sounds good! I am trying to cut the DB's(NOISE) down so trying different things.
Corsair fan is super quiet. I don't get why they went with these super loud 4400rpm fans when the S1/S3's 3800rpm fans move enough air.
Put 2 s3 fans onto an s7 and watch how quick it overheats....
I'm don't think S3's and S7's are even in the same ballpark. If your looking at a fan that was mentioned great for S3..... chances are it is not enough for S7. Specifically for those of us in summer. I did have one of the S7-F1 variants which had 1 larger fan it actually worked with out issue, but was a higher RPM fan.
So I think you are going to be stuck with higher RPM fan's unless you underclock it. And I would monitor the heck out of it if your messing with fan's. They really were not made to be quiet miner's. There are some good mod's people have done on forum to quiet them some though. Going to S3 level fan... I don't think is one I would do.