Board Form Factors & Connectors for A+
Short answer
A motherboard's form factor determines case compatibility and expected expansion capacity. ATX boards offer the most expansion slots in common consumer builds, microATX offers reduced expansion for smaller cases, and Mini-ITX is for compact systems with minimal slots. Connectors and slots determine what will physically and electrically connect: PCIe for high-speed add-ons, SATA for cable-attached storage, M.2 for onboard SSDs or modules, headers for front-panel and peripheral connections, and specific power connectors required from the PSU.
Why it appears on the exam
- Identify the likely form factor from a photo and state whether it will fit a given case. - Given images of connectors, match them to SATA, M.2, PCIe, and front-panel headers. - Determine whether a proposed add-on card can be installed based on visible slot availability.
Key concepts
Concept 1
Required terms
ATX: A common full-size consumer motherboard form factor; implies standard mounting points and multiple expansion slots. microATX: A smaller form factor than ATX with fewer expansion slots but similar mounting patterns and many shared connectors. ITX: Mini-ITX is a compact form factor for space-constrained builds, usually with a single expansion slot. PCIe: Primary high-speed expansion slot standard for modern add-on cards such as video cards and NVMe adapters.
Example
A full-tower gaming PC typically uses an ATX motherboard with multiple PCIe x16 slots for GPUs and several SATA ports for drives.
Concept 2
How Board Form Factors & Connectors works
A motherboard's form factor determines case compatibility and expected expansion capacity. ATX boards offer the most expansion slots in common consumer builds, microATX offers reduced expansion for smaller cases, and Mini-ITX is for compact systems with minimal slots. Connectors and slots determine what will physically and electrically connect: PCIe for high-speed add-ons, SATA for cable-attached storage, M.2 for onboard SSDs or modules, headers for front-panel and peripheral connections, and specific power connectors required from the PSU.
Example
A home-theater mini PC likely uses Mini-ITX with a single PCIe slot and one or two SATA ports.
Concept 3
Common confusion
- Assuming physical similarity implies compatibility: two boards that look similar may have different mounting holes or I/O shield arrangements. - Believing all M.2 slots support NVMe: some are wired for SATA only. - Thinking any PSU connector will fit: CPU power connectors must match board requirements.
Example
Replacing a SATA SSD with an M.2 NVMe SSD requires checking the M.2 slot and whether it supports NVMe (PCIe lanes) or only SATA.
Concept 4
Core 1 (220-1201) question cues
Identify the likely form factor from a photo and state whether it will fit a given case; Given images of connectors, match them to SATA, M.2, PCIe, and front-panel headers; Determine whether a proposed add-on card can be installed based on visible slot availability.
Example
A full-tower gaming PC typically uses an ATX motherboard with multiple PCIe x16 slots for GPUs and several SATA ports for drives.
Sample questions
Select an answer to reveal the explanation. For tracked practice and weak-area review, use the Cultiv8 app.
Q1.In an A+ question, this detail appears: A full-tower gaming PC typically uses an ATX motherboard with multiple PCIe x16 slots for GPUs and several SATA ports for drives. Which option matches it?
Q2.For this A+ objective, the scenario says: A home-theater mini PC likely uses Mini-ITX with a single PCIe slot and one or two SATA ports. What is the best match?
Q3.An A+ support scenario describes this situation: A home-theater mini PC likely uses Mini-ITX with a single PCIe slot and one or two SATA ports. Which answer fits best?
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