this is baaad. this chip has both i2c and ability to vary speed, but...
1. Speed is selected from the list of four predefined values.
2. Speed is selected by reading pins 12, 16 and 53 during power-up(pin 10 is low) and can't be changed later.

However, noted pins change their behavior when clockgen finishes initialization, so they shouldn't(at least not all of them) be just soldered to the ground or +.
Probably they are connected to the embedded controller(large ENE chip near cardreader) somehow, but there are almost no chances to determine details without help from asus.

there is also a small chance that changing clockgen register values on started system will make any difference, though doc makes it clear -- these are read-only.

Last edited by dci (2008-01-23 5:22:52 am)

Part number: CY28442

Timming Circuits
   -> Clock Generators
 
Description: system main clock generator
The CY28442 combines a system main clock generator-designed to generate all frequency and timing signals-with a spread-spectrum clock generator, a requirement for an Alviso-based notebook PC. The device supports all the timing requirements for the processor, memory controllers, graphics, USB, Serial ATA and PCI Express. The CY28442 integrates state-of-the-art programmable spread-spectrum technology to help reduce EMI across the entire system and designers to select multiple combinations of processor frequency and spread-spectrum clocking features through the I2C programmable interface
 
Packaging information:

CY28442     

Download datasheet:
http://www.chipcatalog.com/Datasheet/F9 … 7E99C9.htm

el_walto wrote:

What is the default FSB on the EEE2G?

Can anyone(with windows on their EEE) test to see if the following also happens on the 2G?
<I>
When choosing Power Scheme "Max Battery" under Power Options, my Eee reduces the FSB automatically:

Battery Level <50%, Bus Speed 61MHz, CPU Speed 549MHz
Battery Level <40%, Bus Speed 47MHz, CPU Speed 423MHz
Battery Level <30%, Bus Speed 41MHz, CPU Speed 369MHz

From full battery up to 50% the Bus Speed remains at 70MHz.
OS: Windows XP Pro SP2 full updates
</I>




Could i just tie pin 53 and 12 high, and pin 16 low? That would set the chip at 100mhz. But 100mhz looks like the lowest the chip goes at...

Does anyone know how to set this chip to "testmode"? Can it be done by changing states on pins?

Tested, and the same happens on my 2G Surf, although the FSB only goes as low as 50Mhz when battery is down to 10%

Yea :-(

Gotta be someway to overclock it !

I went through the process of changing my FSB using the eee.ko module in another thread - which I don't think was appropriate since I have a 2G. However, running "cat /proc/cpuinfo" it would show that I was running at 800MHz. I did notice a huge difference when trying to run a 720p MKV file - seemed much faster.

So, I think the 2G can be "overclocked" at least to 800MHz, but I'm fairly sure I didn't do it all in a proper way.

<-- Linux noob

2g Surf XP here...willing to test as well.


Ive just contacted ASUS on the matter...truly an act of desperation.

Dear all,
I bought a eeePC 2G surf during the first week of March in UK.

With Xandros, "cat /proc/cpuinfo" shows 800.0 MHz frequency
Then I installed eeeXubuntu, and "cat /proc/cpuinfo" shows 571 MHz.

Some tests with "mprime" (http://www.mersenne.org/freesoft.htm) give me:

[Xandros]
Timing 14 iterations at 512K FFT length.  Best time: 225.511 ms.
Timing 11 iterations at 640K FFT length.  Best time: 282.119 ms.
Timing 10 iterations at 768K FFT length.  Best time: 354.422 ms.
Timing 10 iterations at 896K FFT length.  Best time: 432.027 ms.
Timing 10 iterations at 1024K FFT length.  Best time: 499.506 ms.
Timing 10 iterations at 1280K FFT length.  Best time: 661.626 ms.
..

[eeeXubuntu]
Timing 14 iterations at 512K FFT length.  Best time: 245.262 ms.
Timing 11 iterations at 640K FFT length.  Best time: 308.490 ms.
Timing 10 iterations at 768K FFT length.  Best time: 396.485 ms.
Timing 10 iterations at 896K FFT length.  Best time: 469.281 ms.
Timing 10 iterations at 1024K FFT length.  Best time: 541.849 ms.
Timing 10 iterations at 1280K FFT length.  Best time: 717.554 ms.
...


Comments?
Mic

P.S. Do not use "eee.ko" v0.2 on the 2G Surf version, it is completely useless.

Dear bulltza,
you are correct. But that won't help with the performance.

Cheers,
Mic

Hi,
     New member here, Also regretfully purchased a 2g surf 8(.......Wish I would have read up more first. Im running XP And also willing to test as needed..And even a permenent hardware clock to a normal 800Mhz would be a godsend.

Hi All,

           I know nothing about overclocking, but found this while playing with bluetooth on my 2g:

/home/user> dmesg
.
.
.
[   75.774100] p4-clockmod: P4/Xeon(TM) CPU On-Demand Clock Modulation available
.
.
.

Does this mean anything to those in the know?


Kindest regards

James

manontheedge wrote:

Btw, I'm happy for my 2g to be a test subject.

Me too.
After a few months, its really started to get to me!
After installing apps, the machine just seems laggy, we need to speed the thing up a bit !

gtisingh wrote:

After installing apps, the machine just seems laggy, we need to speed the thing up a bit !

Well, you decided to install Windows, so what did you expect? ;-)