I upgraded my Core i9 HP Z4 G4 workstation with an XFX Swift RX 9070 XT, but the compact case now gets noticeably loud under gaming loads. I initially suspected that hot air from the graphics card was blowing directly onto an M.2 drive installed in the PCIe slot beneath it, causing the workstation's fans to ramp up. I tried a -75 mV undervolt and a custom GPU fan curve, but the fan noise didn't seem to match the GPU's reported fan speed. GPU temperatures only reach about 60°C under load, and the SSD does not appear to be the source of the problem either. I'm looking for practical ways to redirect the GPU's exhaust or improve airflow, such as a compatible shroud, blower, auxiliary fan, or another solution. Since the Z4 G4 uses a proprietary motherboard and case layout, moving the system into a standard ATX case may not be realistic.
2 Answers
First, check the actual M.2 temperature while the GPU is under full load. The SSD is unlikely to be responsible, though, since it typically uses only around 10 watts and shouldn’t produce enough heat to make the main cooling system ramp dramatically. It’s more likely that the workstation’s thermal sensors or restricted case airflow are triggering the fans.
The unusual HP chassis is probably the main limitation. A high-power modern GPU can overwhelm the stock airflow path, and there may not be a purpose-built exhaust shroud or compatible blower for that layout. Try temporarily running with the side panel removed, improving the intake and exhaust fans if possible, and checking whether the noise changes. If that makes a major difference, the case airflow is the issue rather than the SSD.
That makes sense, but the Z4 G4 uses a proprietary motherboard and case design, so transferring it to a normal ATX case probably isn’t a straightforward option.
I checked further and the SSD isn’t the cause. I also can’t find a temperature reading in HWiNFO that explains the fan ramping; the system components remain surprisingly cool during gaming, including the GPU at roughly 60°C.