le4thab
Posts: 52
Joined: Fri Jan 06, 2012 10:55 pm

overclocking

Mon May 14, 2012 5:52 pm

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

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spennig
Posts: 84
Joined: Mon Aug 29, 2011 11:34 am
Location: New Forest
Contact: Website

Re: overclocking

Mon May 14, 2012 6:15 pm

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.

le4thab
Posts: 52
Joined: Fri Jan 06, 2012 10:55 pm

Re: overclocking

Mon May 14, 2012 6:24 pm

thanks for the reply.it looks like the oc did not take for some reason!is showing a number just below 700 :o

dom
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 5398
Joined: Wed Aug 17, 2011 7:41 pm
Location: Cambridge

Re: overclocking

Mon May 14, 2012 7:40 pm

From the Pi can you show output of:
cat /boot/config.txt

le4thab
Posts: 52
Joined: Fri Jan 06, 2012 10:55 pm

Re: overclocking

Mon May 14, 2012 8:37 pm

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?

le4thab
Posts: 52
Joined: Fri Jan 06, 2012 10:55 pm

Re: overclocking

Mon May 14, 2012 8:46 pm

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 )

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Gert van Loo
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Re: overclocking

Tue May 15, 2012 1:45 pm

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.

xtramural
Posts: 108
Joined: Thu Dec 29, 2011 11:16 pm
Location: Scotland

Re: overclocking

Tue May 15, 2012 1:56 pm

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.

le4thab
Posts: 52
Joined: Fri Jan 06, 2012 10:55 pm

Re: overclocking

Tue May 15, 2012 4:39 pm

this is correct,i meant a 200mhz overclock (from 800 to 1000)

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