To answer a few of your Questions. I am not familiar with Camtasia. But, if it is like most Video Programs when it comes to rendering, a Higher Clock Speed on the same exact processor almost always means a shorter Render Time. Sometimes its minuscule depending on the Clock Speed increase, but it should never be longer if all other variables are accounted for (Background Processes, Ram Speed, etc...) So It definitely should not be happening that your All Core 4150Mhz OC is faster then your 4375Mhz, 4375Mhz, 4250Mhz, 4250Mhz CCX OC. All 4 of your CCX are above 4150Mhz, so you should be seeing at least a 5% or more increase. I would double check that you don't have some other task going on in the background while you are rendering that wasn't happening when you were doing your rendering on the Old OC. I would also make sure that when testing, you are rendering the same exact project before, with the same exact edits, because depending on the plugins, effects, and transitions that you have in your project, you could have wildly different render times. (For example if its the same project you are rendering, but the first had only a few plugins, while the 2nd you might have added a bunch more, that would definitely effect render times, so it wouldn't be a good "Benchmark" because you are rendering 2 different projects at this point). Also things like Windows Updates, and services like Google Drive or One Drive syncing with the cloud, could all effect your performance if they happen to have been running when you were doing your render, so just do your best to control all variables to make sure that its an apples to apples test between the 2.
If after controlling all variables you are still seeing a render time increase between Overclocks, then its likely that your second OC is not stable. It may be stable enough to finish the render without crashing, but stability isn't just whether or not a CPU Crashes while doing a task, its also that it can perform this task without errors occurring in the CPU, and you may be experiencing errors that are causing the program to recalculate certain tasks. If this happens, more Rendering programs have a log that will list out errors, so if Camtasia has such a log you may be able to check it to see if errors popped up in your recent render that did not pop up in your older render, and then you dig deeper into the error details to find out if it is indeed OC Related.
And last, your Ram could also have a huge effect. So if you were rendering with a higher Ram Speed or Tighter Timings before, and then either you lowered that Ram Speed, or Lowered the Timings with the New OC, that absolutely will have an effect on the Render Times. I know that
was saying that there is some kind of Ram Auto Timing Bug with this newest BIOS Update. If it turns out that this bug he is talking about has to do with the Motherboard setting higher Timings For the same XMP/DOCP Profiles then it was setting in the Old Bios, then that too could also account for your performance loss, even if you were setting the same DOCP Profile. This is because that XMP/DOCP Profile only includes Ram Timings for the Primary Timings, and then One or 2 Secondary Timings. All Other Secondary and Tertiary timings are up to the Motherboard to fill in, and if it is setting much higher Timings then it was before, that could account for a decrease in performance, and depending on how dependent a task is on memory, it could be a pretty substantial decrease in performance. Rendering can be a pretty Ram dependent task, so its also possible this is what you are seeing.
If this does turn out to be the issue, you can easily account for this by downgrading back to the old BIOS, putting in the Same DOCP Profile, booting to Windows, and then using the Timing Checker Tool to Write down all of Your Timings that the Ram is at. Then upgrade the Bios again, and manually dial in all of those timings yourself in the new bios instead of selecting DOCP, you manually select the Ram Speed, Manually input the DRAM Voltage, and then go into the Timing Section of the Bios and One By One enter in each Timing. Then You will have the same exact Ram Performance that you had before, and if this was indeed the reason for the performance drop, it will now be fixed, and now you can see the true performance increase from the Per CCX OC.
Anyways, I hope that helps.
To address your other question, that CCX OC that you set looks great! You can definitely tune it further, but if its stable and it gives you a performance Increase over your old OC that you are happy with, and its not burning up your processor, then that is really all that matters! Enjoy!