Hello, I am looking to water cool my entire gaming computer. These are my components now:
 
PCPartPicker Part List
Type Item Price

CPU Intel Core i7-9700K 3.6 GHz 8-Core Processor $363.99 @ B&H
CPU Cooler Corsair H100i v2 70.69 CFM Liquid CPU Cooler $199.87 @ OutletPC
Thermal Compound Thermal Grizzly Kryonaut 5.5 g Thermal Paste $27.97 @ Amazon
Motherboard Asus ROG MAXIMUS XI HERO (WI-FI) ATX LGA1151 Motherboard $281.89 @ OutletPC
Memory Corsair Vengeance LPX 32 GB (2 x 16 GB) DDR4-3200 Memory $159.99 @ Amazon
Storage Samsung 860 Evo 1 TB 2.5" Solid State Drive $129.99 @ Adorama
Storage Inland Premium 1 TB M.2-2280 NVME Solid State Drive $110.99 @ Amazon
Video Card EVGA GeForce RTX 2080 Ti 11 GB XC ULTRA GAMING Video Card $1219.99 @ Amazon
Case Cooler Master MasterCase H500P Mesh ATX Mid Tower Case $179.99 @ Newegg
Power Supply EVGA SuperNOVA P2 1200 W 80+ Platinum Certified Fully Modular ATX Power Supply $247.60 @ Amazon
Operating System Microsoft Windows 10 Home OEM 64-bit $99.89 @ OutletPC
Case Fan Cooler Master MasterFan Pro 140 Air Flow RGB 3 in 1 with RGB LED Controller 53 CFM 140 mm Fans $39.79 @ OutletPC
Monitor Dell S2716DGR 27.0" 2560x1440 144 Hz Monitor $435.00 @ Amazon
 
Prices include shipping, taxes, rebates, and discounts
Total (before mail-in rebates) $3521.95
Mail-in rebates -$25.00
Total $3496.95
Generated by PCPartPicker 2019-10-13 15:25 EDT-0400
 
Gaming for a long time (more then 8 hours) gives me temps of 55 c on the cpu at 5.1MHz at 1.32 volts and 66 c on the GPU. The GPU is not overclocked at this time. I was wanting to know if a kit like this EK FLUID GAMING A360G would work with a water block that I have already ordered from EVGA, EVGA HYDRO COPPER Waterblock for EVGA / NVIDIA GeForce RTX 2080 Ti, XC / XC ULTRA / XC2 / FE, 400-HC-1389-B1, RGB. I have search on the internet and found numerous videos stating not to mix metals. The EK kit is full aluminum and the EVGA block is nickel-plated copper. If this will work great but if it will not, could you recommend a water cooling kit that I would be able to use with the GPU block. I would like to start with soft tubing for now as this will be my first try at water cooling an entire system on one loop.

Cool GTX
Do Not Mix the EK aluminum Kit with the Nickel-plated cooper water block
 
 
Read All the EK Guides
 
 
Give this Thread a look:  Ready to try water cooling. Where to start? Library of links-basics to expert
 
 

Exactly what he said.
 
Why aluminum still exists in the PC water cooling world is the Eighth Wonder. Werent we trying to eradicate it?
 
Stick to nickle plated copper and you are good to go. If you are competent to piece together the components you listed, you will have no problem throwing together a simple custom loop. And good choice with the soft tubing for your first go-around.  Its much more forgiving than hard tubing, and gives you a chance to play with different configurations. Watercool makes some great CPU and GPU full cover blocks. Have fun. Very addictive and can be an expensive habit.
 

Your choice of case is not going to make it easy .. they are not all that big
 
I use many EK block, radiators and parts ... also Alphacool radiators .... it is not hard to build the loop, take your time
 
Find the biggest/ thickest radiators that will fit your case
 
Always do a leak test ... power is Only to your pump
 
design your loop with a drain ... make maintenance much easier
 
There are links in my signature & my Mods Rigs build ... with more details

If I put the Hydro Copper waterblock on a RTX 2080 Ti XC Ultra Gaming, do i need to flash the bios so P1 knows i no longer have any fans on the GPU?

If this is your first watercooled built my personal suggestion is to stick to one brand of components to eliminate any sort of contamination problems and make your loop as maintenance free as possible by using a clear coolant.  Because no matter what anyone tells you , you will learn a lot from your first system and are bound to rethink your plan and dramatically improve making a loop the second time around.  You need to steer clear of the EK aluminum parts unless you intend to use the entire system and treat it sort of like a closed loop aio system.  you can not share any parts from other companies when using aluminum.  Its not a joke you will contaminate your copper components immediately.
 
The second biggest suggestion I can make if to have a mother board that has water temp probe headers. and to add 2 probes into your plumbing.  You will only need one of the probes but it doesnt hurt to have a second one as backup incase the first one fails.  You are going to want to control your fan speed based off your water temp probe rather than component temp.  this is easily controlled in the Asus Fan control bios.  Make all your fan changes in bios and avoid Asus's crappy windows software, ie: ai suite.  They have a habit of polluting your windows registry and all the software conflicts with each other. 

as mcgman80, mentioned above ----> Stick to Clear fluids
 
If you read nothing else in the Thread --->  Ready to try water cooling. Where to start? Library of links-basics to expert
 
READ these: "coolant chemistry"
 
LINK8-A
http://www.overclockers.com/pc-water-coolant-chemistry-part-i/
 
LINK8-B
http://www.overclockers.com/pc-water-coolant-chemistry-part-ii/