Differences

This shows you the differences between two versions of the page.

--- hbcm5 [2025/06/06 13:45] – assa
+++ hbcm5 [2025/06/06 14:03] (current) – assa
@@ Line 13: / Line 13: @@
 To choose a working NVMe, it is best to do some research online to see which NVMe has already been confirmed to work with a Raspberry Pi.
-Generally, the NVMe needs to use PCIe. **SATA NVMes will not work!**
+Generally, **the NVMe needs to use PCIe. SATA NVMes will not work!**
 The following NVMes have been confirmed to work:
     * KingSpec NXM-2242 (also available on elecrow)
 NVMes will also work with an appropriate adapter.
+=== Enabling PCIe Gen 3 ===
+By default, the Raspberry Pi will use PCIe Gen 2. You can configure Gen 3 [[os#editing_config.txt|by adding the following line to the ''config.txt'']]:
+<code>dtparam=pciex1_gen=3</code>
+==== Cooling ====
+The HackberryPi CM5 ships with a passive heatsink. It should be adequate for most usage. Temperatures will go up to 70°C, which shouldn't be a problem.
+However, you can install an active cooler with a fan (like [[https://a.co/d/grKWdSR|this one]]). The only requirement is how it mounts to the CM5. The underside of the heatsink should be flush. No stand-offs should be included (they can be removed, with a Dremel if needed). \\
+The following parameters [[os#editing_config.txt|can be added to the ''config.txt'']] to set a fan speed curve:
+<code>
+# Fan is cutting on at 40 degrees Celsius,
+# it is going to drop it by 10 degrees at a fan speed of 200
+# temp=millicelsius
+dtparam=fan_temp0=40000
+dtparam=fan_temp0_hyst=10000
+dtparam=fan_temp0_speed=200
+dtparam=fan_temp1=50000
+dtparam=fan_temp1_hyst=20000
+dtparam=fan_temp1_speed=225
+</code>
+Thanks to Discord user [[https://discord.com/channels/1158055950280826922/1298664686002241648/1379656689145352352|Tripp]] for the parameters!
 ==== Common issues =====
 === CM5 with eMMC ===