Intel Core 2 Duo 2.4 GHz, 2 GB RAM, NVIDIA GeForce 8800GTS / ATI Radeon HD 4850.
While modern digital versions (like those on Steam) are technically based on the PAL release internally, historical regional differences persist if using original console ISOs. Resident Evil 4 HD [NTSC-U][PAL][ISO]
Intel Core 2 Quad 2.7 GHz, 4 GB RAM, NVIDIA GeForce GTX 560. Intel Core 2 Duo 2
The "HD" designation varies significantly between the official Capcom releases and fan-driven enhancements. Intel Core 2 Duo 2.4 GHz
Requires approximately 15 GB for the standard HD edition and up to 38 GB if installing the fan-made texture pack. Regional Differences: NTSC-U vs. PAL