# A04 /proc/cpuinfo only showing 2 cores (should have 4) **URL:** \ **Category:** DevTerm\ **Created:** [January 6, 2022, 10:13pm UTC](https://forum.clockworkpi.com/t/a04-proc-cpuinfo-only-showing-2-cores-should-have-4/7828 "2022-01-06T22:13:29Z")\ **Posts on this page:** 1\ **Showing post:** 20
**Author:** ![adcockm](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/adcockm/32/1664_2.png) [@adcockm](https://forum.clockworkpi.com/u/adcockm)\ **Post date:** [January 15, 2022, 4:39am UTC](https://forum.clockworkpi.com/t/a04-proc-cpuinfo-only-showing-2-cores-should-have-4/7828/20 "2022-01-15T04:39:02Z")
I’m not sure what, if anything is under the fan. I was kinda hoping the ClockworkPi folks would provide the improved heatsink solution they posted, but I guess it’s on us to source the materials. I’m not a hardware guy so I don’t have this kind of stuff lying around, and it looks like the only way to purchase most of it is in quantities unneeded for this solution. > [@DIY a Graphene Cooling System for DevTerm](https://forum.clockworkpi.com/t/diy-a-graphene-cooling-system-for-devterm/7825): > > You can make a very effective passive cooling system for your DevTerm, if you have access to these three materials: Graphene sheet, Copper foil tape, and Thermally conductive sheet. Tested on A06 and A04 Cores, CPU temperature lowered by about 10 degree Celsius. [https://github.com/clockworkpi/DevTerm/raw/main/Clockwork\_DevTerm\_DIY\_Graphene\_Heat\_Sink.pdf](https://github.com/clockworkpi/DevTerm/raw/main/Clockwork_DevTerm_DIY_Graphene_Heat_Sink.pdf) I probably need to ask a friend with a 3D printer to get the fan shroud made as well, since I don’t have a 3D printer and it seems silly to use a paid online service for something so simple. While the DevTerm hardware is powerful, it’s a shame it can’t actually be used to its full potential (or even near its potential) without such modifications. So far I’ve been too afraid to run with all the CPUs on, and I’m kinda glad I’ve been overly careful based on your picture. ☹ --- _[View the full topic](https://forum.clockworkpi.com/t/a04-proc-cpuinfo-only-showing-2-cores-should-have-4/7828)._