Antminer: S5 fan verus S3 fans

[dsh]

Hello

Generally speaking, are the fans on S5 and S3 the same?

With an S5 the fan at 3,000 is probably 10 times the sound of the two fans on the S3 running at the same speed. But they are running at the same RPM.

[adaseb]

No its the same size but its a different design and S5 fan is MUCH louder.

[dsh]

No its the same size but its a different design and S5 fan is MUCH louder.

Interesting.

From: https://www.bitmaintech.com/productDetail.htm?pid=00020160105104607947aoAkWsJK06D0

Fans for AntMiner S3, S5, S5+, S7, the length of wire is 24cm.

Why is Bitmain selling a fan for all versions? If purchased, would you expect this fan to be louder on the S3, or to just run at much lower RPM?

Is Bitmain selling a single fan to be used on both S3 / S5?

[adaseb]

The S3 had 2 of the quieter fans and the S5 just has 1 loud fan to move more air. Either will work with the S3

[VirosaGITS]

Hello

Generally speaking, are the fans on S5 and S3 the same?

With an S5 the fan at 3,000 is probably 10 times the sound of the two fans on the S3 running at the same speed. But they are running at the same RPM.

Naw, the S3 fan at high speed have a very loud noise as well, its just that the S3 did not run them at full speed. When ran at similar RPM they have similar noise level, but the S3 get a higher pitch faster.

I think the S5 fan simply can reach higher RPM, so if the RPM of the "global fan" is set properly, there will be no noise issue.

[dsh]

Hello

Generally speaking, are the fans on S5 and S3 the same?

With an S5 the fan at 3,000 is probably 10 times the sound of the two fans on the S3 running at the same speed. But they are running at the same RPM.

Naw, the S3 fan at high speed have a very loud noise as well, its just that the S3 did not run them at full speed. When ran at similar RPM they have similar noise level, but the S3 get a higher pitch faster.

I think the S5 fan simply can reach higher RPM, so if the RPM of the "global fan" is set properly, there will be no noise issue.

Here there is an S3 running two fans, 1@4000RPM, 2@2000RPM, and it is very quiet. Nearly silent.

And then there is an S5 running one fan @3400RPM and it is 10 times louder at least. To get to a similar loudness with S5 requires going down to around 1600-2000RPM

[VirosaGITS]

Hello

Generally speaking, are the fans on S5 and S3 the same?

With an S5 the fan at 3,000 is probably 10 times the sound of the two fans on the S3 running at the same speed. But they are running at the same RPM.

Naw, the S3 fan at high speed have a very loud noise as well, its just that the S3 did not run them at full speed. When ran at similar RPM they have similar noise level, but the S3 get a higher pitch faster.

I think the S5 fan simply can reach higher RPM, so if the RPM of the "global fan" is set properly, there will be no noise issue.

Here there is an S3 running two fans, 1@4000RPM, 2@2000RPM, and it is very quiet. Nearly silent.

And then there is an S5 running one fan @3400RPM and it is 10 times louder at least. To get to a similar loudness with S5 requires going down to around 1600-2000RPM

My S1 and S3 fans must be different then, because at 3000RPM they sound like a heavy drill, and the S5 fans run at the minimum speed, which is 2400RPM are quieter, through not by much, but the noise is a much lower pitch, so more bearable imo.

[adaseb]

The S5 fan at min speed makes more noise then the S3 fan at like 3000 rpm even. Its probably because of that directional mesh in the back.

[dsh]

Okay so apparently the S3 fan@4000RPM is actually the fan from this post: https://bitcointalk.org/index.php?topic=1233613 (Delta AFC1212DE 120mm x 38mm).

So this fan is basically noiseless at this speed then whereas the stock S3 fan would be making as much noise as the stock S5 at that speed.  

Unfortunately, as from the post above, the Delta AFC1212DE does not want to run with the S5.    

Fortunately there is another S3 here and another AFC1212DE that will go nicely together once the 4-pin fan header splitter comes in the mail on Monday . (The splitter will bypass the front fan port which is burned out.) Too bad both fans will be on the back header and the back appears to get less RPM than the front (4000RPM versus 2000RPM on another S3 that is here).  

[pinhead666]

I made my own board to run 2 (S5) fans from one fan-header. This is my prototype of it. It's with own power-connector.

[BTC_ISTANBUL]

I made my own board to run 2 (S5) fans from one fan-header. This is my prototype of it. It's with own power-connector.

Well done.However there is an easier way.Use a breakboard and power your fans from the board.

[pinhead666]

I use 4 fans with one controller (for two miners) and don't want to overload controller. That's why I did this.

[dsh]

Could it be detrimental to run two fans on the same header?

[pinhead666]

Could it be detrimental to run two fans on the same header?

Stock fans are power hungry, I don't want to try split power for two fans from one header. I take only pwm-signal from header, feed it to two fans and they have their own pci-e power-connector. And speed signal returns from fan1. Common grounds with all headers ofcourse. It's easily done with a couple of smd resistors and caps + 1 diode and electrolytic condensator. No fear to burn controller (this regards S5) or header. Cable that feeds power to the controller can't handle much current. I copied original circuit from S3 (same circuit is used in S5) and modified it a little bit.