disk speed doesn't matter for -a 3 (except if you are really swapping, that would be performance killer, but you should be able to monitor the disk activity very easily on each and every operating system)
cooling/throttling could matter if you bought some non-founder-edition (not-reference-design) GPUs
but my guess is you should try to test with at least 32 GB of RAM and check e.g. with some tuning software (afterburner etc if they indicate some problems)
Normally we would also advice to use -w 3 and -O (but there are no special/optimized kernels for -m 6211)
cooling/throttling could matter if you bought some non-founder-edition (not-reference-design) GPUs
but my guess is you should try to test with at least 32 GB of RAM and check e.g. with some tuning software (afterburner etc if they indicate some problems)
Normally we would also advice to use -w 3 and -O (but there are no special/optimized kernels for -m 6211)