Information-Limited Gravity: Bandwidth Constraints as the Origin of Dark Phenomena

We propose that gravitational anomalies attributed to dark matter and dark energy emerge from finite information-processing bandwidth in maintaining gravitational fields. Building on holographic principles (Susskind 1995; 't Hooft 1993) and entropic gravity (Verlinde 2011; Jacobson 1995), we derive a source-side modification where systems with long dynamical times experience refresh lag, manifesting as enhanced effective gravity. Our goal was testing whether a strictly global, bandwidth-limited phenomenology with zero per-galaxy parameters can reproduce galactic dynamics. Using four-loop QCD and standard RG methods, we define a weight w(r)=λξn(r)(Tdyn/τ0)α ζ(r) with globally fixed constants (α=0.191). On SPARC galaxies (N=127, quality Q=1), our Information-Limited Gravity (ILG) achieves median χ²/N=2.75 across 126 galaxies under identical constraints as a fair MOND baseline (median 2.47, 125 galaxies). The MOND acceleration scale a₀≈10-10 m/s² emerges naturally without tuning. Cosmological tests show w(k,a) modifies growth and lensing coherently while preserving PPN parameters and Solar System tests. This is unique because: the anchor scale and all parameters are fixed globally from information theory; both galactic and cosmological "dark" effects arise from one mechanism; the predictions include scale-dependent growth f(k,z) and CMB-galaxy cross-correlation sign. The framework suggests dark phenomena reflect computational constraints rather than exotic particles.