Power input (battery/PSU) has nothing to do with "overclocking" the Eee, for some reason my Eee cannot run faster than 750mhz, at 787mhz it crashes after a few minutes and trying to set it to 800 or higher results in an instant crash, the screen blanks and it either it reboots or freezes.

If they put a 900mhz CPU in these things, why are they running them at 630mhz? did they buy reject processors?

I'll start by saying that I'm a software weenie - not a hardware guy.

So, I tried SetFSB and tried to jump in two jumps to 400.  First jump, to 340, basically caused the screen to go bonkers.  Tried again.  Still didn't work.  Tried smaller jump - to 320.  That didn't work.  Tried 300.  Worked!  Then 320.  Worked.  Etc.  The only way for me to get to 400 (and beyond for that matter), is in jumps of 20 (maybe 30 would work as well but 40 didn't).

So for those still having trouble, you might try *even* smaller jumps.
arn

revogsx wrote:

this guide works on my asus eee with winXP pro

bios is 4401, i did the gradual increase to 900mhz and still ok, no crash, screen looks good, no hang on orthos for 1hr

now playing divx for 2hrs while transfering 500mb files via WIFI, still ok for now

btw, my unit is black with webcam, serial 7B, no miniPCIE and still with orig 512MB memory

Thats the same as my unit and I have no problem clocking it to 900Mhz, it sometime crashes if I go straight there but as most people seem to find a brief at stop a 85Mhz, then too 100Mhz works fine every time. I do have a 2Gb PC2 6400 Sodimm in there but it should'nt make a difference.

I did find it a bit flaky with the latest version of SetFSB though (2.18 I think), 2.17 (follow the link in the original post). Also make sure the Ultra box IS NOT checked and your other setting are as defined previously.

Last edited by B0wler (2007-12-09 3:40:54 pm)

JeePea wrote:

This is a message for those who are interested in underclocking their E3's.  I had asked a question about this and I have seen at least on other message with this request.

Walltiger was nice enough to respond to my question about this with a technique he uses to underclock.  First off, I want to give the same caveat that goes along with any advice about this kind of hacking with the FSB.  This is the method that worked for me (and Walltiger), but it may not work for you.  Use at your own risk.

The key to underclocking further than FSB will allow by default, is to go to the Customize menu. (You must retrieve the current settings first.)  Down in the right hand corner is a setting called PLL M.  The default on mine was 24.  Change this to 31.  You will see that the slider that changes the FSB now has more room to the left.  Use this to further underclock the E3.

Some things to consider:  At the lowest setting, your E3 may be unstable.  I found that 500mhz was a nice compromise for me.  Also, just like increasing the FSB, reducing it should be done in increments or it will freeze.  I found that increments of 100mhz seems to work for me.  I set up short-cuts for 500, 600, 700 and 800mhz.  By moving in these incremements, I haven't had any problems.  I also put a shortcut for 500mhz in my start menu as I'm most interested in battery life.

Good Luck
JeePea

Hey how do you set PLL M using command line?

--- edit

Nvm, it remembers by itself. Thanks!

Last edited by Hahutzy (2007-12-09 6:28:57 pm)

Here's what I did:

0)  You need to run setfsb once and select the clock generator

1)  I unzipped setfsb to C:\foo
2)  I read the help file setfsb.txt
3)  I made a shortcut to setfsb.exe by right clicking on it and clicking "Create Shortcut"
4)  I renamed the shortcut speed_900
5)  I opened the properties of speed_900 (right click) and added options to the Target (next line)

      C:\foo\setfsb.exe -w1 -i40 -s399

6) click ok

The options increase the speed in 40MHz increments (i40) with a one second delay (w1) up to an almost 900 Mhz cpu speed(s399).  (The "-i40" option actually increases the bus speed by 10MHz, the ram speed by 40MHz and the cpu speed by 90MHz increments.)

I also have a speed_800 setup as

     C:\foo\setfsb.exe -w1 -i40 -s355

and a speed_633.

This works for me.  It might brick your eee pc.

Last edited by cantstop (2007-12-26 9:16:08 am)

link2057 wrote:

Has anyone overclocked passed 900 Mhz?
Got mine to 957 Mhz. Passed that, it crashes.

Nice.

When I get mine, I'm going to aim for 1GHz.

some of you have good chips.  mine wont even get to 850.  i tried 832 today and it works fine so far.  850 hard locks my comp soon as i start an N64 rom.

mine works at 995MHz too ...

.:Cyb3rGlitch:. wrote:

I don't understand. If the FSB is 100MHz when the CPU is at 900MHz, wouldn't DDR run at 200MHz? What divider are these things using?

From a recent discussion with Rroff I believe the DDR bus speed is 200 MHz (2:1) and so the DDR2 is running at 400 Mhz (100 MHz for the internal memory cells).

Take your FSB/Bus speed frequency, multiply by four, Tadaa your DDR2 Memory Clock.

i.e. 900 Mhz overclocked = 100Mhz x 9 Multiplier
     DDR2 Clock speed = 100Mhz x 4 Multiplier = 400 Mhz


edit: Hope this answers the question on the memory clock of the ram to purchase for those looking to upgrade.  The answer is: it doesn't really matter; go for whatever is cheapest since they are backwards compatible (frequency ratings are the max SAFE frequency which data can be propogated without glitches, data overwrite, or indeterminate values) hence if it can run safely at 667Mhz it sure can run without errors at 400Mhz.

Anyways, the max overclock on these forums is under 1Ghz, so assuming that is the max 1000/9 *4 = 444.4 Mhz. So basically anything higher than that would be sufficient (533Mhz, 667, 800..).  Even the 400Mhz DDR2 is sufficient if you're only looking for 900 Mhz overclock.

That being said, purchasing higher speed rated memory would be more beneficial in being future proof.

Last edited by eyies (2007-12-12 1:03:04 pm)

eyies you've got that wrong

Heres the way the numbers roll

lets say you have DDR2 667

essentially this means the IO bus is 333 and the ram is at 166, but since there are 2 channels for the ram its effectively 333 meaning that DDR2 667 has a max speed of 333, not 667

667 actually refers to the rate data is moved at, since its improved from ddr the data rate at similar speeds is doubled however this is not without sacrafice, but I wount get into that.

http://www.hexus.net/content/item.php?i … direct=yes

here is a better article that explains it...
so yes ram speed does matter.

so following the instructions in this thread for making shortcuts to SetFSB for different speeds I made a few of my own using the speeds i've tested to be stable and that wont crash.  i'd love to be able set my FSB even lower for even better battery power but 591MHz is ok for now.  anyway, here is a screenshot of what i've done...