Counterfeit Socket 478 mainboards are circulating on platforms like Facebook Marketplace, cloning the Asrock P4i45GV and inheriting its defining fraud: an 'AGP' slot wired directly to the PCI bus. Asrock called this the AGI slot on the original board, a cost-cutting measure that quietly shipped on genuine hardware. The clones copied it exactly, markings removed, no documentation included.
The electrical consequences are serious, not just cosmetic. AGP slots are keyed for 1.5V or 3.3V cards. These AGI slots are keyed for 1.5V AGP cards but supply voltages that can destroy 1.5V-only GPUs outright. Only AGP cards with PCI compatibility will function at all, and driver support is unreliable even then. YouTuber Computer Retro Bus documented the full diagnostic process, including the SoundBlaster failures and Windows ME instability that followed, before tracing everything back to the slot.
The original Asrock P4i45GV at least disclosed the AGI limitation in its manual. These clones do not. The boards are genuinely period hardware built on AGP-less Intel chipsets, manufactured decades ago to move unsuspecting buyers into what looked like a capable Pentium 4 platform. Read the full piece and watch the linked video for the step-by-step teardown that exposes exactly how the deception is constructed and what to check before buying any retro Socket 478 board secondhand.
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