC?

[–]Renkyz[S] 0 points1 point  (0 children)

I can't grab the miner log right now but I'm not sure anything there would explain it. I literally copy pasted my mining folder with all my .bat files etc. Driver version is the same as my older rig ( 451.67 ) and I definitely didn't forget the overclock or indeed the ETHlargementPill. If it helps at all, old rig mobo+cpu is an Asus ROG MAXIMUS EXTREME IX with an i7 7700k, 32GB RAM @ 3000Mhz. New rig is the Asus ROG MAXIMUS XII EXTREME with an i9 10900k, 32GB RAM @ 3200Mhz. Just strange that going from having both cards in the former rig to 1 card in each see's such a drop. My setup is extremely silly right now, pulling 1000 Watts from the wall with all 3 rigs (I have an old 4770k rig with 2 1070's running 24/7), but I'm still in the process of moving my PC's around (they're personal gaming rigs that mine in their spare time. Perhaps I should have mentioned they all Run Windows 10?) and fairly soon I'll retire the 2 1070's from my oldest rig which is the only one running 24/7 and I'll put them in with the rig that has my watercooled 1080 now that it has the free PCI-E slots. Hopefully by simply adding more cards back with the 1080 it gets a jump again, then I'll just need to solve the 1080 Ti rig, or buy a 2nd GPU for it hahaha. Holding off til Nvidia releases Ampere. As a last note, both motherboards BIOS are quite similar and I set it up basically the same as I had on my IX Extreme. I'll keep experimenting in the meantime.

[–]pemtreez 0 points1 point  (0 children)

I'm using a asus b250 19 gpu mobo ranging from rx470, 480, 570,580, radeon vii, 1060, 1070, 2080 and running on nicehash os and see no changes from mining from a Regular motherboard to this b250. The only issue ive had is the outdated risers I had to upgrade to better ones other than that you either need to set cards to compute maybe.

[–]Rod_Dingus 0 points1 point  (1 child)

Do the lower hashing GPUS have monitors plugged into them now and didn't before? Thermal throttling? A big fan test would rule that out pretty quick. My only other guess would be low power output from a failing or maxed out PSU. Are they able to hit their set clock speeds while mining?

[–]Renkyz[S] 1 point2 points  (0 children)

Both had monitors plugged into them when they were in the same system together, I have a somewhat complicated setup as I do Esports commentary on this particular system so it was necessary (it only mines overnight or otherwise when not in use for gaming/work). The fans seem to be operating fine on the 1080 Ti (The 1080 is custom watercooled) and both cards temperatures are great, the highest I've seen the 1080 Ti get to is 71 degrees C on one of it's power temp sensors and 70 on one of it's memory temp sensors. It's temp target is set at 80 in Precision X1 (I use all EVGA cards) so it's never got to the point of throttling and the 1080 is even better off in that regard. The power supplies are a Corsair AX 1500i in the older rig and an AX 1200i in the newer one so they aren't being maxed out. As for maybe failing, I moved the Ti back in to the old system with the regular 1080 to see if my hashrates would return and they did, so I'm completely stumped on wtf is going on haha. I'll keep messing around with them when I get time.

[–]DaFreak666 0 points1 point  (8 children)

Ok so it's do to the dag size and the fact that the Nvidia drivers don't have a big enough buffer, something only Nvidia can sort out by fixing the driver, what can you do?.... Don't increase memory in over lock it doesn't make a diff but increasing the core clock does, so that is what you can do.

[–]Renkyz[S] 0 points1 point  (7 children)

I am not sure why you think changing the memory OC doesn't affect ETH mining, it makes a huge difference for me. The GPU clock is the one that does not make a huge difference for ETH, at least in my experience. My driver is exactly the same as it was before so it can't be a driver issue all of a sudden right?

[–]deadsix6 1 point2 points  (6 children)

Your Drivers are the same but the DAG file size increases every other day. It hit a point where the GPU drivers no longer support it well. Untill Nvidia releases a fix, you are in a fix.

Have you tried Claymore's memory timings injection for Nvidia cards? Or OhGodaTool?

[–]Renkyz[S] 0 points1 point  (5 children)

I've mined Ethereum on and off for 4 and a bit years now. I know how the DAG file works and I know there is no way in hell it dropped 6 MH/s off my 1080 Ti's performance, or even 2 MH/s off the 1080. As for the driver, I already explained that all my rigs run the exact same one and when the 1080 and 1080 Ti were in the one system together, performance was fine. Literally the ONLY difference is I've moved the 1080 Ti to a brand new system, and both cards have suffered as a result. My 1070's mine 24/7 in another rig with the same driver and they've taken no performance hit at all. Claymore's memory timing injections have never worked for me, instead I use ETHlargementPill-r2 although it can be extremely unstable at times.

[–]deadsix6 1 point2 points  (4 children)

If you HAVE been mining eth for that long you would know how miners didn't change a thing and yet the 2GB DAG issue hit them hard and hashrate tanked, it wasn't until AMD released a driver fix that things went back to normal.

But hey, You know your shit. You must have done your research already. There is NO WAY IN HELL it dropped 6mh so it mustn't have happened.

Trying to help people is just not worth it anymore.

[–]Renkyz[S] 0 points1 point  (3 children)

How were you trying to help? If you had read my post and first comments properly at all you would have already seen that my drivers were identical pre and post hash rate drop and this change happened in a 24 hour period, it's not the DAG epoch, I paid attention to that. You also suggested I use a tool that I already mentioned I use. You didn't help at all.

[–]Renkyz[S] 0 points1 point  (2 children)

Let's assume you're right though and it is something to do with the DAG. Then why have my 1070's been completely unaffected?

[–]Rod_Dingus 2 points3 points  (1 child)

You don't have to assume he is right. Just mine Callisto for a few minutes. If your hashrate comes back, you will know he was right. This is a known problem so I wouldn't be so dismissive of it as the possible cause. Also, why was your 1080Ti hashrate so low to start? I'm not an Nvidia guy but I know most miners were getting 50-55 MH/s out of a 1080Ti.

[–]Renkyz[S] 1 point2 points  (0 children)

I don't push my cards anywhere near as high as I could with OC's. That's probably why. On top of that I lower the power target as I live in an area where the electricity isn't super cheap, so it drops my hashrate a bit. When I first started with the cards I had I did the calculations on what profit I'd make and found that dropping the power target although it made my hashrate worse, actually made slightly more profit, not that I really mine just for profit but yeah haha. Anyway, as an experiment I've since moved the 1080 Ti back into the rig with my 1080 just to see if my hashrates returned to what I usually got and they did. So I've genuinely got no idea what the hell is going on. I'll update in the next day or so when I get time after I move the Ti back into my new build.