Originally Posted by farkle0079
If you can get your hands on them, the original "San Ace Fan of Fame" is the 109R1212H101. I have both 109R and 9G models and the 109R is better.
Originally Posted by Chunky_Chimp
There is, but right now I don't have it on me. Off the top of my head, using my fan as an example:
9 = series
G = sub-series
12 = size
12 = voltage
H = speed class
1011 = tach wire & ribless; this number will differ between fans to indicate features.
Those last 4 digits:
First is thickness: 1 = 38mm, 4 = 25mm, 5 = 50mm
Next seems to be a placeholder for customers. For example, the initial fan number for a Seasonic heatsink fan was 9S1212H463.
Third digit is connection: 1 = tach wire, 2 = no tach wire, 3 = PWM, 4 = PWM
Fourth is optional. They add the 1 if the fan lacks installation tunnels (= no 'closed corners' = 'ribless' etc.).
BTW - if you can get a 9S- (not a 9SG-) cheaply, do so: they are the best fans San Ace makes, the equal of the Gentle Typhoons. No clicking at any voltage. And the 9S1212H401 is 4dB quieter than the 9G1212H401 at full throttle.