The system temps IMO are just a little high. Do you have good airflow thru the case?
Here's what I did with my DFI/Opty machine to achieve 2.5Ghz. Hope this helps.
1. LDT/FSB - I set this to 2.5
2. I locked the PCI-e to 100
3. CPU/FSB - I set this to 9.0 as my processors multiplier is set to 9
4. Disabled anything that I don't need such as, my second LAN, on board audio, additional USB or SATA ports not being used, RAID controls, floppy seek and anything else that I don't need. Disabling these things help the machine boot up slightly faster and also, takes some of the load off the board.
5. I set the RAM divider for 1/1 and set the default timings for my RAM which are 2.5-4-4-8. I did not have the 2.5 option in my BIOS so I set it to 3.
I saved the changes and rebooted the machine to check for stability.
I then went back into the BIOS of the machine and started raising the FSB frequency (multiplier) up about 2-3Mhz at a time. I saved changes and rebooted the machine to check for stability. I ran prime95 and superpi to ensure stability. If the machine is unstable, usually prime95 will let you know of this within the first few minutes of testing.
Once I get to the next Ghz number with the processor, 2.1, 2.2, 2.3 etc., I ran prime for about 8 hours and checked for stability. Once I got to 2.2Ghz, I went ahead and raised the voltage on my RAM to 2.64 volts.
I repeated these steps until prime95 would generate errors which meant, unstable machine. So I backed off the multiplier until it was very stable and ran solid.
A good tool to use is CPU-Z as this will help you keep track of your processor voltage which in my case, I did not have to increase at all, and memory stats.
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