maximum safe freq. for artemis overclocking

[khepelesibilo]

what is maximum safe freq. for overcloking artemis ?
in some rom i see 247MHz in default,but Battrey Status can overclock it up to 312MHz!!!

[mugglesquop]

mine is a standard T-Mobile MDA Compact III, and it runs at 201MHz (standard) The 'safe' clocking speed is usually up to 247MHz.

[Twiggerdingo]

ive got mine scaled (so + and - scaling) and up to 247 with a boost to 273! No problemo's here. 286 goes with no problems too, but uses lots of battery power! I would not recomend to go any higher. The maximum can be different in different makes of the artemis. Ive heard ppl having problems with 286 already.

If you try out to go any higher, be sure to unselect the setting 'scale on reboot'! Then you can give it a SR and try a lower setting again!

[me_]

I would say 247 as mine crashes above 260 and on 260 the text goes all fuzzy and moves around, like it's tripping.

[khepelesibilo]

thanks for your answers :)
is there any damage to CPU if I overclock it to 312MHz or just it don't work ?

also is there any way to reduce speed for longer battry life :p

[asvravi]

Mine goes to 299MHz without problems, I have it set at a max of 286MHz for a while now without issues. But please see below.

The max frequency beyond which artifacts/faults show up could be different for each individual device - it depends on the production lot of the chip. The max possible frequency also depends on the ambient temperature a lot and generally worsens with ambient temperature - you could go overclocking to 299MHz when you are outdoors in the cold but it may conk out in warmer environments or when summer arrives! That is why I have mine set a notch below the max it can handle. You need to find out the max frequency of your particular device yourself by stepping it up one notch at a time and testing it with various apps for a few minutes continuously. Other's experiences are not useful in this regard. Some people wait a day or two but this is unnecessary as long as you test all scenarios - the thermal time-constant would be of the order of a few seconds.
The above applies to immediate faults which you can observe - there may be some long term repercussions when you overclock it for a period of months or years - the lifetime of the chip may go down slightly due to the higher internal temperature arising from overclocking - but I estimate this may be negligible.

I don't think anybody can brick a device permanently by just overclocking - when the overclocking is removed, it should boot normally. If anybody has experience in *permanently* bricking a device by overclocking, please share it here. BatteryStatus has couple of methods by which it can recover from this condition by removing the overclocking. BatteryStatus also has a neat CPUscaling feature which also saves power when the device is not being used.

-Ravi

[luigug]

I temporary overclock to 273 mhz by Battery Status when playing heavy videos or when I call by Skype, but for normal use my Artemis run very well with standard 201 mhz.
:)

[vadarius]

mine 286Mhz without any problem... But my device can't boot up with 299Mhz... keep on restarting...