i'm having a problem when running more than one gpu, on a old algo like x15, the second gpu do not run at full speed, but it's not throttling, it simply sit there at low core speed, why this?
when i restart the machine for the first few seconds it begin to run at full speed, then the miner close and when i restart it once again it run at slow speed, tried also with the Yimp fork but nothing
Oh dear, I've seen this too much. Here is what I know.
Sometimes when a miner stops and restarts, usually to switch algos, it will exhibit any of the following symptoms:
- it will fail to start with the same parameters
- it will start with reduced intensity (-i)
- it will start in a degraded state, low clock
A reboot will correct the problem.
The occurrance appears to be random. Sometimes a card will get hit multiple times per day, sometimes not for several days
Only some cards are affected, some never exhibit the problem.
There is no pattern to the affected cards, Maxwell and Kepler have both been affected.
It occurs on Windows and linux.
It does not appear to be driver related.
It appears to affect only specific individual cards.
There was discussion about this several months ago. A search on "degraded" might find something.
The bottom line is it was never solved. It's possibly a HW issue.
I do have some new information, It may be heat related, possibly heat stressing a marginal component.
I recently moved an affected card to the basement where it's cooler. It had been crashing often when
profit switching. Since the move it has been more stable but I have not been profit switching with it. I only
switch manually every few days. I may setup profit switching on this PC to try to recreate the problem.
Well there ya go. It's one of those things that has been nagging me for a while. I feel better now.
You could try swapping the cards to see if the problem moves.