Known to slow down in the late game due to the exponential number of unit calculations. Single-core CPU speed is the most important factor for performance.
Actual FPS may vary based on RAM speed, background processes, and other system factors
Performance Report
At 1080p, all quality settings exceed 83 FPS. At 1440p, all settings exceed 66 FPS. At 4K, frame rates range from 42 to 83 FPS.
The GeForce RTX 5090 is 889% above the recommended GPU (GeForce GTX 570) for Hearts of Iron IV. The Opteron X3421 is 30% above the recommended CPU (Core i5-750).
At lower resolutions (1080p (low/medium), 1440p low, 4k low), the Opteron X3421 sets the FPS ceiling. As graphical load increases at (1080p ultra, 1440p ultra, 4k ultra), the GeForce RTX 5090 becomes the FPS-limiting side. The FPS ceiling is closely matched at 1080p high, 1440p (medium/high), 4k (medium/high).
This chart answers a simple question: which upgrade is more likely to increase FPS first? In this case, the answer is more often the CPU.
The largest gap appears at 1080p Low, where the Opteron X3421 reaches about 83 FPS, while the GeForce RTX 5090 still has headroom up to roughly 116 FPS.
That means the Opteron X3421 is hitting its performance ceiling first, leaving a 28% gap versus the GeForce RTX 5090's available headroom in the most unbalanced scenario. Across all tested settings, this pairing is CPU-limited in 4 out of 12 cases, with 3 GPU-limited and 5 balanced results.
Overall, this is a CPU-leaning combination in this game.
The Opteron X3421 is more often the limiting part in this game, so a CPU upgrade is somewhat more likely to deliver the bigger FPS gain than a GPU upgrade.
This chart shows which upgrade is more likely to unlock more FPS in each tested setting. The lower line represents the part that reaches its limit first. When the CPU and GPU lines stay close together, the system is more balanced. When the gap widens, one component is more clearly holding the other back. Hover any setting to inspect it.
The lower line is the current limiter. The closer the two lines are, the more balanced the CPU and GPU are for this game.
Each line represents an estimated FPS ceiling for one component, rather than live usage alone.
To estimate the CPU ceiling, we pair the Opteron X3421 with GeForce RTX 5090, our current GPU anchor. To estimate the GPU ceiling, we pair the GeForce RTX 5090 with Ryzen 9 9950X3D, our current CPU anchor.
The lower line indicates the current limiter, since that component reaches its FPS ceiling first. In most scenarios, that is also the part most likely to deliver the bigger performance uplift if upgraded first.
The percentage shown represents the gap between the two ceilings. In practical terms, it shows how much of the stronger component's potential is left unused because the weaker one becomes the bottleneck first.
See how your processor and graphics card compare against the game official minimum and recommended system specs. The placement of your hardware is calculated using relative synthetic performance scores to help you gauge overall playability.
Your CPU is 30% above and your GPU is 889% above the recommended specs. High/Ultra at 1080p. Lower settings for higher resolutions.
+30%vsrecommended
+889%vsrecommended
-8%vsminimum
+1136%vsminimum
Yes, the Opteron X3421 paired with the GeForce RTX 5090 can run Hearts of Iron IV smoothly up to 1440p achieving around 66 FPS at Ultra quality. Your GPU is 889% above the recommended specs, and your CPU is 30% above the recommended requirements.
Price data is not currently available for this combination. In general, look for setups where the CPU and GPU are balanced - this ensures you're not overspending on one component that the other can't keep up with.
For Hearts of Iron IV, upgrading the CPU would usually improve performance first. In the Performance Limiter Analysis, the Opteron X3421 is the side that most often caps the frame rate, while the GeForce RTX 5090 still has additional headroom in the tested presets. The main bottleneck appears on the CPU side. The largest gap shows up at 1080p Low, where the CPU reaches about 83 FPS while the GPU still has headroom up to roughly 116 FPS. Across all tested settings, the distribution is 3/12 GPU-limited, 4/12 CPU-limited, and 5/12 balanced.
Hearts of Iron IV does not currently support Frame Generation technologies like DLSS 3 or FSR 3. Your performance is based entirely on native rendering. If the game adds support in a future update, newer GPUs will benefit the most.
Hearts of Iron IV requires at minimum a Core 2 Quad Q9400 (CPU) and GeForce GTX 470 (GPU) with 4 GB RAM and 2 GB storage. For the recommended experience, you need a Core i5-750 and GeForce GTX 570 with 4 GB RAM. Your Opteron X3421 and GeForce RTX 5090 both exceed the recommended specs, so you're well-positioned for a great experience.
These Hearts of Iron IV FPS results are not arbitrary numbers. They come from calculations informed by thousands of real gaming benchmarks, and the typical accuracy range is around 10% to 15%. That makes them far more useful than generic FPS calculators that simply invent values without a benchmark foundation. Actual in-game performance can still vary with drivers, updates, RAM configuration, cooling, and the exact scene being rendered.
Performance estimates are based on synthetic benchmarks and hardware capabilities.
Results may vary based on drivers, OS, and background processes.
