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YoDude's Avatar
Posts: 2,869 | Thanked: 1,784 times | Joined on Feb 2007 @ Po' Bo'. PA
#11
Originally Posted by egoshin View Post
I don't want to do a second search through Overclock N900 thread - it is too time consuming

But I remember it was related with 800MHz and I remember titan changed frequency because of that to 810MHz (or 815?).

I didn't look in that part of kernel source but it seems to me that there is a high probability that kernel doesn't switch CPU to that frequency.

However, the switching capability may depend from other factors too - again, I had no time to look into that part of kernel code.
Yup, I found a reference to it in the WiKi...
>> http://wiki.maemo.org/Overclocking

===titan's ideal kernel===

VALUE VOLTAGE FREQUENCY DYNAMIC POWER
30 0.975V 0 MHz 0.000 Vē/us
30 0.975V 125 MHz 118.828 Vē/us
30 0.975V 250 MHz 237.656 Vē/us
30 0.975V 500 MHz 475.312 Vē/us
33 1.012V 550 MHz 563.279 Vē/us
38 1.075V 600 MHz 693.375 Vē/us
45 1.163V 700 MHz 946.798 Vē/us
45 1.163V 750 MHz 1014.427 Vē/us
48 1.200V 810 MHz 1166.400 Vē/us
48 1.200V 850 MHz 1224.000 Vē/us
54 1.275V 900 MHz 1463.062 Vē/us
54 1.275V 950 MHz 1544.344 Vē/us
60 1.350V 1000 MHz 1822.500 Vē/us
72 1.500V 1100 MHz 2475.000 Vē/us
72 1.500V 1150 MHz 2587.500 Vē/us
Thanks.


It's amazing how much info is already out there when we search.
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YoDude's Avatar
Posts: 2,869 | Thanked: 1,784 times | Joined on Feb 2007 @ Po' Bo'. PA
#12
I couldn't take it any longer

I went back to the 800MHz image I stored on the N900. The difference when reverting to the stock kernel was to great. It was like flying first class for a month and then told you have to go back into steerage class... or worse, Student Standby.

Opening web pages from desktop bookmarks was the most painful.
I did run Sygic Maps from MHz and had it route me from Philadelphia, PA to Canyon City, Oregon, a distance of 3549 miles and it took 25.28 seconds. The same locations and route at 800MHz took 18.02 seconds.

This ^ isn't science, just a simple observation. From reading the Wiki and threads it seems that 805MHz is now being used by some. The reasoning behind these 800 vs. 810 vs. 805MHz settings aren't very clear and maybe it ain't science either.

Regardless, there seems to be some issues with all of the kernels after making a phone call.

I don't use my device as a phone so perhaps that is why I haven't had any problems @ 800MHz. The OP said he verified that he was at 800 using Conky before downgrading so it doesn't sound like the phone call bug was a factor in his observation as well.

But then again one of the existing overclock threads would yield more answers.
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Last edited by YoDude; 2010-05-01 at 08:08.
 
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