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: Current price sits CAD 21 above the strong-value threshold (~CAD 139)
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 CAD 160 the ASUS PRIME B550M-A AC is priced 7% below its CAD 172 representative market level. Only 2 verified new offers stand behind it, so the level can move quickly.
Consider: MSI B550M PRO-VDH WIFI offers stronger value around CAD 120.Compare
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) | ASUS | New | CAD 160 | 69 | 2026-11-09 | View offer → |
| ASUS PRIME B550M-A AC (Micro ATX) | Newegg | New | CAD 183 | 61 | 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 | CAD 105 | 53 | 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.
#410 of 698 graded motherboards
- #407 ASRockASRock B550M-ITX 62
- #408 ASUSASUS PRIME B550-PLUS AC-HES 62
- #409 ASUSASUS PRIME B550M-A 62
- #410 ASUSASUS PRIME B550M-A AC 62
- #411 ASUSASUS PRIME B550M-A WIFI II 62
- #412 ASUSASUS PRIME B550M-K 62
- #413 ASUSASUS PRIME B550M-K ARGB 62
Value Balanced
How much of that you get for today’s price.
#11 of 722 currently priced motherboards
- #8 GigabyteGigabyte B550 GAMING X V2 71
- #9 ASUSASUS B650E MAX GAMING WIFI 70
- #10 GigabyteGigabyte B650M GAMING PLUS WF 70
- #11 ASUSASUS PRIME B550M-A AC 69
- #12 MSIMSI PRO B760M-P 68
- #13 ASUSASUS PRIME B650-PLUS WIFI 67
- #14 ASUSASUS PRIME B550-PLUS AC-HES 67
Performance Gaming Build
How much it can do. Price plays no part in this ranking.
#478 of 680 graded motherboards
- #475 ASUSASUS A620M-AYW WIFI 72
- #476 ASUSASUS TUF GAMING A620-PRO WIFI 72
- #477 ASUSASUS PRIME B550M-A 72
- #478 ASUSASUS PRIME B550M-A AC 72
- #479 ASUSASUS PRIME B550M-A WIFI II 72
- #480 ASRockASRock H810M-X WiFi 72
- #481 ASUSASUS MAXIMUS IX HERO 72
Value Gaming Build
How much of that you get for today’s price.
#10 of 722 currently priced motherboards
- #7 ASUSASUS PRIME B550M-A WIFI II 81
- #8 GigabyteGigabyte B550 GAMING X V2 73
- #9 GigabyteGigabyte B650M GAMING PLUS WF 72
- #10 ASUSASUS PRIME B550M-A AC 71
- #11 ASUSASUS B650E MAX GAMING WIFI 70
- #12 ASUSASUS Prime B450M-A II 69
- #13 ASUSASUS PRIME B450M-A CSM 69
Performance Workstation
How much it can do. Price plays no part in this ranking.
#530 of 687 graded motherboards
- #527 MSIMSI B550M PRO-VDH WIFI 43
- #528 ASUSASUS ROG STRIX B460-H GAMING 43
- #529 ASUSASUS PRIME B550M-A 42
- #530 ASUSASUS PRIME B550M-A AC 42
- #531 ASUSASUS PRIME B550M-A WIFI II 42
- #532 GigabyteGigabyte B550M AORUS ELITE AX 42
- #533 GigabyteGigabyte B550M K 42
Value Workstation
How much of that you get for today’s price.
#57 of 722 currently priced motherboards
- #54 GigabyteGigabyte Z890 AORUS ELITE X ICE 81
- #55 MSIMSI MAG B850 GAMING PLUS MAX WIFI 80
- #56 ASUSASUS PRIME B860M-A WIFI-CSM 80
- #57 ASUSASUS PRIME B550M-A AC 80
- #58 ASUSASUS TUF GAMING B650-PLUS WIFI 80
- #59 MSIMSI B760 GAMING PLUS WIFI 80
- #60 ASUSASUS ROG STRIX Z690-F GAMING WIFI 80
Performance Small-Case Fit
How much it can do. Price plays no part in this ranking.
