Verify the interface (PCI vs. PCIe) and operating system support. Many older DVR cards only work with Windows XP or 7, so check for Windows 10/11 compatibility before purchasing. Card vs. Standalone DVR: Which is Better?
This determines how many cameras can be connected. Common options include 4, 8, or 16-channel cards, though some professional cards can be stacked to support up to 64 cameras. buy cctv dvr card
Choosing between a DVR card and a standalone unit depends on your technical comfort and existing hardware. Verify the interface (PCI vs
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