nope

Well. it is interesting. Mine is shown as samsung in gpu-z. Can you try HWinfo for example?
As for increase of hashrate we need to overcome memory OC limit and need more timings mods (which are now locked  )

Never heard about Micron GDDR6 on Big Navi, only Samsung. Can you post proof?

Just use latest ones.

63.5 mh/s is rock solid with TRM 0.8.1 under Windows using max possible mem oc and fast timings preset in Radeon Settings.
97 watt by sensor now.
I was able to achieve 89 watt by lowering soc voltage and gpu voltage even lower but it leads to sudden BSODs ((

See my current stable config in detailed screenshot:

poor boy ))
nvidiaInspector -lockVoltagePoint:0,650000 -setBaseClockOffset:0,0,-200 -setMemoryClockOffset:0,0,1675
all the trick ))

yes, one card connected to monitor under Windows

so far so good T-Rex ok ))

MSI GP66 10UG

It is new samsung gddr6 ram, installed to this laptop, I think. Powertuning and memory OC performed with nvidia inspector. Resulting clocks, voltages and wattage you can see on gpu-z screen on the right

Isn't it a world record in terms of efficiency among gpus?

0.62mhs per watt
rtx3070 for laptop - new queen!

it is my own screen shot. It is not fake

very good miner. rtx 3070 for laptop 66.5 mhs @ 108 watt.

with proper tuning VII is VERY impressive. 88mh/s at 140 watt or 102mh/s at 220 watt (from the wall)

If it will have samsung 16gbps memory it will be the strong eth card ))

3080s are greatly overpriced now for only 10gb memory and suffer the same eth inefficiency and mem overheat problems as 3090.
So, I would recommend 3060ti or 3070 for better efficiency and better thermal solution.
If you cannot find 3060 or 3070 - better go for 3090 - it will have more aftermarket sale value and better density.

I think 3090 is better for mining in all aspects except price. But now, when 3080 availability is zero and prices very high, 3090 is rather attractive even in price aspect.

for Vega you should flash it to 56 bios to have tight timings. And use teamredminer

Best mining cards by absolute eth performance

1. RTX 3090 126 mhs easy with proper cooling
2. Radeon VII 116 mhs very difficult with alpha software, sophisticated tuning and liquid cooling
3. RTX 3080 105mhs easy with proper cooling

Best mining cards according mhs/watt

1. RTX 3070 0.59
2. RTX 3060ti 0.58
3. RX 5700/RX 5600XT

Best mining cards according $/watt

1. Vega
2. Vega
3. Vega