A+ 220-1101 — Domain 3: Hardware

Sharpen your A+ Core 1 Domain 3 skills with 90 questions on PC hardware—motherboards & memory, NVMe/SATA storage and RAID, display & I/O interfaces, printers/MFPs, power & cooling, and BIOS/UEFI/boot processes. Every item includes detailed explanations.What you’ll practiceIdentify motherboard form factors, sockets, slots, and power connectors.Select/verify RAM types (DDR4/DDR5, SO‑DIMM vs DIMM), channels, ECC/registered, and XMP/DOCP/EXPO.Choose the right storage (NVMe vs SATA), M.2 keying/sizes, and RAID levels for redundancy/performance.Match display/audio/USB/Thunderbolt interfaces to use‑cases; add Wi‑Fi/BT via PCIe.Troubleshoot and maintain laser/inkjet/thermal/impact printers and MFPs.Size PSUs, place fans, apply TIM, and interpret 80 PLUS ratings.Configure BIOS/UEFI: Secure Boot, PXE, GPT/MBR, Fast Boot, CSM, and boot order.Recommended time90 minutesPassing score (suggested)90%Motherboards / CPU / RAMForm factors: ATX (≈12×9.6 in), microATX (≈9.6×9.6), Mini‑ITX (≈6.7 in, typically 1 PCIe slot).Sockets: Intel LGA1700 (12th/13th gen); AMD AM4 (pre‑AM5 mainstream), AM5 (newer), TR4/sTRX4 (Threadripper).Power: 24‑pin ATX (board), 4/8‑pin EPS12V (CPU).Memory: DIMM vs SO‑DIMM; DDR gens not cross‑compatible; dual‑channel requires matched capacity/slots; ECC corrects single‑bit errors; Registered (buffered) for large capacities; XMP/DOCP/EXPO loads vendor profiles.CPU features: SMT/Hyper‑Threading (1 core → 2 threads); VT‑x/AMD‑V for virtualization.Storage & RAIDInterfaces: SATA III 6 Gbps (AHCI/NCQ/hot‑swap), NVMe (PCIe, low latency, deep queues), SAS (dual‑port, expanders).