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ram_temp: add jc42 for DDR4 #1945

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ram_temp: add jc42 for DDR4
morph027 Jan 15, 2026
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morph027 Feb 17, 2026
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4 changes: 2 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -439,7 +439,7 @@ Parameters that are enabled by default have to be explicitly disabled. These (cu
| `procmem`<br>`procmem_shared`, `procmem_virt`| Displays process' memory usage: resident, shared and/or virtual. `procmem` (resident) also toggles others off if disabled |
| `proc_vram` | Display process' VRAM usage |
| `ram`<br>`vram` | Display system RAM/VRAM usage |
| `ram_temp` | Display RAM temperature (only supports DDR5 with `spd5118` driver) |
| `ram_temp` | Display RAM temperature (only supports `jc42` (DDR4) or `spd5118` (DDR5) drivers) |
| `read_cfg` | Add to MANGOHUD_CONFIG as first parameter to also load config file. Otherwise only `MANGOHUD_CONFIG` parameters are used |
| `reload_cfg=` | Change keybind for reloading the config. Default = `Shift_L+F4` |
| `resolution` | Display the current resolution |
Expand Down Expand Up @@ -686,7 +686,7 @@ Example output:
#### Intel notes
- GPU temperature for `i915` requires **linux 6.13+**
- Fan speed for `i915` requires **linux 6.12+**
- GPU temperature and vram temperature for `xe` requires **linux 6.15+**
- GPU temperature and vram temperature for `xe` requires **linux 6.15+**
- Fan speed for `xe` requires **linux 6.16+**
- GPU usage and memory usage shows usage of current process, not total system usage (it's an issue on intel's side)
- https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14153
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3 changes: 2 additions & 1 deletion src/memory.cpp
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Expand Up @@ -43,7 +43,8 @@ void update_mem_temp() {
std::string path = "/sys/class/hwmon/";
auto dirs = ls(path.c_str(), "hwmon", LS_DIRS);
for (auto &dir : dirs) {
if (read_line(path + dir + "/name") == "spd5118")
const auto name = read_line(path + dir + "/name");
if (name == "spd5118" || name == "jc42")
mem_temp_files.emplace_back(path + dir + "/temp1_input");
}
if (mem_temp_files.empty())
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