# BottleneckPC > Free PC bottleneck calculator and PC-building tools. Instantly checks whether a CPU > and GPU are well matched at 1080p, 1440p, and 4K, and recommends balanced upgrades. > No account, no usage limits. Data is refreshed regularly from published benchmark > aggregates; scores are estimates for comparison, not lab measurements. BottleneckPC answers questions like "Will a Ryzen 7 7800X3D bottleneck an RTX 5090?" with a percentage-based bottleneck score per resolution, estimated AAA game FPS, spec comparisons, and upgrade recommendations. ## Tools - [Bottleneck Checker](https://bottleneckpc.com/bottleneck-checker): Select a CPU, GPU, and resolution to get a bottleneck verdict and upgrade advice. - [Build a PC](https://bottleneckpc.com/build-a-pc): Complete, balanced part lists by budget ($500–$3000+) and use case (gaming, streaming, productivity). - [PSU Calculator](https://bottleneckpc.com/psu-calculator): Minimum and recommended power supply wattage for a given CPU + GPU + peripherals. - [Monitor Match](https://bottleneckpc.com/monitor-match): Ideal monitor resolution, refresh rate, and panel type for a specific GPU. - [RAM Advisor](https://bottleneckpc.com/ram-advisor): Memory speed, capacity, and latency recommendations per platform, with kit picks at three budgets. - [Case Finder](https://bottleneckpc.com/case-finder): PC case picks filtered by form factor, GPU clearance, and priority (airflow, quiet, compact, looks). ## Pre-computed answers - CPU + GPU pairing pages: https://bottleneckpc.com/bottleneck-checker/{cpu-slug}/{gpu-slug} (e.g. /bottleneck-checker/ryzen-7-7800x3d/rtx-5090) — 900+ pairings with per-resolution bottleneck analysis and FAQs. - Best CPU for a GPU: https://bottleneckpc.com/best-cpu-for/{gpu-slug} - Best GPU for a CPU: https://bottleneckpc.com/best-gpu-for/{cpu-slug} - Prebuilt part lists: https://bottleneckpc.com/build-a-pc/{use-case}-{budget}-{gpu-vendor} ## Method - [How It Works](https://bottleneckpc.com/how-it-works): Scoring methodology — how CPU and GPU scores are derived and how resolution shifts the CPU/GPU workload split (roughly 60% CPU-bound at 1080p vs 80% GPU-bound at 4K). ## Blog - [Blog](https://bottleneckpc.com/blog): Hardware buying guides and PC-building explainers, updated for current-generation parts. - [RSS feed](https://bottleneckpc.com/feed.xml) ## Policies - Some outbound links are affiliate links (Amazon and others); BottleneckPC may earn a commission at no cost to the buyer. See https://bottleneckpc.com/affiliate-disclosure - Benchmark data is approximate and for comparison purposes only.