Upgraded Processor. Now fan runs full speed and doesn't start sometime

I have a HP z556 Home theatre PC that I put an Intel dg33bu motherboard in. It use to have a Core2duo 2.13GHz processor and I upgraded a couple days ago to an E8500 3.16GHz Core2duo.

Since I've upgraded:

At least one of my case fans is running 100%. With the old processor the same fan would ramp up and down (kind of annoying) but it wasn't as annoying as a fan spinning away at 100%.

When doing a reboot through Windows it doesn't startup. It shuts down but when it tries to start up, the screen stays black. If I hold the power button to shut it off, then press the power button to turn it back on, it starts up fine.

I have the latest BIOS and this processor is supported by this motherboard.

What could the problem be?

I'm mostly concerned with why the machine doesn't startup after a Windows reboot but the fan would be nice to know too.

Thanks!

Thanks for the welcome!!

I already had Speedfan installed but I installed Real Temp 3.70. Here is a screen shot. The GPU cooled down shortly after I took the screen shot and I've read that ICH and MCH are at typical temps.

I didn't change a thing in the bios.

The only other thing that I did in the process was I needed to replace the fan on my video card, so I removed and reinstalled that. Other than that I didn't do anything else with any settings or hardware.

Sorry for the delay. I still haven't gotten a chance to get into my bios.

I don't recall a way to "optimize defaults" in the bios. I've been in there a few times but don't remember anything like that. What do you mean?

When I was using HWInfo, it says that my MB isn't running UEFI bios but is capable. I know it isn't necessary and do not know how to do it yet but do you think it is worth while?

Thanks!

I found Optimize defaults in an Advanced tab and ran it but it didn't fix the issue.