i dont understand 1 thing. mining is all about compute power right? 6900 has twice more compute power than 5700 then.it suppose to be at least 100mhs. i dont understand it.
Minins ETH is very dependant to memory bandwith and memory latency...
The 6800/6900 have a bandwith just around 10% more than 5700. The remaining question if the impact of the infinity cache: due to its small size relatively to the DAG size of ETH, it should have a minimal impact on ETH mining.
ok then why radeon 7 has : 1,024 GB/s bandwith performing worse than 3080 which has less memory bandwith: 760.3 GB/s .
Both bandwith and core are used for ETH: for radeon VII, is is probably limited by core computation, for RX 6900 xt, it is mostly limited by bandwith.
For RTX 3080: you should downclock the core at 1200 mhz (to decrease power consumption almost without losing hashrate) and overclock memory at +1000mhz (around equivalent 10000mhz or more) to have the highest hashrate. Therefore you can conclude that this card is more bandwith limited for ETH mining. than compute limited.