geoffrey Posted June 3, 2013 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
geoffrey Posted June 8, 2013 Posted June 8, 2013 any idea how you can get past the ~1100MHz max clock setting? Is there software that allows more? Quote
Dreadlockyx Posted June 12, 2013 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
xxbassplayerxx Posted June 12, 2013 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
Massman Posted June 13, 2013 Author Posted June 13, 2013 Memory chip might cause issues, I guess. Quote
Dreadlockyx Posted June 13, 2013 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
Massman Posted July 22, 2013 Author 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
Massman Posted July 23, 2013 Author Posted July 23, 2013 JDK8 is the key; over 200% performance boost [hwbot=2405985]submission[/hwbot] Quote
Luebke Posted December 30, 2013 Posted December 30, 2013 (edited) Next week maybe did u already use ln2 on raspberry? Edited December 30, 2013 by Luebke Quote
d3mox Posted December 30, 2013 Posted December 30, 2013 My friend did a vmod on raspberry pi. And hit 1440MHz http://hwbot.org/submission/2473196_ Quote
ogblaz Posted July 4, 2015 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
OC Maximus Posted September 5, 2015 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
kikicoco1334 Posted September 6, 2015 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
Massman Posted September 7, 2015 Author Posted September 7, 2015 Zen1 posted here as well, I believe Quote
OC Maximus Posted September 7, 2015 Posted September 7, 2015 Zen1 posted here as well, I believe I have read his posts but have had no luck on finding vmod pictures. Quote
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