From a "practical" point.Having the biggest & fastest sounds great, but....FSX
CAN be made to use more cores, but the best that I could get on FSX with a i5 was about 1.5 cores.
An i9 would be way overkill on P3d V4. The most that I've seen my i7
(8 cores) using with P3d is about 4, maybe 5 cores.
That's not really a problem, because I run a lot of other programs like Active Sky for P3d V4 and Active Sky Cloud Art. I run many other "support" programs at the same time such as SPAD.neXt & Plan-G.
The CPU speed is VERY important, but I'm just using a 4.0 GHz i7 CPU lightly bumped up to 4.4. And that's good enough to get me just about everything that I want.
Video cards are another place where you don't need the very best for FSX. An
EVGA GeForce GT 730 4GB GDDR5 for only $84.22. AMD has some very good deals too, for less.
That GT 730 should work in your present system and make a big difference is FSX. So you might want to get one while you save for a new gamming computer.
But for Prepar3d V4? Not so good.
P3d V4 can farm off some flight sim work to the newer video cards, which is why I bought one with 8 GB.
The problem is that if
you don't have a fast
(gaming) motherboard
& CPU, the video card will be CPU bound and never give you what you paid for.
That's the best advice that I can give. If computer components aren't familiar to you, check out
Tom's Hardware. It may take a while to learn what you need/want, but it's a very good place to start.
DEFINITION"The bleeding edge" - The BEST hardware made. Why the "bleeding" part? Because you're going to bleed a lot of money to buy it.
And you know what? Two months after you buy it, somethin even better will come along.
Stick to buying something a little below "The bleeding edge" and you'll still be better off than most simmers.
PS - the instruments on the 2 USB monitors? That's an older program that I just removed. Now I'm using
Air Manager 3.0.
Choose your panel from one of the included 14+ premade panels, or create your own from a library of more than 400 free instruments.
If you're so inclined, you can make up your own panels and instruments and have them automatically change over when you switch planes.
Making panels is pretty simple. Download a few of the 400 free instruments and put them on a background.
Making your own instruments is harder, but do able. Or, if you're lazy like me - just alter one of the free ones.
Air Manager 3.0 will work on just about any slow PC computer with very low FPS loss. If you buy the "Air Player" extension you can put a self built panel on any old, slow, computer or laptop. You can even download panels to a Raspberry Pi or an Arduino UNO/MEGA.