Which expansion card slot form factor provides the highest point-to-point bandwidth for dedicated graphics processing units (GPUs) on modern consumer motherboards?
Answer and explanation
Correct answer: D. PCI Express x16 (PCIe x16)
- Step 1: PCI Express uses switched, point-to-point serial differential signaling across paired transmit and receive lanes.
- Step 2: A PCIe x16 slot incorporates 16 full duplex data lanes, delivering tens of gigabytes per second of bidirectional bandwidth required by high-performance GPUs.
Answer
PCI Express x16 (PCIe x16)
Why not the others: 'PCI Express x1' PCIe x1 provides a single differential transmission lane, used for low-bandwidth expansion cards like sound cards or Wi-Fi adapters; 'Legacy PCI (32-bit)' Legacy conventional PCI is an obsolete parallel shared bus operating at 33 MHz with a maximum total bandwidth of only 133 MB/s; 'AGP (Accelerated Graphics Port)' AGP was a dedicated 1990s parallel graphics bus standard replaced entirely by PCI Express in 2004.
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