Question Help building this PC together and will it work?

[Elliah246]

I'm asking for a friend who's asking for a friend who's asking for a friend, crazy i know. But here i am.
Specs are as follows:

CPU • AMD Ryzen 7 9800X3D

GPU • AMD Radeon RX 7900 XTX

Board • ASUS ROG Strix X870E-E or ASUS ROG Strix B850-E
Can't make up my mind which board to take, would be so nice if you can help me out... pros/cons? The most expensive option isn't always the best.

PSU • BE QUIET! Dark Power Pro 13 1300W
I've read bad reviews about this power supply like explosions or disturbing noise, however the previous series (pro 12) sold out. Any titanium 80 plus alternatives?
Will 1000W be fine for this system?

Display • ASUS ROG Swift OLED PG27UCDM
This monitor is 4k, 240Hz and uses Displayport 2.0, can the AMD Radeon RX 7900 XTX graphics card even handle the UHBR 80 spec or should i wait for the next gen?
I want to avoid DSC.

Case • Corsair 4000D Airflow ATX Mid Tower

CPU Cooler • Arctic Liquid Freezer III 360

Keyboard • Any non RGB with fast responsetimes
Help me find one?

Mouse • Logitech G502 HERO

Memory/Ram • dual channel DDR5 2x16 GB or 2x32 GB
On AMD's website i couldn't find EXPO certified ram from corsair, is there any corsair ram that will work out well as dual memory channel with expo enabled?
Otherwise which brands can you recommend? From my understanding the ram should have a low CL number (low latency) and high MT/HZ.
What's the best DDR5 options with lowest CL combined with highest HZ? For example my current corsair vengeance runs at C16 combined with 3200MHz.
I can't find anything near C16 when it comes to DDR5. Your help is greatly appreciated.

 

[Elliah246]

I mentioned the 5090 as an example since it's by far the most power hungry card on the market. But who knows how it's going to be in 2 years.

It doesn't really matter what kind of games you expect to play. Your PSU has to provide enough power for your system to work at 100% load, otherwise you would have a lot problems. The 7900xtx is not as power hungry as the 4090, for example, but still requires a good amount of juice. 850W should be fine if you don't get an OC version, but some people say it's better to go with 1000W to have some extra headroom. But if you get an OC version (with 3x 8-pin connectors instead 2x), then you should definitely go with 1000W.

Thanks again for helping me!
I was going to get the unlocked version with no plans to use the OC but eventually trying it out.
OC hardware has more resell value.
Since you mentioned 3x8 ping connectors instead of 2, i didn't even consider this... does this affect my PSU choice? Are ATX 3.0 or 3.1 PSUs compatible with 3x8 or do i have to look out for specific models only?

 

[JayGau]

Thanks again for helping me!
I was going to get the unlocked version with no plans to use the OC but eventually trying it out.
OC hardware has more resell value.
Since you mentioned 3x8 ping connectors instead of 2, i didn't even consider this... does this affect my PSU choice? Are ATX 3.0 or 3.1 PSUs compatible with 3x8 or do i have to look out for specific models only?

If I understood well, the only difference between 3.0 and 3.1 is the new improved (and safer) version of the 12VHPWR connector (the 12v-2x6). You are not going to use either of these with the 7900xtx, but again, if you want to be future proof go with 3.1.