Resource Cheatsheet
A+ Core 1 3.5: Motherboard Compatibility
A+ Core 1 3.5 — Intel vs AMD sockets, zero-force CPU install, and multisocket server motherboards.
- Updated
- Reading time
- 3 min read
- Detail
- A+ Core 1
- Detail
- Motherboard Compatibility
On this page
In one line: the CPU brand picks the board — AMD CPU needs an AMD socket, Intel CPU needs an Intel socket — and server boards add multiple CPUs, more RAM slots and rack-fit size.
Companion to: Professor Messer A+ Core 1 (220-1201), Section 3, objective 3.5. The full version is the Motherboard Compatibility class notes; the section overview is the Section 3 sheet.
Intel vs AMD
| Intel | AMD | |
|---|---|---|
| Role (traditional) | Higher performance | Lower cost |
| Reality | Lead switches generation to generation — compare the actual parts | Same |
| Socket | Intel socket only | AMD socket only |
| Interchangeable? | No — an Intel CPU won’t fit an AMD board or vice versa | No |
| Socket style* | LGA (pins in socket) | PGA on older AM4; LGA on AM5 |
*Beyond this lesson — the exam here just asks you to match brand to socket.
Rule: the CPU you choose chooses the motherboard.
Installing a CPU
- No force. Rest the CPU in the socket (orientation marker aligned), close the cover, lock the lever.
- Force means misalignment — stop, don’t press. Bent pins are usually fatal.
Desktop vs server board
| Feature | Desktop | Server |
|---|---|---|
| CPUs | Single socket | Multisocket (2+ physical CPUs) |
| RAM slots | 2–4 | Many (4, 6 or more) |
| RAM type | Usually non-ECC | Usually ECC (see 3.3) |
| Expansion | Few | Many |
| Form factor / mount | Any | Large, full-size, fits a 19-inch rack |
🔐 Security notes
- The CPU platform is a firmware platform: microcode and management engines (Intel ME, AMD PSP) sit below the OS, and their fixes arrive via the board’s BIOS/UEFI updates — patch firmware, not just the OS.
- Server boards usually carry a BMC (IPMI): out-of-band management that can power-cycle, mount virtual media and see the console independent of the OS. Exposed or default-credentialled BMCs = full control. Isolate the management network, change defaults, patch it.
- Multisocket = concentration: one board often runs many VMs, so a compromise or physical attack reaches far more than a desktop.
Practice drills
1. Which two companies make PC CPUs?
Intel and AMD.
2. Why does the CPU brand decide the motherboard?
Intel and AMD use different sockets, so the CPU only fits a board with its matching socket.
3. Can you fit an AMD CPU to an Intel-socket board?
No — the sockets are physically different and not interchangeable.
4. How much force should installing a CPU take?
None — rest it in the socket, close the cover, lock the lever. Force means it’s misaligned.
5. What does "multisocket" mean and where is it used?
More than one physical CPU on one board — used on server motherboards for extra processing power.
6. Two ways a server board scales beyond a desktop board?
More RAM slots (4, 6 or more) and more expansion slots (plus multiple CPU sockets).
7. What form factor and mounting do server boards favour?
Large, full-size ATX-style boards built to fit a 19-inch rack.
Key takeaways
- CPU brand picks the board: AMD CPU → AMD socket, Intel CPU → Intel socket; never interchangeable.
- Price/performance stereotype shifts — compare the actual parts today.
- Install with zero force: seat, close cover, lock lever.
- Server boards: multisocket, many RAM slots (often ECC), lots of expansion, rack-fit full-size.
- Security: patch platform firmware; isolate and harden server BMC/IPMI management.