Some people don't seem to realize that ZEC mining puts very different demands on your card than ETH mining. ETH mining is 100% memory reads, while ZEC mining, depending on the kernel code, can have more writes than reads. When you modify BIOS straps for ETH mining, you might be using read-write turnaround timing that will cause write errors. Then when someone gets errors or GPU hanging on ZEC mining, they blame the software when their BIOS mod is the issue.
A BIOS guru (not me) can create custom straps that tune each relevant timing value to their safe limits.
The following product brief shows a few of the parameters for DDR5 RAM. For full details see a datasheet.
https://www.micron.com/~/media/documents/products/data-sheet/dram/gddr5/4gb_gddr5_sgram_brief.pdfI agree with you however I don't know how to modify the actual timings for ZEC mining. These timings aren't even modifed for ETH, they were originally modified for Litecoin mining.