Extra CPU? You mean extra RAM (based on the rest of you post)
So, short answer: it seems your existing RAM and the new one are almost the same, thus compatible, but the new one just has funny LEDs on it to illuminate your PC.
RGB (Red Green Blue) RAM just means that the RAM had pretty LEDs for shining with colors. It says nothing about the technology, speed, latency etc of the RAM.
XMP is a technology to optimize RAM speed (a bit). If you never activated it in your BIOS you never used it. Your RAM is used in a standard manner.
Your new RAM will also used in a standard manner in this case.
If you activated XMP, both old and new RAM will be used to the best possible way by your BIOS. It's visible on benchmarks. In every day practice, it won't be visible most of the time. It can be on extremely RAM-demanding applications.
So, ATM, you have on your MB, if I look at the old posts (21 Jun 2020 12:41 PM GMT)
"Corsair Vengeance RGB Pro - Kit de Memoria Entusiasta 32 GB (2 x 16 GB), DDR4, 3200 MHz, C16, XMP 2.0 179€"
That's it or not?
If it's the case, it seems that what you want to add is almost the same model. So there should be no issue. The only difference I can see is that the model got flashy colors LEDS. They don't affect performance.
Corsair Vengeance RGB PRO - Módulo de Memoria de Alto Rendimiento, 32 GB (2 x 16 GB), DDR4, 3200 MHz, C16 XMP, 2.0 RGB LED Iluminación
Now the details.
There are 2 main things about RAM:
speed and
latency.
Speed is about how fast data travels. This is what the "XMP" is about.
A DDR4-3200 RAM can do 3,200 million transfers (3,200,000,000) per second, etc. (This corresponds to a frequency of 3,200MHz which is another way to express RAM speed.)
Latency refers to the time the RAM needs to access a specific data stored and to make it available. A C16 RAM needs 16 clock cycles to find data.
Let's say that, if RAM was a librarian, latency is how long it takes the Librarian to find a book on the shelves, and speed is about how fast the librarian can run to bring the books to you once he has found them.
So about speed and XPM:
XMP -Extreme Memory Profile- is a technology that allows the RAM to be used at its best regarding speed, instead of just using an industrial pre-set speed. The pre-set values are standardized speeds that all memory manufacturers adhere to: it’s the DDR4-2133, DDR4-2400, DDR4-2666, DDR4-3000, etc. you see on catalogs. (This standard is called "JEDEC".)
To use XMP, you need to have a CPU, a motherboard, and of course RAM all designed to use this technology. It will be specified in technical info docs. Normally, most recent equipment's, except basic or some middle-range ones, will be compatible with XMP.
BUT MOSTLY, to use XMP, you need to have manually enabled it in the BIOS.
If XMP was not enabled (or your equipment not compatible with XMP), then your XPM RAM will just work as a non-XMP RAM, at the standardized speeds like DDR4-2133 etc. The "best" speed is usually picked by your BIOS automatically.
Using the fined-tweaked XMP over JEDEC doesn't necessarily translate into significantly better performance, as other things than the speed can vary positively or negatively, such as latency.
But usually it will be a bit better, at least on benchmarks.
So about latency:
C16 is a latency indication. "C" is an abbreviation for CL (Column Latency); "column" being the librarian's shelf where the books (data) are stored.
The number next to the letter C is how many clock cycles it takes to get data. C16 means the RAM takes 16 clocks cycles. You have C15 RAM that takes 15 cycles.
So what in hell should I favor? High speed or low latency?
Believe me, there are even more details... So let's be simple.
To know what the best choice between different RAMs is, divide the speed by the latency.
The higher the result, the "faster" or "better" the RAM.
For example, let's compare a first RAM with a speed of 3333MHz and a C15 latency, and another with 3400 MHz speed and C16 latency.
3333 / 15 = 222
3400 / 16 = 212
222 being the higher result, the first model of RAM (3333MHz /C15) is the best choice in almost all situations. Will you see a difference? Likely not most of the time.