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Thread: The Best CPU for FSX?

  1. #1
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    Default The Best CPU for FSX?

    I had been previously convinced that the best upgrade for my computer would be an Asus Prime Z270-A motherboard and an i7 7700K processor. At the time the z270-A MB was about $150, now it's $300+. So I am thinking that I should go with the Asus Z370-A (about $150) and an i7 8700K processor. The 7700K won't work with the 300 series motherboards. My question is this, will the 370-A MB and 8700K CPU be just as good or better with FSX?

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    I have an i7-7700K, running at its native clock rate of 4.2 GHz on a Z170-A motherboard. I am happy with that combo.

    Jorgen

  3. #3

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    You want the fastest single threaded CPU you can afford. I don't know how accurate their ratings are, but check here: https://www.cpubenchmark.net/singleThread.html

    Even with a fast CPU, don't expect absolute blazing performance. You'll still need to change your FS settings to a moderate level. Especially if you use a lot of heavy add-ons. The CPU in my Sig mostly gives me 25 FPS which is what I have the Sim locked to. You shouldn't allow more FPS to ease the burden of the CPU. 25 FPS is good enough and your eye more than likely won't see a difference between 25 and 30 FPS. You may also want to go into your video settings and select the pre-rendered frames under FSX to 2 or 3. There's a few other tricks too that you can add to your FSX.cfg file. There's a sticky on that in the FSX forum.

    Also note that a massive GPU will have little bearing on FS performance. FS is largly CPU dependent.
    Last edited by CRJ_simpilot; 05-13-2018 at 02:36 PM.

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  4. #4

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    Quote Originally Posted by BigT-65 View Post
    My question is this, will the 370-A MB and 8700K CPU be just as good or better with FSX?
    Better. They both have a very similar single thread IPC (https://www.guru3d.com/articles_page..._review,7.html) but the 8700k has a better turbo frequency and seems to be easier to overclock to 5GHz. The 8700k has more cores (which won't help much with FSX but are good for other things) plus, the newer Z370 chipset apparently gives a few percent extra performance. Finally, if you can afford the Z370/8700k combo, why would you even consider an older generation CPU and chipset? Remember also that if you're upgrading an existing system, you'll almost certainly need to replace the memory chips with DDR4 modules.

    What GPU would you be using with it? Whilst a monster GPU won't necessarily give a performance boost in FSX, an inadequate one will probably be a bottleneck for the 8700k and stop it delivering what it's capable of.

  5. Default The Best CPU for FSX?

    Quote Originally Posted by lesh View Post
    What GPU would you be using with it? Whilst a monster GPU won't necessarily give a performance boost in FSX, an inadequate one will probably be a bottleneck for the 8700k and stop it delivering what it's capable of.
    Good point to note. Broken link btw

  6. #6
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    First, my GPU is an Asus NVIDIA Geforce GTX 960 with 4 GB of memory.
    I have been looking at many Z370 motherboards and they don't seem to have many USB 2.0 or USB 3.0 ports and it doesn't have a keyboard port on the back. I don't want to have to buy a bunch of new peripherals, like keyboards, mouse, joystick, wifi adapter, etc. I don't have anything with USB C and I don't know about USB 3.1. But I am trying to keep the cost down and $330 is a little stiff for the Z270-A MB. I am looking at just over $700 for the MB, the CPU and 16 GB of DDR4 memory. The Z270-A would up that to about $900. The system I have now runs FSX pretty good at somewhat high graphics settings, about 25 to 30 FPS, but when I approach big cities and airports FPS go way down to between 5 and 10. I also get blurries after I have been flying for awhile. And also sometimes stuttering where everything just stops for a second or two while things are reloading. My current system has an Asus P6T Deluxe V2 motherboard with i7940 CPU which runs at 2.93 GHz. I have it overclocked to 3.2 and I have 12GB of DDR3 memory. I mostly fly A2A accusim aircraft and have lots of ORBX scenery and airports.
    My main concern about the Z370 motherboards is rather or not I will be able to live with the USB ports they have.
    Last edited by BigT-65; 05-14-2018 at 12:37 AM.

  7. #7

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    USB 3.0/1 is compatible with 2.0. Meaning you can plug a 2.0 USB device into a USB 3.0 port. I have to do this since I used all my other USB ports. Works fine. You will know that the ports are USB 3.0 with the color blue.

    I'm wondering why you are getting blurriness. Do you use a SSD? If not, that would be a great upgrade, and/or a consideration for your new system build. Or you may need to tweak FSX.cfg.

    Actually, under FSX's settings what is your radius set at or what ever it's called?

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  8. #8

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    Good Luck!! It sounds like you're aware of what you need to run flight simulators really well, high processor speed! And if you're buying that nice a processor I'd advise you buy more GPU than you think you'll need today. You'll soon find that a lot of other programs live and die by the speed and adaptability of their GPU (graphics processor unit) rather than the CPU with Microsoft flight simulators.

    Two things I'd advise you to be aware of.

    1. A SSD is great for loading and starting a flight quickly. But it really is of little additional value compared to a mechanical hard drive once your flight is loaded. If money were tight, I'd buy other priorities first. Then later buy a nice big SSD.

    2. Heat is the killer of pc devices! A good way to help insure your pc is running cool is to KEEP IT CLEAN!! Have a regular scheduled cleaning session to reduce heat issues.

    Also I suggest you make sure you have plenty of reserve power from your power supply (PSU) compared to what your pc actually needs to operate. A heavily loaded PSU can end up supplying low voltage to your machine. Since everything has to run at a given wattage, low voltage equals high amperage which equals HIGH HEAT!!

    Rupert
    Last edited by Rupert; 05-14-2018 at 04:16 PM.

  9. #9

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    I have the i7-7700k on an MSI M3 motherboard overclocked to 5ghz. runs great! Runs P3DV4 better then FSX though.

  10. #10
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    Great advise to consider, thanks. I do have all my programs including FSX-SE on a 500GB SSD. And my power supply is a Corsair 850 watt unit. I am having a hard time deciding on a motherboard because of all the various options and some MBs have things that others don't and others have things that those don't. I was partial to Asus because I have been using those for years. But I may have to buy something different. I am leaning heavily to the 8700K CPU so it looks like it will be a Z370 for sure, but then there's -A, -X, -H, -P and so on
    Also the only "Games" I play are FSX and a couple of racing simulators.

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