# Rpi-4 rev 1 ...2.3 Ghz o/c **URL:** \ **Category:** Raspberry Pi\ **Created:** [30 October 2020 05:28 UTC](https://forum.core-electronics.com.au/t/rpi-4-rev-1-2-3-ghz-o-c/8703 "2020-10-30T05:28:28Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![brian86770](https://avatars.discourse-cdn.com/v4/letter/b/c5a1d2/32.png) [@brian86770](https://forum.core-electronics.com.au/u/brian86770)\ **Post date:** [30 October 2020 05:28 UTC](https://forum.core-electronics.com.au/t/rpi-4-rev-1-2-3-ghz-o-c/8703/1 "2020-10-30T05:28:28Z")
since solving my usb issue had some time to play around i have these products on my rpi-4 board 1: argon 1 fan hat 2: [Raspberry Pi 4 Heatsink | Pimoroni | Core Electronics Australia](https://core-electronics.com.au/pimoroni-raspberry-pi-4-heatsink.html) 3: [ModMyPi 40 Pin Extra Tall Header (Push Fit Version) | Core Electronics Australia](https://core-electronics.com.au/modmypi-40-pin-extra-tall-header-push-fit-version.html) i edit the config.txt file set arm\_freq=2250 set over\_voltage=9 bumped power supply to 5.2 volts at the regulator output have not checked the board voltage i`m assuming now it`s getting at least the required 5.1 volts cable length is approx 30 cm at 18 gauge my cpu is sitting pretty stable so far at 2300 also from the panel i added the temp meter… its hovering around between 36 and 45 deg`s i`m only browsing atm and only have this window open … at first it hung but i then adjusted my power supply…it has made the difference getting it running so far… i checked the cpu speeds with command line code and yes verified 2300… every time… > cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo\_max\_freq > this reads the code from the config.txt basically.or what the cpu max factory setting may be…and is not indicative of current cpu speed/s The real time speed is this line of code…from what i have found to be truest…shows all four cores as well at the same time…for checking cpu-freq… cat /sys/devices/system/cpu/cpu\*/cpufreq/scaling\_cur\_freq EDIT: i now have about 10 or so open browsers and the temp is up to 43 degs… i have seen so far …but soon drops back down to around 38-39… i have the fan hat working but will not start up after shutdown via the switch…and trip point speeds can be changed by editing the config file in the /etc directory. ---
**Author:** ![Mitchell](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/mitchell/32/3564_2.png) [@Mitchell](https://forum.core-electronics.com.au/u/Mitchell)\ **Post date:** [3 November 2020 00:06 UTC](https://forum.core-electronics.com.au/t/rpi-4-rev-1-2-3-ghz-o-c/8703/2 "2020-11-03T00:06:59Z")
Hey Brian, Good to hear! Sounds like you are making progress! ---
**Author:** ![brian86770](https://avatars.discourse-cdn.com/v4/letter/b/c5a1d2/32.png) [@brian86770](https://forum.core-electronics.com.au/u/brian86770)\ **Post date:** [10 November 2020 19:16 UTC](https://forum.core-electronics.com.au/t/rpi-4-rev-1-2-3-ghz-o-c/8703/3 "2020-11-10T19:16:21Z")
depending on ambient room temp makes a difference as well with summer here it sits better at 2100