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, all quality settings exceed 334 FPS, suitable for 144Hz+ monitors. At 1440p, all settings exceed 247 FPS. At 4K, all settings exceed 153 FPS.
The GeForce RTX 4090 is 29675% above the recommended GPU (GeForce 7600) for Left 4 Dead 2. The Xeon E5-1660 v4 is 509% above the recommended CPU (Core 2 Duo 2.4GHz).
The Xeon E5-1660 v4 sets the FPS ceiling at all 1080p settings, all 1440p settings, all 4k settings, while the GeForce RTX 4090 still has headroom.
This section is based on estimated CPU/GPU FPS ceilings, not utilization percentages.
At 1080p low, the Xeon E5-1660 v4 sets the ceiling at about 334 FPS, while the GeForce RTX 4090 could reach 668 FPS. In this scenario, the CPU limits the GPU potential by 50% (FPS gap: 334 FPS). Overall distribution: CPU limits 12/12 cells, GPU limits 0/12, balanced 0/12.
Your Xeon E5-1660 v4 is the limiting side in the heaviest mismatch. This means part of the GeForce RTX 4090 rendering potential remains unused in those settings.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | CPU Limits GPU 50% | CPU Limits GPU 44% | CPU Limits GPU 33% | CPU Limits GPU 26% |
| 1440p (2K QHD) | CPU Limits GPU 33% | CPU Limits GPU 30% | CPU Limits GPU 34% | CPU Limits GPU 31% |
| 4K (Ultra HD) | CPU Limits GPU 41% | CPU Limits GPU 43% | CPU Limits GPU 50% | CPU Limits GPU 48% |
We estimate the maximum FPS the processor can sustain and the maximum FPS the graphics card can sustain in each setting, then compare those limits directly.
Limit Factor formula: (stronger - weaker) / stronger. Example: if CPU ceiling is 200 FPS and GPU ceiling is 140 FPS, then GPU limits CPU by 30%.
CPU Limits GPU means the processor ceiling is lower. GPU Limits CPU means the graphics ceiling is lower. Balanced means the FPS ceilings are close enough that the gap is negligible.
A component can still be the FPS limiter without reaching 100% utilization. The displayed percentages are derived from FPS ceilings, not generic utilization heuristics.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | CPU11% - 40% <> GPU13% - 20% <> | CPU12% - 41% <> GPU15% - 20% <> | CPU12% - 41% <> GPU15% - 20% <> | CPU13% - 45% <> GPU14% - 21% <> |
| 1440p (2K QHD) | CPU14% - 40% <> GPU14% - 20% <> | CPU14% - 40% <> GPU14% - 20% <> | CPU14% - 40% <> GPU14% - 20% <> | CPU14% - 45% <> GPU13% - 21% <> |
| 4K (Ultra HD) | CPU13% - 40% <> GPU15% - 28% <> | CPU15% - 41% <> GPU17% - 29% <> | CPU15% - 41% <> GPU17% - 29% <> | CPU15% - 46% <> GPU17% - 29% <> |
The Xeon E5-1660 v4 + GeForce RTX 4090 pairing runs this title with CPU utilization between 11% and 46% and GPU utilization between 13% and 29%. Xeon E5-1660 v4 keeps significant headroom across presets, while GeForce RTX 4090 is utilized efficiently without persistent saturation. As resolution scales, average GPU load rises from 18% at 1080p to 23% at 4K, while CPU averages move from 27% to 28%.
Neither component is close to saturation: CPU tops out at 46% and GPU at 29%. This pattern suggests possible engine-side limits, an FPS cap, or workload constraints unrelated to raw hardware throughput. It also shows why low utilization does not automatically mean there is no FPS limiter.
At 1080p, averages sit around CPU 27% and GPU 18%. At 1440p, that shifts to CPU 28% and GPU 17%, and at 4K it reaches CPU 28% and GPU 23%. This shows that workload scaling is limited, which can indicate engine-side constraints.
4K (Ultra HD) Medium is the most balanced preset based on this dataset. It runs around CPU 28% (15-41%) and GPU 23% (17-29%), which keeps GeForce RTX 4090 well utilized without constant max-out behavior while Xeon E5-1660 v4 remains stable for consistent frame delivery.
Current utilization does not show an urgent upgrade requirement for either component; the Xeon E5-1660 v4 and GeForce RTX 4090 remain reasonably matched for this title.
Understanding Hardware Utilization: These percentages represent how much of your component's maximum processing power is actively being used during gameplay. They describe hardware load, but they do not directly tell you which component sets the FPS ceiling.
Important: a CPU or GPU can still be the FPS limiter without reaching 100% utilization. Two processors can both show 40% usage and still deliver very different frame rates, depending on per-core speed, cache, engine threading, driver overhead, and frame preparation efficiency.
Data generated by our Machine Learning engine trained on real-world benchmarks. Shows the approximate average utilization at each setting.
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 509% above and your GPU is 29675% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+509%vsrecommended
+29675%vsrecommended
+345%vsminimum
+2422%vsminimum
Yes, the Xeon E5-1660 v4 paired with the GeForce RTX 4090 can run Left 4 Dead 2 smoothly up to 4k achieving around 153 FPS at Ultra quality. Your GPU is 29675% above the recommended specs, and your CPU is 509% 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 Left 4 Dead 2, upgrading the CPU would have the biggest impact on performance. The Xeon E5-1660 v4 is currently the limiting factor — the GeForce RTX 4090 has extra headroom that a faster processor could take advantage of. This is especially noticeable at 1080p where CPU performance matters more. CPU-limited at: 1080p low, 1080p medium, 1080p high, 1080p ultra, 1440p low, 1440p medium, 1440p high, 1440p ultra, 4k low, 4k medium, 4k high, 4k ultra.
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 Xeon E5-1660 v4 and GeForce RTX 4090 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.
