Quote from: AzzAz on January 21, 2018, 07:09:35 AM

Quote from: xeridea on January 21, 2018, 05:35:44 AM

Quote from: rustyTuB on January 20, 2018, 11:46:42 PM

Claymore v10.0 &v9.1 are producing a 50 watt increase in any of my GPU's power consumption right at "create GPU buffer" during startup. To get this to happen I just need to have GPU clock set to a certain speed. In the case of two of my 8GB ASUS Radeon RX580's that speed is:

GPU normal high voltage
power power
1 1000 MHz 1001 MHz 900mv
2 1010 Mhz 1011 MHz 900mv

This issue is insensitive to the memory clock which has been the standard 2000 MHz through 2050 MHz.
I've had the issue with the standard BIOS and modified BIOS.
I only have Claymore v10.0 and v9.1 to test.
The issue is consistent, very repeatable. Operation is unchanging after startup.
I have to rigs suffering this issue, each has their own Radeon cards.

What's going on in GPU Buffer Creation that can trip up the GPU into higher power consumption?

Anyone experience this?

Dag creation is compute intensive, causing more power use, and possible instability on heavy undervolt. Mining Ethereum is memory intensive, so the actual GPU core is underutilized. This is intentional to be highly ASIC resistant. If PSU is underpowered, or DAG creation causes crash from undervolt, use this option (from OP....)

-lidag low intensity mode for DAG generation, it can help with OC or weak PSU. Supported values are 0, 1, 2, 3, more value means lower intensity. Example: "-lidag 1".
You can also specify values for every card, for example "-lidag 1,0,3". Default value is "0" (no low intensity for DAG generation).

So creating DAG file would take a bit longer, but you don't get increased power usage for the ~5 seconds it takes.

wonderful explanation!

Yeah, it mostly makes sense. I'm sure though the power consumption increase during DAG creation can not be anywhere near 50W/GPU
In fact there's probably NO spike comparing to the regular mining.
What I'm sure though is that the GPU initialization by this miner may occasionally(?) run GPU through stages and voltages somewhat different from the set config.