A Source engine sandbox where performance depends entirely on the mods and contraptions you spawn. RAM errors are common on systems with only 4GB.
Actual FPS may vary based on RAM speed, background processes, and other system factors
Performance Report
At 1080p, frame rates range from 54 to 140 FPS depending on quality settings. At 1440p, frame rates range from 42 to 90 FPS. At 4K, frame rates range from 23 to 56 FPS.
The GeForce RTX 4090 is 1051% above the recommended GPU (GeForce GTX 750) for Garry's Mod. The Core i7-3820 is 56% below recommended, but 93% above minimum.
The GeForce RTX 4090 sets the FPS ceiling at all 1080p settings, all 1440p settings, all 4k settings, while the Core i7-3820 still has additional frame-generation headroom.
Approximated average price on current market:
Combo price: $1679. At 1080p Ultra, this combo delivers 54 FPS, equivalent to 0.03 FPS per dollar.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p | 0.083 fps/$ | 0.062 fps/$ | 0.043 fps/$ | 0.032 fps/$ |
| 1440p | 0.054 fps/$ | 0.041 fps/$ | 0.037 fps/$ | 0.025 fps/$ |
| 4k | 0.033 fps/$ | 0.030 fps/$ | 0.020 fps/$ | 0.014 fps/$ |
* Table values represent FPS per Dollar (higher is better)
This section is based on estimated CPU/GPU FPS ceilings, not utilization percentages.
At 4k ultra, the GeForce RTX 4090 sets the ceiling at about 29 FPS, while the Core i7-3820 has headroom up to 130 FPS. In this scenario, the GPU limits the CPU potential by 78% (FPS gap: 101 FPS). Overall distribution: GPU limits 12/12 cells, CPU limits 0/12, balanced 0/12.
Your GeForce RTX 4090 is the limiting side in the heaviest mismatch. This means part of the Core i7-3820 frame-generation potential remains unused in those settings.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | GPU Limits CPU 10% | GPU Limits CPU 31% | GPU Limits CPU 51% | GPU Limits CPU 63% |
| 1440p (2K QHD) | GPU Limits CPU 33% | GPU Limits CPU 47% | GPU Limits CPU 51% | GPU Limits CPU 64% |
| 4K (Ultra HD) | GPU Limits CPU 57% | GPU Limits CPU 60% | GPU Limits CPU 73% | GPU Limits CPU 78% |
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.
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 56% below recommended and your GPU is 1051% below recommended, but both meet minimum specs. Playable at Low/Medium settings, 1080p or below.
-56%vsrecommended
+1051%vsrecommended
+93%vsminimum
+11449%vsminimum
The Core i7-3820 and GeForce RTX 4090 will struggle to run Garry's Mod at smooth framerates. At 1080p Ultra, you can expect around 54 FPS which is classified as "playable". Consider lowering settings or upgrading your hardware.
This CPU + GPU combo costs approximately $1679 ($30 CPU + $1649 GPU). Your GeForce RTX 4090 provides phenomenal top-tier performance but at a premium enthusiast price. Since you are essentially at the ceiling of current hardware capabilities, there are no meaningful performance upgrades available. However, if you wanted a more cost-effective build that still delivers a great experience, you could theoretically step down to a high-end card with a significantly better value rating.
Your GeForce RTX 4090 is already a top-tier graphics card. While it's technically the limiting factor here (which means you are fully utilizing your GPU's visual horsepower exactly as intended), there is no meaningful upgrade path that would drastically improve your Garry's Mod performance right now. GPU fully utilized 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.
Garry's Mod 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.
Garry's Mod requires at minimum a Pentium 4 (CPU) and GeForce 6 series (GPU) with 4 GB RAM and 5 GB storage. For the recommended experience, you need a Core i5 and GeForce GTX 750 with 8 GB RAM. Your setup meets the minimum requirements but falls short of the recommended specs. You may need to lower some settings for smooth performance.
These Garry's Mod 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.
