- Jul 26, 2013
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- 10,510
Under normal conditions, what would trigger an AMD X2 4550e dual core cpu cooling fan to increase from normal to high speed? This question pertains to a stock, low-end Compaq (HP) Presario SR5710F desktop PC that has an ECS MCP61PM-HM (Iris8) motherboard with integrated graphics (nVidia GeForce 6150SE) running Vista Home Premium (32-bit) SP2.
My question is prompted by some unusual behavior I have been witnessing. At what appears to be totally random times, the cpu cooling fan will switch from normal to high speed. In conjunction, the PC will lock/freeze (i.e. it will no longer accept mouse or keyboard input) but processes still appear to be running. The fan will continue to run at high speed until the PC is shutdown via the power button on the case which is the only way to recover. I've monitored the cpu core temps and witnessed the event happen when both were hovering around 30°C. I've run endless hardware diagnostics to no avail. Everything passes. I've run stress tests on everything I could (system, cpu, memory, hard disk, video/graphics) both individually and together as a system stress test and could not induce the cooling fan change in speed. No "new" software was added just prior to seeing this behavior for the first time and there is very limited added software in total on the machine (Google Chrome, AVG Free virus protection). Virus protection was kept up to date.
My question is prompted by some unusual behavior I have been witnessing. At what appears to be totally random times, the cpu cooling fan will switch from normal to high speed. In conjunction, the PC will lock/freeze (i.e. it will no longer accept mouse or keyboard input) but processes still appear to be running. The fan will continue to run at high speed until the PC is shutdown via the power button on the case which is the only way to recover. I've monitored the cpu core temps and witnessed the event happen when both were hovering around 30°C. I've run endless hardware diagnostics to no avail. Everything passes. I've run stress tests on everything I could (system, cpu, memory, hard disk, video/graphics) both individually and together as a system stress test and could not induce the cooling fan change in speed. No "new" software was added just prior to seeing this behavior for the first time and there is very limited added software in total on the machine (Google Chrome, AVG Free virus protection). Virus protection was kept up to date.
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