That's nice. As I said, different N900s are different. That's received doctrine.

yeah of course im aware of that but besides, ive heard rumours about 2nd production cause of missing warranty replacements, maybe they used lower quality units just to get production cheaper (and hell, i waited long enough for replacement, so i guess this one could be true)

the other thing is, and i guess that even you can overclock to higher clock than 850,why can everyone here, clock higher but my factory brand new phone can not? anyone ever experienced this?

same here for me.
it works great at 900mhz and the lv profile.
but all other profiles/frequencies make my phone very unstable.
but after a full pr1.3 flash the 900mhz are fast as hell

Running the power kernel with that settings now and the device is not rly idling anymore since PR1.3.
Should I change something with SmartRefllex ?

Nokia-N900:~# kernel-config show
current kernel configuration:
current frequency: 900
supported frequencies: 125 250 500 550 600 700 750 805 850 900 950 1000 1100 1150
min. frequency: 250
max. frequency: 900
avoid frequencies: 125
active frequencies: 0:22,90 250:30,180 500:33,360 550:33,400 600:36,430 700:42,430 750:44,430 805:47,430 850:48,500 900:52,500 950:54,500 1000:58,500 1100:63,520 1150:69,520
SmartReflex VDD1=0, VDD2=0
governor ondemand: ignore nice load= 1, up threshold= 75, sampling rate= 150000, powersave bias= 0

Yes. When you are reading the overclocking docs, pay special attention to the Jakiman intro to overclocking document. He has a chart estimating the percentage of BRAND NEW N900s that will fail at what overclocking speed. You will be interested to note that the percentage of BRAND NEW N900s that fail to overclock at 850 is NOT 0!!

You might be able to learn something about overclocking in the docs.

And that's all they are - rumors, baseless rumors.

Not everyone can, if you check other posts you'll see that. How well your (or anyone else's) device tolerates overclocking, voltage changes, etc. is strictly the luck of the draw. You could have just as easily gotten a replacement that would take whatever you throw at it in stride. You just didn't get lucky with your replacement unit, simple as that.

I have been chatting with Lehto and he apparently runs his at 1100Mhz fixed and noticed that it is much smoother than ever before. (as it doesn't need to scale back down to 250 or 500 speed etc)

So I tried it on my N900 today. Just fixed at 1000Mhz. It's either 0Mhz or 1000Mhz. Using xlv voltage profile with every other supported frequency is in the avoid list. What can I tell ya. It's smoother with less lag than ever before! I'm surprised how responsive my N900 became. I've watched an xvid avi file for like an hour straight and had zero issues still. (my phone never had issues at 1Ghz anyways)

So to those who want that extra responsiveness, try taking out the cpu frequency scaling altogether. (maybe even fixed at 600Mhz or 850Mhz if your phone can't do 1Ghz) I'll bet you will notice it being a little more responsive and lag free. I did. =)

Here is some simple steps I've written up on how to do this:
(I wrote this to cater for beginners also but still with some assumed knowledge)

0. Install an app called "leafpad" from HAM/FAM.
1. Overclock your N900 normally to what you always overclock to.
(will assume that the maximum is set to what you want as fixed)
2. launch xterminal
3. RUN: root
4. RUN: kernel-config min max (where min & max is the desired fixed frequency)
eg. kernel-config limits 1000 1000
4. RUN: kernel-config save my_fixed_oc (or to any other profile name you want)
5. RUN: leafpad /home/user/.kernel/my_fixed_oc
6. From leafpad, we need to edit FREQS line to only show 2 frequencies:
eg. FREQS="0:20,90 1000:60,500 "
(above example means it only allows 0Mhz or 1000Mhz. exact numbers may differ depending on which overclock profile u used. At the end, just ensure you have 2 values in there. 0 and max value you want.)
7. Save and close leafpad.
8. RUN: kernel-config load my_fixed_oc
9. RUN: kernel-config show
(it should show both min and max frequency with same value)
(it should show all other supported frequency in the "avoid frequency" lline)
(it should show only 2 frequencies you set in the "active frequencies" line)
10. You can now use "my_fixed_oc" profile with Queen Beecon Widget etc.

DONE. Now even if you make a phone call etc, it'll still always be locked to max. =)

@jakiman
Which kernel do you use?

Edit:
Is step nr. 6 really necessary? Because when I edit the default kernel setting to

MINFREQ=900
MAXFREQ=900

and keep all other settings?

Im running mine at 1.15Ghz on PR1.3 with Swappolube... Everything is seamless. It honestly feels like it should feel. Opening apps swapping between pages and windows, perfect. Guess im one of the lucky ones

Does anyone here have a good and easy guide about how to overclock the n900? I'd like to overclock my n900 in the best and safest way possible to 900MHz.