Hi
Hashrate on my Nvidia rigs (1080 and 1080ti) has decreased about 15% in the last year. I have to increase power limit substantially to get the same hashrate as before.
Does anyone have any explanation for this? what is the problem with Nvidia GPUs or maybe Ethash algorithm?
Most possibly rhe TLB is cached on two levels and as the DAG grows the first level can't hold all the records and the usage of the second level cache increases. The problem can be solved on driver level from Nvidia by increasing the virtual memory page size (introduce AMD driver's compute mode) thus decreasing the TLB records that are used.
Thanks for explanation.