Here are the files. While I was at it, I went up to 1.8 GHz (but I’ve only tested to 1.5 GHz, so try those higher clock rates at your peril). I’ve also dimmed the blue LED to something a little less blinding.
https://www.w6rz.net/u-boot-1200mhz.itb
https://www.w6rz.net/u-boot-spl-1200mhz.bin
https://www.w6rz.net/u-boot-1400mhz.itb
https://www.w6rz.net/u-boot-spl-1400mhz.bin
https://www.w6rz.net/u-boot-1500mhz.itb
https://www.w6rz.net/u-boot-spl-1500mhz.bin
UPDATE: From user feedback, it seems the Unmatched does not work above 1.5 GHz.
https://www.w6rz.net/u-boot-1600mhz.itb
https://www.w6rz.net/u-boot-spl-1600mhz.bin
https://www.w6rz.net/u-boot-1700mhz.itb
https://www.w6rz.net/u-boot-spl-1700mhz.bin
https://www.w6rz.net/u-boot-1800mhz.itb
https://www.w6rz.net/u-boot-spl-1800mhz.bin
sudo dd if=u-boot-1500mhz.itb of=/dev/mmcblk0p14 bs=4k oflag=direct
sudo dd if=u-boot-spl-1500mhz.bin of=/dev/mmcblk0p13 bs=4k oflag=direct
I’m using these stress-ng tests. This one is supposed to raise the temperature as much as possible.
stress-ng -v --matrix 0 -t 10m
This one is a memory test.
stress-ng --vm 1 --vm-bytes 4G --verify -v -t 10m
The -t 10m parameter runs the test for 10 minutes. You can increase that or even use -t 8h for an eight hour overnight test.