Why doesn’t my cpu fan never spine faster than 1500 RPM?

I’ve Intel Pantium 5 3GHZ…Once i look on the device supervisor, I come across two processors….

so I’ve two doubts…

Why does someone find a pair of CPUs within my device manager, and is the speed from the cpu supporter Okay…

i have got an intel P4 THREE.4ghz processor chip.it functions hyperthreading technology in order that it acts seeing that 2 cores available as one.but their actually YOU core.this cpu usually runs hot therefore , the stock intel heatsink as well as fan need to be ok.and yea it’d never truly spin most of that rapidly.i switched to a zalman heatsink as well as fan but it spins upon idle in 1700 rpm and arises from presently there and runs really cool.