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IDProjectCategoryView StatusDate SubmittedLast Update
0002224SpeedFanConfigurationpublic2014-02-20 19:282019-02-06 10:00
Reporterkevindd992002 
Assigned Toalfredo 
PriorityhighSeverityfeatureReproducibilityhave not tried
StatusacknowledgedResolutionopen 
PlatformOSWindows 7OS Version
Product Version4.49 
Target VersionFixed in Version 
Summary0002224: Max of Speeds vs. Sum of Speeds
DescriptionUnder Advanced Fan control, what is the difference between these two fan control methods? I tried searching through google for this and cannot find an answer anywhere.
TagsNo tags attached.
Motherboard ModelASUS P8Z68-C/GEN3
Video Card Model
Attached Files

- Relationships

-  Notes
(0007334)
kevindd992002 (reporter)
2014-02-24 15:07

BUMP! Why can't this be acknowledged like others?
(0007335)
alfredo (manager)
2014-02-24 15:28

Each fan speed can be set according to one or more response curves. If you have, say, two response curves, you might define one to control from 25% to 70% and another one from 0% to 30%. If you choose MAX OF SPEEDS, the resulting fan speed range will be from 25% to 70%. If you choose SUM OF SPEEDS, the resulting fan speed range will be from 25% to 100%.
(0007338)
kevindd992002 (reporter)
2014-03-03 14:39

Ok. So basically for both methods the values that are followed is the min and max ONLY of the whole range? Does it consider the values in between?
(0007339)
alfredo (manager)
2014-03-03 14:52

No. Both methods are meaningful only if you control a fan using two or more response curves. The value obtained from each curve is then either added or "selected" (if you chose MAX).
(0007340)
kevindd992002 (reporter)
2014-03-03 15:19

Yes, I understand that and I will be using two or more response curves. So what happens is for every temperature (X value), it either chooses the larger fan speed (Y value) for MAX OF SPEEDS METHOD and it adds the two fan speeds (Y value) for SUM OF SPEEDS METHOD?
(0007341)
alfredo (manager)
2014-03-03 15:28

Correct!
(0007342)
kevindd992002 (reporter)
2014-03-03 15:36

Gotcha! What if the number of X data points on one curve is different from the other curve? Which would it follow?
(0007343)
alfredo (manager)
2014-03-03 15:54

The curves are interpolated for unspecified X points.
(0007344)
kevindd992002 (reporter)
2014-03-03 17:15

Ok. What if the first curve is from specified from 30degC to 70degC and the second curve is from 20degC to 85degC:

1.) What fan speed will it follow when the temp is 20degC for both methods?

2.) What fan speed will it follow when the temp is 50degC for both methods?

3.) What fan speed will it follow when the temp is 85degC for both methods?

4.) What TEMP will it follow if the fan is specified for more than one temp reference for both methods?
(0007345)
kevindd992002 (reporter)
2014-03-04 14:58

BUMP!
(0007347)
kevindd992002 (reporter)
2014-03-06 18:27

Alfredo?
(0007360)
kevindd992002 (reporter)
2014-03-21 13:22

Alfredo why are you not replying?!
(0007383)
kevindd992002 (reporter)
2014-04-19 00:43

Don't you really have any plans on replying?!
(0007384)
MaxusR (reporter)
2014-04-19 09:29

Just try and see. What's the problem here?)
(0007385)
kevindd992002 (reporter)
2014-04-19 19:11

Just to reiterate, here are my pending questions:

Ok. What if the first curve is from specified from 30degC to 70degC and the second curve is from 20degC to 85degC:

1.) What fan speed will it follow when the temp is 20degC for both methods?

2.) What fan speed will it follow when the temp is 50degC for both methods?

3.) What fan speed will it follow when the temp is 85degC for both methods?

4.) What TEMP will it follow if the fan is specified for more than one temp reference for both methods?
(0007669)
kevindd992002 (reporter)
2015-01-06 19:10

Will this ticket be ever replied?
(0007670)
MaxusR (reporter)
2015-01-07 11:48
edited on: 2015-01-07 12:41

Just to be friendly:
Any values beyond a curve are the same as the closest values on the curve.
So, if some curve is defined in range 30 - 70 deg, then the value for 20 deg is the same as for 30 deg. And the value for 85 deg is the same as for 70 deg. You should take into account the warning level for the Temp too.
Now everything is like in the above.

Also, I can't understand your questions about "when the temp is 50 deg C for both of the methods". The temp for one of the curves can be 50 deg, and some another temp for the other. "MAX of speeds" gets the maximum of the values on both curves. "SUM of speeds" gets its' sum.

One more explanation. You set single fan speed, taking into account one or more curves. Each curve specifies some SPEED value for some TEMP of some SENSOR.
For example: one sensor is CPU and it's current temp is 50 deg C. You add new curve for the sensor and define 70% fan speed for 50 deg C. The other sensor is GPU and it's current temp is -999 deg C (LOL). You add one more curve for the sensor and define 20% fan speed for 30 deg C. If you choose MAX of speeds, you'll set current speed of the selected FAN to 70%, cause 70%>20%. If you choose SUM of speeds, you'll set current speed to 90%, cause it's 20%+70%.

(0007788)
kevindd992002 (reporter)
2015-03-15 01:46

@raccoon

Why did you delete your comment?

- Issue History
Date Modified Username Field Change
2014-02-20 19:28 kevindd992002 New Issue
2014-02-20 19:28 kevindd992002 Status new => assigned
2014-02-20 19:28 kevindd992002 Assigned To => alfredo
2014-02-24 15:07 kevindd992002 Note Added: 0007334
2014-02-24 15:28 alfredo Note Added: 0007335
2014-02-24 15:28 alfredo Status assigned => acknowledged
2014-03-03 14:39 kevindd992002 Note Added: 0007338
2014-03-03 14:52 alfredo Note Added: 0007339
2014-03-03 15:19 kevindd992002 Note Added: 0007340
2014-03-03 15:28 alfredo Note Added: 0007341
2014-03-03 15:36 kevindd992002 Note Added: 0007342
2014-03-03 15:54 alfredo Note Added: 0007343
2014-03-03 17:15 kevindd992002 Note Added: 0007344
2014-03-04 14:58 kevindd992002 Note Added: 0007345
2014-03-06 18:27 kevindd992002 Note Added: 0007347
2014-03-21 13:22 kevindd992002 Note Added: 0007360
2014-04-19 00:43 kevindd992002 Note Added: 0007383
2014-04-19 09:29 MaxusR Note Added: 0007384
2014-04-19 19:11 kevindd992002 Note Added: 0007385
2015-01-06 19:10 kevindd992002 Note Added: 0007669
2015-01-07 11:48 MaxusR Note Added: 0007670
2015-01-07 12:01 MaxusR Note Edited: 0007670 View Revisions
2015-01-07 12:40 MaxusR Note Edited: 0007670 View Revisions
2015-01-07 12:41 MaxusR Note Edited: 0007670 View Revisions
2015-03-14 21:21 raccoon Note Added: 0007787
2015-03-14 21:24 raccoon Note Deleted: 0007787
2015-03-15 01:46 kevindd992002 Note Added: 0007788
2019-02-06 10:00 user5582 Note Added: 0008859
2019-04-01 12:39 almico Note Deleted: 0008859


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