Normal
The XT140 also has an minor audible whoosh at its lowest RPM. AI Suite reports the minimum operating RPM of ~850 RPM at 40% fan speed but it won't allow me to set it below 47% fan speed which is ~950 RPM.[SPOILER] [/SPOILER]Right now I've turned the case fan off until the CPU hits 50C. This effectively makes the system silent as the CPU fan (under 50% fan speed) is inaudible over the surrounding ambient noise and the video card also has a fan auto-off feature. CPU temperatures rise a little into the mid-to-upper 30s which is no big deal.
The XT140 also has an minor audible whoosh at its lowest RPM. AI Suite reports the minimum operating RPM of ~850 RPM at 40% fan speed but it won't allow me to set it below 47% fan speed which is ~950 RPM.
[SPOILER] [/SPOILER]
Right now I've turned the case fan off until the CPU hits 50C. This effectively makes the system silent as the CPU fan (under 50% fan speed) is inaudible over the surrounding ambient noise and the video card also has a fan auto-off feature. CPU temperatures rise a little into the mid-to-upper 30s which is no big deal.