Massman 258 Posted May 30, 2013 Tips would come in handy Share this post Link to post Share on other sites
richba5tard 388 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 Share this post Link to post Share on other sites
richba5tard 388 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. Share this post Link to post Share on other sites
geoffrey 10 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 Share this post Link to post Share on other sites
xxbassplayerxx 329 Posted June 4, 2013 Anybody try LN2 on these things yet? Share this post Link to post Share on other sites
richba5tard 388 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. Share this post Link to post Share on other sites
geoffrey 10 Posted June 8, 2013 any idea how you can get past the ~1100MHz max clock setting? Is there software that allows more? Share this post Link to post Share on other sites
bob80 10 Posted June 9, 2013 I'm very curious, Pieter, keep us updated Share this post Link to post Share on other sites
Dreadlockyx 10 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. Share this post Link to post Share on other sites
GENiEBEN 10 Posted June 12, 2013 It will suck on cold Share this post Link to post Share on other sites
xxbassplayerxx 329 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? Share this post Link to post Share on other sites
Massman 258 Posted June 13, 2013 Memory chip might cause issues, I guess. Share this post Link to post Share on other sites
Dreadlockyx 10 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. Share this post Link to post Share on other sites
Massman 258 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. Share this post Link to post Share on other sites
Massman 258 Posted July 23, 2013 JDK8 is the key; over 200% performance boost [hwbot=2405985]submission[/hwbot] Share this post Link to post Share on other sites
Luebke 10 Posted December 30, 2013 (edited) Next week maybe did u already use ln2 on raspberry? Edited December 30, 2013 by Luebke Share this post Link to post Share on other sites
d3mox 10 Posted December 30, 2013 My friend did a vmod on raspberry pi. And hit 1440MHz http://hwbot.org/submission/2473196_ Share this post Link to post Share on other sites
richba5tard 388 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 Share this post Link to post Share on other sites
ogblaz 10 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 Share this post Link to post Share on other sites
OC Maximus 10 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 Share this post Link to post Share on other sites
kikicoco1334 10 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! Share this post Link to post Share on other sites
Massman 258 Posted September 7, 2015 Zen1 posted here as well, I believe Share this post Link to post Share on other sites