#139 of 698 graded motherboards
- #136 MSIMSI MPG B760M EDGE TI WIFI 72
- #137 ASRockASRock H810M-X WiFi 72
- #138 ASUSASUS PRIME B550M-A 71
- #139 ASUSASUS PRIME B550M-A AC 71
- #140 ASUSASUS PRIME B550M-A WIFI II 71
- #141 MSIMSI B550M PRO-VDH 71
- #142 MSIMSI B550M PRO-VDH WIFI 71
Value Small-Case Fit
How much of that you get for today’s price.
#10 of 722 currently priced motherboards
- #7 MSIMSI MPG B550 GAMING PLUS 74
- #8 MSIMSI PRO B760M-P 74
- #9 ASRockASRock B550M-ITX 72
- #10 ASUSASUS PRIME B550M-A AC 71
- #11 ASUSASUS PRIME B450M-A CSM 70
- #12 ASUSASUS Prime B450M-A II 70
- #13 ASRockASRock A520M-HDV 69
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 Value69 | Higher capability ASRock 90-MXBMS0-A0UAYZ 62 +25% capability · +3% price | Higher Value with current priorities MSI B550M PRO-VDH WIFI 100 +0% capability |
| Gaming BuildScenario capability | GradeC Value71 | Higher capability AsRock B850M Pro RS WiFi White B 36 +17% capability · +19% price | Higher Value with current priorities MSI B550M PRO-VDH WIFI C 100 +3% capability |
| WorkstationScenario capability | GradeD Value80 | Higher capability AsRock B850M Pro RS WiFi White C 38 +80% capability · +19% price | Higher Value with current priorities MSI B550M PRO-VDH WIFI D 100 +2% capability |
| Small-Case FitScenario capability | GradeC Value71 | Higher capability ASRock B550M-ITX A 72 +34% capability · -13% 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
- Strong-value threshold: ~CAD 139CAD 139 is where Relative Value reaches 80 with Balanced priorities, in the 2026-11-08–2026-11-09 offer frame
Consider other options if
- Current price sits CAD 21 above the strong-value threshold (~CAD 139)cheapest tracked CAD 160 against a CAD 139 calculated threshold with Balanced priorities
- Value for money matters more to you than this exact modelMSI B550M PRO-VDH WIFI holds Relative Value 100 against its 69 with Balanced priorities. Check on Amazon.
- 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
- Strong-value threshold: ~CAD 141CAD 141 is where Relative Value reaches 80 for Gaming Build, in the 2026-11-08–2026-11-09 offer frame
Consider other options if
- Not the pick if Gaming Build is your main useit grades C there; AsRock B850M Pro RS WiFi White grades B at CAD 190
- Current price sits CAD 19 above the strong-value threshold (~CAD 141)cheapest tracked CAD 160 against a CAD 141 calculated threshold for Gaming Build
- Value for money matters more to you than this exact modelMSI B550M PRO-VDH WIFI holds Relative Value 100 against its 71 for Gaming Build. Check on Amazon.
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 CAD 160 against a CAD 162 threshold for Workstation
Consider other options if
- Not the pick if Workstation is your main useit grades D there; AsRock B850M Pro RS WiFi White grades C at CAD 190
- Value for money matters more to you than this exact modelMSI B550M PRO-VDH WIFI holds Relative Value 100 against its 80 for Workstation. Check on Amazon.
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
- Strong-value threshold: ~CAD 142CAD 142 is where Relative Value reaches 80 for Small-Case Fit, in the 2026-11-08–2026-11-09 offer frame
Consider other options if
- Not the pick if Small-Case Fit is your main useit grades C there; ASRock B550M-ITX grades A at CAD 140
- Current price sits CAD 18 above the strong-value threshold (~CAD 142)cheapest tracked CAD 160 against a CAD 142 calculated threshold for Small-Case Fit
- Value for money matters more to you than this exact modelMSI B550M PRO-VDH WIFI holds Relative Value 100 against its 71 for Small-Case Fit. Check on Amazon.
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
- 90MB15K0-M0AAY0
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-11-08–2026-11-09
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 #410 by capability in the current modelled field. Its clearest measured strength is feature score 58. MSI B550M PRO-VDH WIFI currently clears the same practical bar with stronger Relative Value.
ASUS PRIME B550M-A AC offers C-grade capability for Gaming Build. It ranks #478 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 #530 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 #139 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 2026-11-08–2026-11-09 · 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.