Massman Posted May 30, 2013 Share Posted May 30, 2013 Tips would come in handy Quote Link to comment Share on other sites More sharing options...
richba5tard Posted May 30, 2013 Share Posted May 30, 2013 Raspberry Pi overclocking 101: 0) download Soft-float Debian “wheezy” at http://www.raspberrypi.org/downloads on an SD card 1) boot your pi and open the config file which contains the cpu frequency: #sudo nano /boot/config.txt 2) edit the line arm_freq=700 to any value between 700 and ± 1150 3) reboot # sudo reboot Benchmarking Download a java 6, 7 or 8 runtime. #sudo apt-get install openjdk-7-jre Download latest HWBOT Prime #wget http://downloads.hwbot.org/hwbotprime.jar And run it! #java -jar hwbotprime.jar Lots of usefull info: http://elinux.org/RPiconfig => memory overclocking, gpu overclocking, etc etc Quote Link to comment Share on other sites More sharing options...
richba5tard Posted May 30, 2013 Share Posted May 30, 2013 FYI, java 7 seems to be 5 to 8% faster than java 6 for the Pi. Did not try java 8 yet. Quote Link to comment Share on other sites More sharing options...
geoffrey Posted June 3, 2013 Share Posted June 3, 2013 (edited) Testing java 6 vs 7, no difference here with the new hwbot version (1.7.1) I see small difference, up to 3% faster with OpenJDK 7: Raspberry-pi @ 700 MHz OpenJDK 6 (1.6.0_27) 155.02 Primes/second OpenJDK 7 (1.7.0_07) 159.76 Primes/second Raspberry-pi @ 1000 MHz OpenJDK 6 (1.6.0_27) 195.50 Primes/second OpenJDK 7 (1.7.0_07) 197.45 Primes/second Edited June 3, 2013 by geoffrey Quote Link to comment Share on other sites More sharing options...
xxbassplayerxx Posted June 4, 2013 Share Posted June 4, 2013 Anybody try LN2 on these things yet? Quote Link to comment Share on other sites More sharing options...
richba5tard Posted June 4, 2013 Share Posted June 4, 2013 Massman has LN2 at the office and a Pi, but he's on computex right now. I'm eager to know what these little buggers can do on LN2. Quote Link to comment Share on other sites More sharing options...
Massman Posted June 8, 2013 Author Share Posted June 8, 2013 Next week maybe Quote Link to comment Share on other sites More sharing options...
geoffrey Posted June 8, 2013 Share Posted June 8, 2013 any idea how you can get past the ~1100MHz max clock setting? Is there software that allows more? Quote Link to comment Share on other sites More sharing options...
bob80 Posted June 9, 2013 Share Posted June 9, 2013 I'm very curious, Pieter, keep us updated Quote Link to comment Share on other sites More sharing options...
Dreadlockyx Posted June 12, 2013 Share Posted June 12, 2013 Even with an adequate cooling system, we would need to vmod the board in order to get high frequencies (I suppose). And for this, I haven't found anything yet. Quote Link to comment Share on other sites More sharing options...
GENiEBEN Posted June 12, 2013 Share Posted June 12, 2013 It will suck on cold Quote Link to comment Share on other sites More sharing options...
xxbassplayerxx Posted June 12, 2013 Share Posted June 12, 2013 Even with an adequate cooling system, we would need to vmod the board in order to get high frequencies (I suppose). And for this, I haven't found anything yet. Well... it is HWBOT. Modding it is a very big possibility. EPower on Raspberry Pi It will suck on cold Is there some stuff on there that can't get cold? Quote Link to comment Share on other sites More sharing options...
Massman Posted June 13, 2013 Author Share Posted June 13, 2013 Memory chip might cause issues, I guess. Quote Link to comment Share on other sites More sharing options...
Dreadlockyx Posted June 13, 2013 Share Posted June 13, 2013 Well... it is HWBOT. Modding it is a very big possibility. EPower on Raspberry Pi Yeah, it should go well with our professional modding skills. Memory chip might cause issues, I guess. Then let's desolder it, put it away with some wire system so that we can cool down the ARM chip. Quote Link to comment Share on other sites More sharing options...
geoffrey Posted June 19, 2013 Share Posted June 19, 2013 good luck Quote Link to comment Share on other sites More sharing options...
