AMD Radeon RX 6600

The RX 6600's strongest measured trait is frames per $100 at 20.5 fps/$100, which puts it in the 77th percentile — that metric describes raw frames bought per hundred dollars, before any age weighting. Its weakest is bandwidth per pixel at 1,356 B/px (16th percentile). That is a wide spread for a single card: it is specialised rather than balanced, and whether it suits you depends on which of the two you actually load.

The RX 6600 turns a 132W board power budget into 44.8 fps at 1440p, or 0.34 fps/W against a pool median of 0.32 fps/W. Power, not transistor count, is the binding constraint on a modern GPU — Dennard scaling stopped holding around 2005, and Esmaeilzadeh and colleagues showed at ISCA 2011 that the fraction of a chip that can be powered at full speed shrinks with every node (“dark silicon”). Frames per watt is the shortest honest summary of what an architecture is doing with that budget.

For scale: the closest AMD card from an earlier generation is the AMD Radeon RX 5700 (2019), at 46.7 fps and 180W. The RX 6600 is 4% slower while drawing 48W less.

Every rendered pixel has to be fed from memory. At 1440p the RX 6600 has 1,356 B/px of memory bandwidth available per pixel it draws, against a median of 1,808 B/px — a tight ratio, which is why its frame rate falls off harder than its shader count suggests as resolution and texture quality climb. This is the roofline model applied to a game frame: Williams, Waterman and Patterson (Communications of the ACM, 2009) showed that any workload runs into either a compute ceiling or a memory-bandwidth ceiling, and that the ratio of the two is what decides which one you hit.

On memory capacity, the RX 6600 carries 8GB against a median of 8GB across the 3 other cards within 10% of its 1440p frame rate. That matches its class, so capacity is unlikely to be the first thing that limits it.

Method: percentiles are computed over the 77 non-legacy cards with a 1440p figure. Frame rates come from Tom's Hardware GPU hierarchy; specifications from manufacturer datasheets. Theoretical FP32 TFLOPS is deliberately not used as a cross-vendor comparison — RDNA 3 and 4 dual-issue FP32 doubles the paper figure without doubling game performance, and AMD itself declined to count it as extra shaders. The measured Steel Nomad score is used as the compute proxy instead. GPURanker does not run its own benchmarks.