I just finished building a new gaming PC using the M4A89TD mobo w/ a 955BE CPU. I used the Scythe Mugen II HSF instead of the stock cooler, and I'm seeing some issues.
Initially, I booted the machine, and got a sequence of beeps indicating a hardware failure, saw a CPU Fan failure message from the BIOS startup, and noted that the HSF did not spin. I quickly powered down the machine and double-checked all the cabling. Once I had secured everything, I applied power again, making sure to watch the HSF. It started spinning for about a second or two, and then stopped. Once again, I quickly powered down the machine.
I then switched the connections for the CPU fan, which had a 4-pin connector on the board, and the PWR fan (which I was using for a case fan), which also had a 4-pin connector. This time, when I started the machine, the HSF was spinning, but the case fan connected to the CPU fan connector did not spin. I then went into the BIOS and changed one of the power settings for CPU fan from PWR to DC (it basically says to use PWR for 4-pin or DC for 3-pin). The case fan had a 3-pin connector, but the HSF had a 4-pin connector. I restarted again, and the case fan connected the CPU fan connector did spin this time. I powered down again, and switched back, and both fans now seem to work.
This has left me a bit concerned, however, as I now have the HSF with a 4 pin connector connected to the CPU fan connector, but with a BIOS setting that supports a 3-pin fan. It seems to be working, and the idle temp of the CPU is registering around 40 degrees C, which is a bit higher than I’ve read for a lot of people with this HSF but may not be that surprising since my cabling skills are…less than ideal.
Has anyone seen a similar problem to this? Is it expected that the Scythe HSF should be working as if it had a 3-pin connector? Does this sound like a problem with the mobo or the HSF? I’m leaning towards mobo, since I’ve been able to get the HSF to spin with a different power connector.
Any advice would be appreciated. Thanks!
Initially, I booted the machine, and got a sequence of beeps indicating a hardware failure, saw a CPU Fan failure message from the BIOS startup, and noted that the HSF did not spin. I quickly powered down the machine and double-checked all the cabling. Once I had secured everything, I applied power again, making sure to watch the HSF. It started spinning for about a second or two, and then stopped. Once again, I quickly powered down the machine.
I then switched the connections for the CPU fan, which had a 4-pin connector on the board, and the PWR fan (which I was using for a case fan), which also had a 4-pin connector. This time, when I started the machine, the HSF was spinning, but the case fan connected to the CPU fan connector did not spin. I then went into the BIOS and changed one of the power settings for CPU fan from PWR to DC (it basically says to use PWR for 4-pin or DC for 3-pin). The case fan had a 3-pin connector, but the HSF had a 4-pin connector. I restarted again, and the case fan connected the CPU fan connector did spin this time. I powered down again, and switched back, and both fans now seem to work.
This has left me a bit concerned, however, as I now have the HSF with a 4 pin connector connected to the CPU fan connector, but with a BIOS setting that supports a 3-pin fan. It seems to be working, and the idle temp of the CPU is registering around 40 degrees C, which is a bit higher than I’ve read for a lot of people with this HSF but may not be that surprising since my cabling skills are…less than ideal.
Has anyone seen a similar problem to this? Is it expected that the Scythe HSF should be working as if it had a 3-pin connector? Does this sound like a problem with the mobo or the HSF? I’m leaning towards mobo, since I’ve been able to get the HSF to spin with a different power connector.
Any advice would be appreciated. Thanks!
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