Start from nature and take a trip for venture

Steve Mosher steve at qi-hardware.com
Sun Jul 26 16:37:40 EDT 2009


 Overclocking. Man that brings back memories from my days in graphics.

On Thu, Jul 23, 2009 at 7:22 AM, W.G. van de Hulst <suyckerbol at gmail.com>wrote:

> 2009/7/21, Wolfgang Spraul <wolfgang at qi-hardware.com>:
> > PLL Freq       : 366.00 MHz
> > CCLK           : 366.00 MHz
> > HCLK           : 122.00 MHz
> > MCLK           : 122.00 MHz
> > PCLK           : 122.00 MHz
> > LCDCLK         :  73.20 MHz
> >
> > So I thought (my mistake) this means 360 Mhz :-) Wrong!
>
> Or you might be overclocking! Let's compare it to a Skytone Alpha-400
> netbook. It has a jz4730 (336 MHz max) and in fact the Linux kernel on
> THAT machine reports the correct speed:
>
> /proc/jz $ cat cgm
> PLCR1          : 0x5a000520
> CFCR           : 0x0d522220
> PLL            : ON
> NF:NR:NO       : 182:2:1
> I:S:M:P        : 1:3:3:3
> PLL Freq       : 335.46 MHz
> ICLK           : 335.46 MHz
>
> Source: http://projects.kwaak.net/twiki/bin/view/Epc700/CoolGadgetAlpha400
>
> So I would guess the Linux on the jz4720 also reports the correct
> speed. The kernel was perhaps compiled for a jz4740/jz4725.
>
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