ASUS PRIME B550M-A AC
The current ASUS PRIME B550M-A AC price from retailers, its key specifications, and how it performs for each job.
ASUS · MOBO · AM4
Retailer photo of ASUS PRIME B550M-A AC (Micro ATX). View this offer in Where to buy
Trade-offs: Not the pick if Workstation is your main use
Move a slider and the page re-scores this product against the same market frame.
What does it cost today, and is that a good price?
Market confidence: MediumAt $90 the ASUS PRIME B550M-A AC is priced 10% below its $100 representative market level. Only 2 verified new offers stand behind it, so the level can move quickly.
Price looks competitive: the cheapest verified offer is 10% below the current representative level.
Prices & availability
ASUS PRIME B550M-A AC: current price and offers
Compare the offers we track for this model, across variants and retailers.
3 tracked offers · 2 retailers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| ASUS PRIME B550M-A AC (Micro ATX) | Newegg | New | $90 | 88 | 2026-11-08 | View offer → |
| ASUS PRIME B550M-A AC (Micro ATX) | ASUS | New | $110 | 72 | 2026-11-09 | View offer → |
| ASUS PRIME B550M-A ACMultiple variants available | Amazon Affiliate | Varies | Find on Amazon | Not tracked | No price snapshot | Find on Amazon → |
Prices are dated snapshots, not live quotes — confirm the final price at the store. New, refurbished and used offers are listed separately; used offers carry warranty and seller risk.
Show the other 1 tracked offers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| ASUS PRIME B550M-A AC (Micro ATX) | Newegg | Used | $77 | 100 | 2026-11-08 | View offer → |
Performance and where it ranks
Two different questions, side by side. Performance compares what the hardware can do; Value compares what that capability costs at today’s price. A product can rank high on one and low on the other — that gap is the point.
Performance Balanced
How much it can do. Price plays no part in this ranking.
#525 of 967 graded motherboards
- #522 ASUSASUS 90MB14G0-M0EAY0 62
- #523 ASUSASUS PRIME B550-PLUS AC-HES 62
- #524 ASUSASUS PRIME B550M-A 62
- #525 ASUSASUS PRIME B550M-A AC 62
- #526 ASUSASUS PRIME B550M-A WIFI II 62
- #527 ASUSASUS PRIME B550M-K 62
- #528 ASUSASUS PRIME B550M-K ARGB 62
Value Balanced
How much of that you get for today’s price.
#4 of 1015 currently priced motherboards
- #1 GigabyteGigabyte B650M GAMING PLUS WF 100
- #2 MSIMSI B550M PRO-VDH WIFI 95
- #3 ASUSASUS b650em-max-gaming-wifi 89
- #4 ASUSASUS PRIME B550M-A AC 88
- #5 ASRockASRock B650 PG LIGHTNING 88
- #6 ASUSASUS ROG STRIX B650-A GAMING WIFI 82
- #7 ASRockASRock 90-MXBMS0-A0UAYZ 82
Performance Gaming Build
How much it can do. Price plays no part in this ranking.
#639 of 949 graded motherboards
- #636 ASUSASUS PRIME B450M-A CSM 72
- #637 MSIMSI B450 TOMAHAWK 72
- #638 ASUSASUS PRIME B550M-A 72
- #639 ASUSASUS PRIME B550M-A AC 72
- #640 ASUSASUS PRIME B550M-A WIFI II 72
- #641 ASRockASRock H810M-X 72
- #642 MSIMSI PRO H810M-B 72
Value Gaming Build
How much of that you get for today’s price.
#5 of 1015 currently priced motherboards
- #2 MSIMSI B550M PRO-VDH WIFI 93
- #3 ASRockASRock B650 PG LIGHTNING 89
- #4 ASUSASUS b650em-max-gaming-wifi 88
- #5 ASUSASUS PRIME B550M-A AC 88
- #6 ASRockASRock 90-MXBMS0-A0UAYZ 85
- #7 GigabyteGigabyte B550M K 83
- #8 ASUSASUS ROG STRIX B650-A GAMING WIFI 80
Performance Workstation
How much it can do. Price plays no part in this ranking.