Massman Posted July 22, 2013 Author Share Posted July 22, 2013 Been playing a bit with the Raspberry Pi. So far, 212 at 1100/600/550. No idea how to get to 400, though. There seems to be a problem for uploading the file to the hwbot server from the terminal. Not sure if user error or bug. Quote Link to comment Share on other sites More sharing options...
Massman Posted July 23, 2013 Author Share Posted July 23, 2013 JDK8 is the key; over 200% performance boost [hwbot=2405985]submission[/hwbot] Quote Link to comment Share on other sites More sharing options...
Bobnova Posted July 23, 2013 Share Posted July 23, 2013 Aww, my gold cup. Quote Link to comment Share on other sites More sharing options...
Luebke Posted December 30, 2013 Share Posted December 30, 2013 (edited) Next week maybe did u already use ln2 on raspberry? Edited December 30, 2013 by Luebke Quote Link to comment Share on other sites More sharing options...
d3mox Posted December 30, 2013 Share Posted December 30, 2013 My friend did a vmod on raspberry pi. And hit 1440MHz http://hwbot.org/submission/2473196_ Quote Link to comment Share on other sites More sharing options...
richba5tard Posted December 30, 2013 Share Posted December 30, 2013 oooh, awesome! That's the first +100% OC i see! I was just toying around with my raspberry and it seems java now comes shipped with the stock raspbian OS, and it's much faster than before. Performance seems on par with the jdk8 beta optimized for arm. http://hwbot.org/submission/2473395_richba5tard_hwbot_prime_broadcom_bcm2835_585.41_pps Quote Link to comment Share on other sites More sharing options...
ogblaz Posted July 4, 2015 Share Posted July 4, 2015 Can somebody help me get past 1500mhz, start.elf i used from rpi forums doesnt work becouse i have 256mb ram version. I have some of ln2 left and i dont want to leave it to go to waste. PS: I already posted on rpi forums, if i also post here couldnt hurt Quote Link to comment Share on other sites More sharing options...
OC Maximus Posted September 5, 2015 Share Posted September 5, 2015 (edited) Seems like there isn't much action with the Raspberry Pi 2 these days. I built a small pot for some dust off fun but I've seem to hit a wall. force_turbo=1 arm_freq=1140 gpu_mem=50/50 core_freq=500 sdram_freq=500 over_voltage=8 Hwbot Prime Score: 1811 pps http://hwbot.org/submission/2939059_oc_maximus_hwbot_prime_broadcom_bcm2709_1811.29_pps I'm looking for a good vcore vmod. I've done quite a few vmods in the past but it has been a few years. I did find this by Zen1: » Sat Apr 11, 2015 8:08 pm So, I've been working on this project for a while and I just wanted to share my results as there hasn't been much interest in overclocking the BCM2836. Today I managed to overclock my Pi 2 to 1500MHz and I just wanted to share to see if anyone else was interested. I removed L3 and soldered a lead on to the pad nearest C7 so that I could apply a separate core voltage. Using the software overvoltage setting of 8 only brings you up to 1.4V. I used an EVGA epower unit to provide a clean 1.66V. I used liquid nitrogen to cool the chip with a custom made CPU pot I designed. I had to use an extension cable for the SD card as it was getting too cold and I applied a heating pad to the bottom of the board to assist with keeping the RAM warm and defrosting the board. I found the chip coldbugs at -130C and refuses to boot under -90C. I found keeping the ram above 20C helped a lot with booting and stability. So this is just a teaser to see if there is any other interest out there and to see if anybody knows of anyone who has gone further than this. https://www.raspberrypi.org/forums/v...?f=29&t=107149 I've been staring at the schematics of the pi and located the L3 and C7 but am having difficulty replicating the vmod without a good picture of the soldering points. Does anyone have a picture of this? Thanks, OCM Edited September 5, 2015 by OC Maximus Quote Link to comment Share on other sites More sharing options...
kikicoco1334 Posted September 6, 2015 Share Posted September 6, 2015 HAHAHAHA that's freaking awesome dude! keep it up! nice come back and that cooling dude lol just made my day! Quote Link to comment Share on other sites More sharing options...
Massman Posted September 7, 2015 Author Share Posted September 7, 2015 Zen1 posted here as well, I believe Quote Link to comment Share on other sites More sharing options...
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