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Using LM2596 DC-DC for N900 (7)
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2013-12-14
, 21:24
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Posts: 17 |
Thanked: 7 times |
Joined on Dec 2013
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#1262
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Originally Posted by Hurrian
So can you just confirm me that kernel-plus supports undervolting at stock clock? Thank you
OC/UC, OV/UV works.
K+ users beware that I don't personally use this on a daily basis for a number of reasons though!
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2013-12-14
, 23:38
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Posts: 1,225 |
Thanked: 1,905 times |
Joined on Feb 2011
@ Quezon City, Philippines
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#1263
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IIRC the minimum voltage is at the bottom of the slider range in the Opptimizer UI, however you can write any voltage and frequency target you want into /proc/opptimizer.
Dragons beware!
Dragons beware!
__________________
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
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2013-12-15
, 00:42
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Posts: 2,021 |
Thanked: 1,060 times |
Joined on Apr 2010
@ Hong Kong
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#1264
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Kernel plus opptimizer version is 1.5.3, cant 1.5.4? Because it always show update in opptimizer ui when startup
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2013-12-15
, 01:01
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Posts: 1,225 |
Thanked: 1,905 times |
Joined on Feb 2011
@ Quezon City, Philippines
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#1265
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1.5.3 is the latest module version source on Bitbucket.
__________________
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
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2013-12-16
, 11:22
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Posts: 17 |
Thanked: 7 times |
Joined on Dec 2013
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#1266
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I managed to undervolt my N9 to 1.075 V (at 1ghz stock clock). I had to disable SmartReflex CPU in order to go below stock voltage.
I can also reach 1150 mhz with 1.1875 V (my stock voltage).
Pretty good I think .
I can also reach 1150 mhz with 1.1875 V (my stock voltage).
Pretty good I think
.
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2013-12-16
, 12:26
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Posts: 1,225 |
Thanked: 1,905 times |
Joined on Feb 2011
@ Quezon City, Philippines
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#1267
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Originally Posted by gipawu
You've probably used up more battery power by shutting down SmartReflex than what you save by moving the OPP Voltage Target.
I had to disable SmartReflex CPU in order to go below stock voltage.
SmartReflex is calibrated at production, and on the OMAP3630 HS as used on the N9/50, SR Class 3 automatically targets the lowest voltage possible when enabled. It also shuts down unused portions of the SoC to save power.
Undervolting is pretty much moot - it had some impact back on the N900, but on the N9/50 it's pointless.
I do not know if the SmartReflex values on the N9/50 are calibrated for frequencies beyond 1000MHz, but if they were, it should keep working (at least until the highest factory clock speed OMAP3630 goes to - 1200MHz)
__________________
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
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2013-12-16
, 12:49
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Posts: 17 |
Thanked: 7 times |
Joined on Dec 2013
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#1268
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Originally Posted by Hurrian
Thank you for your reply, I'll do some tests to see if undervolting is worth or not.
You've probably used up more battery power by shutting down SmartReflex than what you save by moving the OPP Voltage Target.
SmartReflex is calibrated at production, and on the OMAP3630 HS as used on the N9/50, SR Class 3 automatically targets the lowest voltage possible when enabled. It also shuts down unused portions of the SoC to save power.
Undervolting is pretty much moot - it had some impact back on the N900, but on the N9/50 it's pointless.
I do not know if the SmartReflex values on the N9/50 are calibrated for frequencies beyond 1000MHz, but if they were, it should keep working (at least until the highest factory clock speed OMAP3630 goes to - 1200MHz)
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2013-12-19
, 14:40
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Posts: 17 |
Thanked: 7 times |
Joined on Dec 2013
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#1269
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I've done some tests, with undervolting the current consumption in load is slightly reduced, but in idle is increased, so you are right, SmartReflex disables some parts of the soc when they are not used. However I think undervolting is worthing during heavy cpu load (e.g. games).
| The Following User Says Thank You to gipawu For This Useful Post: | ||
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2014-01-20
, 23:16
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Posts: 649 |
Thanked: 762 times |
Joined on Mar 2012
@ Ohio
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#1270
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I have been following this thread since the beginning, but have yet to overclock my N9 because FasterN9 has taken care of most of my lag problems. There are two instances, however, where I do have some lag and I was wondering if anyone had any experience with overclocking helping in those areas.
1.) When my events screen updates, the first time I scroll through the new posts it stutters (once I have scrolled through once it no longer stutters).
2.) My keyboard is sometimes slow to pop up in the messaging app.
3.) System slow down with incoming messages or calls.
Has anyone had these issues before overclocking, and no longer has them after overclocking?
1.) When my events screen updates, the first time I scroll through the new posts it stutters (once I have scrolled through once it no longer stutters).
2.) My keyboard is sometimes slow to pop up in the messaging app.
3.) System slow down with incoming messages or calls.
Has anyone had these issues before overclocking, and no longer has them after overclocking?
K+ users beware that I don't personally use this on a daily basis for a number of reasons though!
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.