Quote from: adaseb on May 19, 2019, 07:31:03 AM

Quote from: br2459 on May 19, 2019, 12:52:40 AM

Is anyone getting lots of hashrate bounces? I don't remember it being soo extreme. Before it used to be something like 30MH/s then maybe a drop to around 26MH/s or so but I am seeing drops down to 18MH/s sometimes. By before, I mean using a custom bios and version 12 of the miner. Watching the voltage and clock speeds it seems to be doing the same thing. Temps bounce between 53C and 57C along with those.

https://imgur.com/a/Vi4gZn0

Attached are a few screenshots

Yes I get these also and I pretty much have been getting them for the last few years of mining ETH with the RX gpus. I have no idea why they happen. At first I assumed it was because the CPU was busy installing some Windows update or something else was running in the background and later it went back to the normal speed, however an hour later for a few seconds the same thing happened.

I tried different motherboards, different CPUs, more RAM, different OSs, different AMD drivers and basically they all get this issue. Sometimes its 1 GPU and sometimes its another GPU in the rig. I find that, usually the slowdown only affects 1 GPU at a time and never more than 1 so I just left it as is. Its only like this for a few seconds and eventually goes back to the full speed.

If anyone has an idea please let me know, however its a minor issue.

So, it looks like the issue was with the Sapphire RX 480 8GB card. I am now using a Sapphire RX580 8GB Special Edition and it's constant. Very little hashrate drop. Side note it's running 33.2MH/s with -strap 1 and -rxboost -1.