CPU speed reading discrepancy
 

http://img231.imageshack.us/img231/3391/123txj.jpg

Bios says : 2681mhz
Windows say : 2914mhz

the system seems unstable...could it be something wrong?

The speed changes depending on load. Run Prime95 and see what it says

Speedstepping is disabled. This is the first time I have seen something like this. =/

You probably are not disabling speed stepping properly. What BIOS setting did you change? There is not one called "speedstepping". All the readings are not stock, so I assume you are OCing. The Windows info screen does not refresh very often, so don't use it.

For my MoBo, you have to disable something else along with Speed Step. I think it was called Halt C1E state or some shit like that

Just run the CPU at full load while checking the speed

Orthos was running...so it's full load.

It could be the cheapo motherboard, temp is not correct as well. I get 3 diff readings

Your original screen shot was taken after Orthos was running for a duration of 8 seconds. It's most likely that you opened CPU-Z before Orthos, so the CPU-Z reading was at a low load. Do you really want us to help you, or do you want us to solve a riddle that you made up? Giving advice to you is a waste of time.

Do us a favor, and post the cause of your problem when you find out. We are interested in learning from your experience.

All that has been suggested is "Speedstepping".