9800 PRO DROPPED MY CPU SPEED???

[mato7742]

i recently installed an ati radeon 9800 pro graphics card on my computer and two days after i was finished adjusting the card i randomly checked "my computer" "properties" and my processing speed has dropped from 1.66 ghz to 1.24 ghz... i also noticed that my over clock switch on the mother board is still turned on... so could anyone tell me wha the problem is and perhaps how to fix it?

 

[pelikan]

Heat issue (thermal throttling)? Psu weak?

 

[hominid skull]

gone from a 133MHz bus to a 100Mhz bus. Up the bus speed.