Hello,
The RTX 3080 Ventus' 320W power limit is in line with Nvidia's reference design. Currently, there are no plans to provide new vbios to allow increased power limit on the Ventus model.
The RTX 3080 Gaming X Trio series already have base 340W power and this figure can be increased by an additional 2%, total 350W. The advantages of a higher power limit after this point is debatable unless a different cooling method other than air is used. A slight undervolt seems to be more beneficial at this point to squeeze out the remaining last MHz. Yet, nothing is set to stone and could change in the future.
For the crashing issues, we are aware of the situation and investigating the cause. It could be either a power issue or a too aggressive GPU boost algorithm. Nvidia is also aware of the situation and they are also investigating the reports.
Thanks!