not much improvement in fact a bit worse ,, I have settled with 1 delta as a push and a 367 freq.
If I want to I can get freq 412 and 1331 gh but too many fans to do it.
I wasn't aware that they are interchangeable. Is it as simple as installing the S5 innards (blades and controller) into an S3 case or some other way? I think the S5 are a tad narrower and a bit longer (if a 2nd pull 12038 fan is installed at the other end) than the S3 based on the dimension in the specs. Note that there is also a cover on the base of the S3. How is the mod done?
S5:
300mm x 137mm x 155mm
S3:
331mm x 137mm x 160mm
So identical widths, S3 a bit higher due to the top and bottom plates it seems. S3 is longer due to the additional fan, but that should account for 35mm, which suggests that the S5 is a bit longer.
I really meant higher - not narrower (in standard orientation and not on its side). An additional 12038 fan would make the S5 at least 338mm long. I guess the question is: do both models have identical mounting/screw holes?