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overclocking

Posted: Mon May 14, 2012 5:52 pm
by le4thab
i have applied the overclock via editing config.txt i had this running at 800mhz for 24h+ and decided to go a bit futher.i set arm_freq=800 to read arm_freq=1000 and have had no problems at boot and is happly downloading torrents as we speak,i was wondering if there is any way of actualy reading the frequancy of the processor while running?
i would like to know this because i wouldnt have thought a 200mhz oc would be achievable without more power?
i could be wrong tho :D
James

Re: overclocking

Posted: Mon May 14, 2012 6:15 pm
by spennig
cat /proc/cpuinfo
Processor : ARMv6-compatible processor rev 7 (v6l)
BogoMIPS : 898.66
Features : swp half thumb fastmult vfp edsp java tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xb76
CPU revision : 7

Hardware : BCM2708
Revision : 0002
Serial : 00000000afee811b

Bogomips sort of equates to Mhz.

Re: overclocking

Posted: Mon May 14, 2012 6:24 pm
by le4thab
thanks for the reply.it looks like the oc did not take for some reason!is showing a number just below 700 :o

Re: overclocking

Posted: Mon May 14, 2012 7:40 pm
by dom
From the Pi can you show output of:
cat /boot/config.txt

Re: overclocking

Posted: Mon May 14, 2012 8:37 pm
by le4thab
i couldnt see the file specified i then ran cd /boot then ls -F and it says the file is config.txt.txt (notice the secont .txt extention). am i right in thinkin i cannot rename this file and expect it to take effect on the fly?

Re: overclocking

Posted: Mon May 14, 2012 8:46 pm
by le4thab
update...
1000mhz isnt liked by the pi but 900mhz seems fine will continue to test the limits of overclocking without overvolting when transfer of files and torrents done (noob error,i resized the 16gb sd card with debian and started to download a few torrents but forgot to point transmission to the 32gb flash drive and then left pi running!couldnt understand why torrents had stopped! :o )

Re: overclocking

Posted: Tue May 15, 2012 1:45 pm
by Gert van Loo
It does not run standard at 200 MHz. The default frequency is 700MHz. So at 1000MHz you are overclocking by a factor 1.4, not a factor 5.

Re: overclocking

Posted: Tue May 15, 2012 1:56 pm
by xtramural
Gert van Loo wrote:It does not run standard at 200 MHz. The default frequency is 700MHz. So at 1000MHz you are overclocking by a factor 1.4, not a factor 5.
I think the OP meant the difference between 800MHz and 1000MHz.

Re: overclocking

Posted: Tue May 15, 2012 4:39 pm
by le4thab
this is correct,i meant a 200mhz overclock (from 800 to 1000)