Hey Vanadiel, How do I know if one I picked out will be good enough for the graphics card.

1.  
2. Intel Core i7-11700K
3.  
4.  
5. Intel Core i9-10900K
6.  

https://vasportscomplex.com/best-cpu-for-rtx-3080-ti/

There are different sites to check bottlenecks, but I tend to use this one the most: Bottleneck calculator 

Just select the CPU, graphics card and your screen resolution, and it will show you how well it will run and if you have a bottleneck.

Do keep in mind that other factors will affect framerates, like memory speed, drive interface, thermals of the CPU, thermals of the GPU etc...

It's a bit system specific, but that site will provide a baseline on the components.

It seems that even with the best CPU on the Alienware list still results in 14% bottlenecking.

Depends on resolution and some other factors like memory transfer speed. Typically higher resolutions cause the bottleneck to shift to the GPU and away from the CPU.

Ok, last question. If I were to buy  Something like this. Would there be any problems? I have a fear of buying things that won't work. And I'm not the brightest at this sort of stuff, so can you just confirm me buying this won't cause any problems?

 Oh okay thankyou, I think I found a good one to use. Hopefully will be getting it soon!

That CPU should work. If your CPU is currently air cooled, an AIO CPU liquid cooler would be advised, and you would also need the VRM heatsinks, if not currently installed.

Ha! Now I just have more questions. I'm pretty confident in my ability to figure this out. If I need anything I'll just ask if that's ok.

ask away . . . it will also help someone else that comes across the same question

I have a quick question: I too wish to upgrade my CPU on my R12 I have an 7-11000 but want to get the 7-13000k. Have looked around and looked the tech specs for the r12 but can’t can’t find anything? Any pointers would be appreciated!! 

lightflight10

Unfortunately 13th Gen Raptor Lake processors will not be supported on your R12. The i9-11900K would be your maximum supported CPU.

Validated OEM CPU =

KX53R i9-11900KF, 3.50GHz, 125W, 8C, 16MB
M5WW1 i9-11900K, 3.50GHz, 125W, 8C, 16MB
0RG88 i9-11900F, 2.50GHz, 65W, 8C, 16MB
X6R70 i9-11900, 2.50GHz, 65W, 8C, 16MB
3FCFJ i7-11700KF, 3.60GHz, 125W, 8C, 16MB
267V6 i7-11700K, 3.60GHz, 125W, 8C, 16MB
533FG i7-11700F, 2.50GHz, 65W, 8C, 16MB
4X3CY i7-11700, 2.50GHz, 65W, 8C, 16MB
7DPH1 i5-11600K, 3.90GHz, 125W, 6C, 12MB
7FCVW i5-11600KF, 3.90GHz, 125W, 6C, 12MB
D4X2Y i5-11400F, 2.60GHz, 65W, 6C, 12MB
CXRG1 i5-11400, 2.60GHz, 65W, 6C, 12MB