No design work was completed. The Flux project remains empty with no schematic components, nets, PCB layout, or BOM.

This request also needs several specifications before implementation: DDR3 controller/FPGA and memory part numbers, memory width/capacity, regulator input source and load currents, clock distribution, connector requirements, board dimensions, and whether native Autodesk Eagle .sch/.brd files are mandatory. For a 4-layer DDR3 board, I would typically use signal/GND/power/signal layers, uninterrupted return paths, controlled impedance, byte-lane grouping, short matched DQ/DQS routes, length-matched address/command/clock signals, appropriate termination, dense local decoupling, and plane/PDN analysis for the 3.3 V, 1.8 V, 1.2 V, and 1.0 V rails.

I can apply established DDR3 layout and power-integrity practices, but I do not have personal project experience and should not claim otherwise. Execution stopped because your ACUs ran out.