Left 4 Dead 2
A timeless classic. It is bound by single-thread performance but is so lightweight that it runs on practically any functional PC today.
Actual FPS may vary based on RAM speed, background processes, and other system factors
Performance Report
At 1080p, frame rates range from 31 to 62 FPS depending on quality settings. At 1440p, frame rates range from 23 to 47 FPS. At 4K, frame rates range from 16 to 31 FPS.
The Radeon HD 4870 is 983% above the recommended GPU (GeForce 7600) for Left 4 Dead 2. The Ryzen 7 9800X3D is 1724% above the recommended CPU (Core 2 Duo 2.4GHz).
The Radeon HD 4870 sets the FPS ceiling at all 1080p settings, all 1440p settings, all 4k settings, while the Ryzen 7 9800X3D still has additional frame-generation headroom.
Approximated average price on current market:
Combo price: $490.38. At 1080p Ultra, this combo delivers 31 FPS, equivalent to 0.06 FPS per dollar.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p | 0.126 fps/$ | 0.102 fps/$ | 0.086 fps/$ | 0.063 fps/$ |
| 1440p | 0.096 fps/$ | 0.075 fps/$ | 0.063 fps/$ | 0.047 fps/$ |
| 4k | 0.063 fps/$ | 0.051 fps/$ | 0.043 fps/$ | 0.033 fps/$ |
* Table values represent FPS per Dollar (higher is better)
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This chart answers a simple question: which upgrade is more likely to increase FPS first? In this case, the answer is clearly the GPU.
The largest gap appears at 1080p Ultra, where the Radeon HD 4870 reaches about 31 FPS, while the Ryzen 7 9800X3D still has headroom up to roughly 598 FPS.
That means the Radeon HD 4870 is hitting its performance ceiling first, leaving a 95% gap versus the Ryzen 7 9800X3D's available headroom in the most unbalanced scenario. Across all tested settings, this pairing is GPU-limited in 12 out of 12 cases, with 0 CPU-limited and 0 balanced results.
Overall, this is a clearly GPU-bound combination in this game.
The Radeon HD 4870 is consistently the limiting part in this game, so upgrading the GPU is more likely to deliver a larger FPS gain than upgrading the CPU.
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 Ryzen 7 9800X3D with GeForce RTX 5090, our current GPU anchor. To estimate the GPU ceiling, we pair the Radeon HD 4870 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 1724% above and your GPU is 983% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+1724%vsrecommended
+983%vsrecommended
+1232%vsminimum
-8%vsminimum
The Ryzen 7 9800X3D and Radeon HD 4870 will struggle to run Left 4 Dead 2 at smooth framerates. At 1080p Ultra, you can expect around 31 FPS which is classified as "playable". Consider lowering settings or upgrading your hardware.
This CPU + GPU combo costs approximately $490.38 ($465.38 CPU + $25 GPU). Since the GPU is the main limiting factor, investing in a stronger GPU will improve your framerates and overall value. For example, upgrading to the GeForce GTX 780 Ti for around $699 (Rank #78 for value) could deliver noticeably better performance.
For Left 4 Dead 2, upgrading the GPU would usually give you the most noticeable improvement. In the Performance Limiter Analysis, the Radeon HD 4870 is the side that most often caps the frame rate, while the Ryzen 7 9800X3D still has additional headroom in the tested presets. The main bottleneck appears on the GPU side. The largest gap shows up at 1080p Ultra, where the GPU reaches about 31 FPS while the CPU still has headroom up to roughly 598 FPS. Across all tested settings, the distribution is 12/12 GPU-limited, 0/12 CPU-limited, and 0/12 balanced.
Left 4 Dead 2 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.
Left 4 Dead 2 requires at minimum a Pentium 4 3.0GHz (CPU) and GeForce 6600 (GPU) with 2 GB RAM and 13 GB storage. For the recommended experience, you need a Core 2 Duo 2.4GHz and GeForce 7600 with 2 GB RAM. Your Ryzen 7 9800X3D and Radeon HD 4870 both exceed the recommended specs, so you're well-positioned for a great experience.
These Left 4 Dead 2 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.
