Any info on problems with fan speeds on the s9? Got 3 hooked up today, been running 4.5hours now, and one of them likes to ramp up the fans to 6k rpm even though the temps are fine. Maybe a bad firmware? Also one of them is throwing .266% invalid/stale shares but this is below the pool avg so from what I understand thats pretty normal and will level out as I complete the ramp up period. Thanks for the help
You can sometimes get a high amount when you first connect, so it takes a while for the % to drop down to what it's normally going to be.
You can tell by looking at the counts on the Workers when you click on the "Show Details for Invalids:" checkbox.
There's 2 numbers for each column: Total Diff/Number of shares
The Number of shares will probably not be going up - or only going up very rarely vs how many you got when you first connected.
It actually has no expected effect on your Accepted Diff since e.g. if you send 100 shares at 2000 diff but are supposed to send them at 4000 diff, you still get the same result: instead of 100x2000 accepted you'll expect to get 50x4000 accepted.
It's caused by a flaw in the design of stratum.
Stratum sends Work separate to the Difficulty message, and when you first connect, the miner can send a lot of incorrect diff shares.
I argued this with slush when he designed it but it wasn't fixed properly coz it was too much effort to change his pool code ... you can see this in the stratum discussion thread.