Tried both ways. Without overclock it just takes a bit longer to get the error or it happens less frequently but it does happen. The first time it ever happened was without overclock right after noobs finished installing Raspbian, it had a kernel panic. I assumed it was no big deal since the new kernel was just released so it could have been a bug.jdb wrote:Are you running with an overclock in /boot/config.txt?
Date on Barcode is 14/01gsh wrote:Also, is the Made in UK or Made in PRC, are the DSI / CSI connectors white or black and what's the date code on the little 3D barcode on the back?
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pi@Pi2Black ~ $ memtester 500 20 memtester version 4.2.2 (32-bit) Copyright (C) 2010 Charles Cazabon. Licensed under the GNU General Public License version 2 (only). pagesize is 4096 pagesizemask is 0xfffff000 want 500MB (524288000 bytes) got 500MB (524288000 bytes), trying mlock ...locked. Loop 1/20: Stuck Address : ok Random Value : ok Compare XOR : ok Compare SUB : ok Compare MUL : ok Compare DIV : ok Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : setting testing 63^ok Block Sequential : ok Checkerboard : ok Bit Spread : ok Bit Flip : testing 144FAILURE: 0x00040000 != 0x00000000 at offset 0 x032b71fc. FAILURE: 0x00040000 != 0x00000000 at offset 0x0a38a63c. Walking Ones : ok Walking Zeroes : ok 8-bit Writes : ok 16-bit Writes : ok Loop 2/20: Stuck Address : ok Random Value : ok Compare XOR : ok Compare SUB : ok Compare MUL : ok Compare DIV : ok Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : ok Block Sequential : ok Checkerboard : ok Bit Spread : ok Bit Flip : testing 225FAILURE: 0x00000000 != 0x10000000 at offset 0 x07b75340. Walking Ones : ok Walking Zeroes : testing 49
They do.rpiswag wrote:Just wondering don't all pis no matter where there made need to pass a quality control test.
Yes and in exceedingly rare exceptional circumstances a bad device will get through. In that case the RPF really want to discover how that happens so they can enhance the device testing to prevent that in future.rpiswag wrote:Don't all pis (uk and prc) need to pass the same quality control test or is the tests for each Pi different? Does the pis in the uk get more strick testing compared to the ones in the prc. I am confused.
It's my understanding that NO amount of overclocking is guaranteed. Though that was my thinking for all brands, models of CPU / computer systems in general.headamage wrote:...
The only question I have is if the overclocking preset in raspi-config is considered a guaranteed setting with no stability problems. If yes, then I have enough reason to RMA the two boards. If no, then it is just bad luck but I cannot complain nor can I claim defect. Please clarify this!