#706 of 949 graded motherboards
- #703 ASUSASUS TUF GAMING B460M-PLUS 43
- #704 GigabyteGigabyte B660M DS3H DDR4 43
- #705 ASUSASUS PRIME B550M-A 42
- #706 ASUSASUS PRIME B550M-A AC 42
- #707 ASUSASUS PRIME B550M-A WIFI II 42
- #708 GigabyteGigabyte B550M AORUS ELITE AX 42
- #709 GigabyteGigabyte B550M K 42
Value Workstation
How much of that you get for today’s price.
#25 of 1015 currently priced motherboards
- #22 GigabyteGigabyte Z790M AORUS ELITE AX ICE 83
- #23 ASUSASUS B650E MAX GAMING WIFI 82
- #24 ASUSASUS B650E MAX GAMING WIFI W 82
- #25 ASUSASUS PRIME B550M-A AC 82
- #26 ASUSASUS PRIME B650M-A WIFI II 81
- #27 MSIMSI MPG Z790 CARBON WIFI 81
- #28 GigabyteGigabyte B860 EAGLE WIFI6E 80
Performance Small-Case Fit
How much it can do. Price plays no part in this ranking.
#194 of 967 graded motherboards
- #191 ASRockASRock H810M-X 71
- #192 MSIMSI PRO H810M-B 71
- #193 ASUSASUS PRIME B550M-A 70
- #194 ASUSASUS PRIME B550M-A AC 70
- #195 ASUSASUS PRIME B550M-A WIFI II 70
- #196 MSIMSI B550M PRO-VDH 70
- #197 MSIMSI B550M PRO-VDH WIFI 70
Value Small-Case Fit
How much of that you get for today’s price.
#3 of 1015 currently priced motherboards
- #1 MSIMSI B550M PRO-VDH WIFI 100
- #2 GigabyteGigabyte B650M GAMING PLUS WF 99
- #3 ASUSASUS PRIME B550M-A AC 95
- #4 ASRockASRock A620AM-HVS 93
- #5 ASRockASRock B760M Pro-A D4 92
- #6 GigabyteGigabyte B550M K 89
- #7 GigabyteGigabyte H610M S2H V2 89
These ladders follow the preset scenario shown above. Your own weights re-score this product, not the whole field.
What it is good for
| Scenario | this productCapability grade · Value at current price | Higher capability | Higher Value with current priorities |
|---|---|---|---|
| Balanced (all-round)Weighted all-round view | GradeNo grade Value88 | Higher capability ASRock 90-MXBMS0-A0UAYZ 82 +25% capability | Higher Value with current priorities MSI B550M PRO-VDH WIFI 95 +0% capability |
| Gaming BuildScenario capability | GradeC Value88 | Higher capability ASRock B650 PG LIGHTNING A 89 +22% capability · +11% price | Higher Value with current priorities MSI B550M PRO-VDH WIFI C 93 +3% capability |
| WorkstationScenario capability | GradeD Value82 | Higher capability ASRock B650 PG LIGHTNING B 87 +88% capability · +11% price | Higher Value with current priorities MSI B550M PRO-VDH WIFI D 88 +2% capability |
| Small-Case FitScenario capability | GradeC Value95 | Higher capability Gigabyte B650M GAMING PLUS WF C 99 +7% capability · +11% price | Higher Value with current priorities MSI B550M PRO-VDH WIFI C 100 +0% capability |
Balanced has no letter: it is a weighting preset, not a capability rubric. A grade answers “how well does this handle that job?” — price is never part of it. Relative Value puts the current market price back in.
Compare these grades with the full tier list
Browse shortlists for different uses
Trade-offs
Works well if
- Gaming Build is your main prioritygraded C for Gaming Build on the same rubric as the tier list
- Today's price already clears the strong-value markcheapest tracked $90 against a $99 threshold with Balanced priorities
Consider other options if
- Not the pick if Workstation is your main useit grades only D there
For the selected scenario this is not a strong fit — the grade above is the reason, and the models below suit it better.
Works well if
- Today's price already clears the strong-value markcheapest tracked $90 against a $98 threshold for Gaming Build
Consider other options if
- Not the pick if Gaming Build is your main useit grades C there; ASRock B650 PG LIGHTNING grades A at $100
- You are buying for Gaming Build and want no asterisksthe rubric caps this grade: previous-generation socket — limited cpu upgrade path
For the selected scenario this is not a strong fit — the grade above is the reason, and the models below suit it better.
