I'm about to build my first gaming PC and I want to make sure everything is perfect before I start ordering parts. My main focus is on sim racing with iRacing and Microsoft Flight Simulator, both of which I hear demand a lot from the CPU and GPU, especially if I want smooth performance at high settings. I'm aiming for a solid setup that prioritizes stability over any overclocking. Here's what I'm planning:
- **CPU:** AMD Ryzen 7 9800X3D
- **GPU:** RTX 5090
- **Motherboard:** MSI MEG X870E ACE MAX
- **RAM:** Corsair Vengeance 64GB (2x32GB) DDR5-6000 CL30 (EXPO)
- **Storage:** Crucial T705 4TB PCIe 5.0 NVMe
- **Cooling:** Arctic Liquid Freezer III 360 (top exhaust)
- **Case:** Lian Li O11 Dynamic EVO XL
- **PSU:** be quiet! Straight Power 12 Platinum 1200W
- **Case fans:** 9 × Lian Li UNI FAN SL-Infinity (intake and exhaust)
I'm not planning to overclock the CPU as my priority is reliability. Here are my main questions:
1. Are there any compatibility or balance issues with these components?
2. Is the ACE MAX a good match for the 9800X3D, or is it more than I need?
3. Should I consider switching to PCIe 4.0 storage instead of PCIe 5.0 for these sims?
4. Any specific recommendations for improving performance in MSFS or iRacing? Thanks for your help!
5 Answers
As for compatibility, you're golden with those top-tier components. The ACE MAX, though? It's definitely overkill for the 9800X3D. A solid $200 motherboard would do the job just fine without the extra cost!
No issues with compatibility, but seriously consider your motherboard choice. The ACE MAX is fancy but mostly for aesthetics. Also, double-check your cooler's fit with the motherboard's heatsinks; I had to return mine because it interfered with mine!
You could definitely save some cash on components like the motherboard, storage, and even the RAM. The difference between 6000CL30 and 6000CL36 is negligible with an X3D CPU. Plus, PCIe 5.0 storage won’t give you any real performance boost in these games.
Totally! I’m seeing PCIe 4.0 drives at similar prices these days, and they perform just as well for gaming.
My build's pretty similar to yours and runs flawlessly. I have the same CPU and GPU! Just a heads up, you might want to look into Lian Li power supplies; they make cable management a breeze!
That's smart advice! I always recommend those brands for reliable power supplies.
Honestly, if you can swing a 5090, don't stress too much about the small stuff. Just enjoy the build process!
Exactly! A powerful GPU is crucial for those sims, especially at 4K. Just make sure the other parts are balanced to avoid wasting your investment.

Good call on the cooler! I was planning to get an NVMe without a heatsink, since the ACE MAX has one already.