GPU Upgrade Compatibility Checker

First, it compares your GPU length and thickness (slot width) against your available space to determine whether it can physically install without blocking key components or ports. Next, it checks PSU wattage by estimating peak load and applying a safety headroom factor (about 1.25–1.35×). Then it validates whether the PSU has the needed native power connectors (and flags adapter needs). Finally, it estimates CPU bottleneck risk by comparing your selected CPU tier to the GPU tier using a simple tier-gap heuristic.

The physical fit and power checks use simplified assumptions rather than exact manufacturer transient measurements, so “borderline” PSU results may still be risky under heavy sustained load. The bottleneck indicator is not a benchmark—it’s only a coarse value based on tier difference, so performance can vary widely by game/engine and resolution. If you haven’t provided case clearance or connector details, the tool will treat the result as partial rather than definitive.

If your GPU requires 12VHPWR / 12V-2x6, the calculator specifically checks for native PSU support or a validated adapter path; missing connectors can turn the result into “Not recommended.” Extremely long GPUs near the clearance limit may pass on paper but still be constrained by cables, drive cages, or front-panel headers—those aren’t modeled in detail. Also, if your upgrade is a big tier jump versus your current CPU, bottleneck risk can rise to “moderate” or “high” even when power and fit are fine.

A passing power check doesn’t guarantee cable compatibility (use the correct PCIe/GPU cables that came with your PSU when possible). This tool doesn’t model motherboard BIOS support, PCIe lane sharing, case airflow, GPU sag brackets, or cooling clearance—so keep an eye on thermals and airflow. If you see a hard fail in fit, power, or connectors, don’t assume “it might work anyway”—those are the changes most likely to prevent a safe installation.