Thank you for contacting the Intel community.
In this case, please bear in mind that Intel does not support overclocking; the support we provide is under the processor specifications. Running the RAM at 3000MHz will be under your own risk if you are interested in doing so, please be aware that your processor will fail sooner or later even though the processor is unlock and can be overclocked.
Now, if you overclock this processor the warranty will be void but you can purchase the Intel® Tuning Protection Plan. The Performance Tuning Protection Plan is an additional plan that a customer can purchase to cover processor failures caused by operating the eligible processor outside of Intel’s published specifications. You can read FAQ.
If you need assistance overclocking your system, you can get assistance at the following link:
NOTE: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
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I sorry, to answer your questions:
What is the effect of running RAM at 3,000MHz on that processor/memory controller?
The effect will be better performance and more speed especially when playing games. For how long? It is hard to tell since it is running out the processor specs. This also depend on your motherboard manufacturer if it supports this frequency.
Should I overclock/upvolt the processor for reliability?
If you overclock/upvolt the processor I’m sure it will have reliability but since it is running out of the processor specs it will start failing at some point, you will experience overheating issues and BSOD when overclock, perhaps not at the beginning but it will start happening sooner or later.
Should I just run the RAM at 2,133MHz?
For reliability and to get better support and a stable system I suggest you to run it either at 2133 MHz or 2400 MHz.
I hope that can help.
Yes, that’s right, the temperature TCASE should be below 64°C or at least at that temperature depending on the system load.
You can also check for this processor specs here:
Please let me know if you need anything else regarding this matter and I will be more then glad to assist you.