What i3 do you have now?
I3 comes in many generations, and no longer means what it used to, namely 2 cores plus hyperthreading.
It sounds like your process is largely single threaded.
What is the app you are using?
If your app can fully utilize multi threads then the answer will differ.
Modern 11th gen intel processors have improved performance per clock.
Knowing what you have now will allow us to determine the amount of processing improvement that is available.
How large are the files that you will process?
Can the entirety be held in ram, or must it be read from a drive?
If it can be held in ram, then buy sufficient ram.
And, buy faster ram.
Fancy ram with RGB Bling will cost more and perform no better than standard ram.
When buying ram, do not buy individual sticks.
The ram performance specs are only warranted for the capacity of the single kit.
Buying two identical part numbers is a mistake. It may not work properly.
Buy only a single matched kit. Buy the capacity you need up front.
If you later need more ram, plan on selling the old in favor of a single new kit.
The ram you mentioned is nothing special at 2933 speed and cas 17
You can, for example buy a 2 x 16gb ddr4 4000 speed kit for $180
https://www.newegg.com/g-skill-32gb-288-pin-ddr4-sdram/p/N82E16820374107?quicklink=true
Cpu overclocking is no longer a way to get something for nothing.
Processors are binned and the better chips are used in better performing processors.
Today, the I9-11900K is the fastest processor around that uses integrated graphics.
It sells for $550 or so. It will turbo up to 5.3
https://www.newegg.com/intel-core-i9-11900k-core-i9-11th-gen/p/N82E16819118231?quicklink=true
Overclocking can improve performance if you can fully utilize all 16 threads.
But otherwise, it is best and easiest to let the turbo mechanism use turbo which gives top performance to a few cores.
To get max turbo, you do need a good motherboard as well as a good cooler.
Many will recommend a 360 aio cooler, and they might be right from a performance point of view.
But not from a noise point of view.
I do not like liquid coolers if you can avoid it.
FWIW, I use a i9-11900KF and a noctua NH-D15s and have no heat issues.
I have a discrete graphics card so I did not need the integrated graphics.
I would still have bought the K if it had been available at the time.
For an easy to use case, look at the Coolermaster HAF XB
https://www.newegg.com/black-cooler-master-haf-series-atx-desktop/p/N82E16811119265
I needed limited depth for my location.
It has room for two dvd drives as well as two front removable drive enclosures.
Very few top end cases are going to include dvd drive slots.
On the motherboard, plan on a Z590 chipset.
It is an update to the z490 and, with an 11th gen processor, it can handle a m.2 ssd at pcie4 speeds.
I used an ASROCK Z590 extreme.
https://www.newegg.com/p/N82E16813157982
It works well enough, but I suspect there are others that will perform a bit better, Of course, at a higher price.
There are only 3 MATX Z590 motherboards available now, and I would consider them as mid range. Since case size is not an issue for you, stick with ATX.
On storage, ssd performance at the pcie 4.0 rate is available on one device.
Make it count if this is important to you.
I buy only Samsung ssd devices. They are arguably the most reliable around.
Others are cheaper, but a bad ssd is a hard thing to work around.
A samsung 1tb 980 PRO is around $250.
I would think, though, if budget is an issue that a 980 or 970 evo+ at half the price would work about as well.