Works well if
- Workstation is not actually your main job — Gaming Build isit grades D for Workstation, but C for Gaming Build
- Today's price already clears the strong-value markcheapest tracked $90 against a $94 threshold for Workstation
Consider other options if
- Not the pick if Workstation is your main useit grades D there; ASRock B650 PG LIGHTNING grades B at $100
For the selected scenario this is not a strong fit — the grade above is the reason, and the models below suit it better.
Works well if
- Small-Case Fit is not actually your main job — Gaming Build isit grades C for Small-Case Fit, but C for Gaming Build
- Today's price already clears the strong-value markcheapest tracked $90 against a $106 threshold for Small-Case Fit
Consider other options if
- Not the pick if Small-Case Fit is your main useit grades C there; Gigabyte B650M GAMING PLUS WF grades C at $100
- You are buying for Small-Case Fit and want no asterisksthe rubric caps this grade: micro atx — fits compact mid-size cases
Every line states the fact it was derived from, for the scenario selected above. Thresholds are calculated points on our value curve — information about where the maths turns, not instructions about what to pay.
Similar options to the ASUS PRIME B550M-A AC
Chosen for Balanced
Chosen for Gaming Build
Chosen for Workstation
Chosen for Small-Case Fit
Alternatives stay near this product’s price range. Step-up options may exceed the standard budget envelope when the capability gain is meaningful.
More head-to-head comparisons in this category
Upgrade planner
Judge the change in the active scenario, then make the cash gap explicit.
Using page scenarioWhat are you upgrading from? These are the axes we compare on, and where this product stands in the current market.
Capability differences are expressed as tiers and index points, not as benchmark percentages we did not measure.
Specifications and compatibility
What this product is, and what to check before it goes into your build.
Memory
Power / Interface
Physical / Outputs
- M.2 slots
- 2
- SATA ports
- 4
- PCIe ×16 slots
- 1
- USB ports
- 3
- Wi-Fi
- Wi-Fi 5 Bluetooth v5.0
- Ethernet
- 1 Gb/s
Show all specifications
Features
- Fan headers
- 4
- RAID
- Yes
- ARGB headers
- Yes
Warranty
- Warranty
- 3 years
- Manufacturer part number
- PRIME B550M-A AC
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-11-02–2026-11-09
What to check in your build
AM4
Takes AM4 processors — a matching socket is necessary but not sufficient, check the vendor's CPU support list
Micro ATX
Micro ATX — the case must accept this size
DDR4 · 4 slots · up to 128 GB
Takes DDR4 memory only — another DDR generation does not fit the slots
Found an error? Report this specification Email the field, corrected value and an optional source.
Compatibility guidance is practical help, not a score. Missing data is shown as unknown, never invented.
Summary
ASUS PRIME B550M-A AC offers a balanced view across an all-round mix of priorities. It ranks #525 by capability in the current modelled field. Its clearest measured strength is feature score 58. Gigabyte B550M K currently clears the same practical bar with stronger Relative Value.
ASUS PRIME B550M-A AC offers C-grade capability for Gaming Build. It ranks #639 by capability in the current modelled field. Its clearest measured strength is feature score 58. The C grade is the decisive limitation for this workload.
ASUS PRIME B550M-A AC offers D-grade capability for Workstation. It ranks #706 by capability in the current modelled field. Its clearest measured strength is feature score 58. The D grade is the decisive limitation for this workload.
ASUS PRIME B550M-A AC offers C-grade capability for Small-Case Fit. It ranks #194 by capability in the current modelled field. Its clearest measured strength is feature score 58. The C grade is the decisive limitation for this workload.
FAQ
Why does Relative Value change when I choose another scenario?
Each scenario changes the weights applied to capability, price and the other published factors. The hardware facts stay fixed, but the value question changes, so its score and rank can change too.
Why can Amazon appear without a tracked price?
Amazon listing snapshots can participate in Value while fresh. We show Check on Amazon instead of its price; confirm the current price and availability at the store. When no current listing snapshot exists, Amazon is a search link only.
Useful links & sources
offer frame 2026-11-02–2026-11-09 · formula mobo-value-v6.1 · facts facts-2026-11-09 · Relative Value is an estimate from our current dataset, the selected weights and dated market prices — not an official product rating and not a price forecast. Target prices are calculation thresholds, not predictions. Methodology We are not a shop. Affiliate links may earn us a commission; they never change the calculations or the ranking.