220-1101 Question 260
Single answermicroATXA technician is upgrading an office desktop that currently uses a damaged microATX motherboard. The existing tower case has a standard ATX power supply and several unused drive bays, but the customer wants to keep the current case to reduce cost. The replacement system must support the existing CPU, fit properly in the case, and allow reuse of the current power supply. Which motherboard form factor is the BEST replacement choice?
- A
microATX
- B
Mini-ITX
- C
ATX
- D
NLX
Show answer and explanation
Correct answer: A
Explanation
The best answer is microATX because it preserves the original system design and minimizes installation problems. In A+ Core 1 scenarios, form factor matching is a key practical step when replacing motherboards. microATX is a common motherboard form factor that is smaller than ATX but typically uses standard ATX power connectors and is widely supported by cases designed for either microATX or larger layouts. While Mini-ITX can sometimes fit and use the same power supply, it is a less ideal replacement because it may reduce expandability. ATX may share power compatibility, but its larger dimensions create a case-fit risk. Best practice is to verify motherboard form factor, case support, mounting standoffs, rear I/O shield compatibility, and power connector type before installation, consistent with standard PC hardware documentation and motherboard/case manufacturer specifications.
- A. Correct.
Correct. A microATX motherboard is the best replacement because it matches the original form factor, is designed to use standard ATX-compatible power connectors, and will fit in cases that support microATX. In a real upgrade scenario, choosing the same form factor reduces compatibility risks with mounting points, rear I/O alignment, and internal clearances.
- B. Incorrect.
Incorrect. Mini-ITX boards are smaller and may physically fit in some cases, and many also use standard ATX power supplies. However, this is not the best choice here because the requirement is to replace a damaged microATX board while preserving compatibility as closely as possible. A Mini-ITX board may offer fewer expansion slots and different mounting locations, which can limit reuse of existing components.
- C. Incorrect.
Incorrect. An ATX motherboard commonly uses the same type of power supply as microATX, but it is physically larger. A case that supports microATX does not necessarily support full-size ATX. Selecting ATX without confirming chassis support could result in a board that does not fit or cannot be mounted properly.
- D. Incorrect.
Incorrect. NLX is an obsolete form factor and is not an appropriate modern replacement for a microATX office desktop. It is not a practical option for current A+ scenarios and would not be selected when reusing a standard contemporary case and power supply.