ASUS Prime B450M-A II
The current ASUS Prime B450M-A II price from retailers, its key specifications, and how it performs for each job.
ASUS · MOBO · AM4
Retailer photo of ASUS Prime B450M-A II (Micro ATX). View this offer in Where to buy
Trade-offs: Current price sits CAD 25 above the strong-value threshold (~CAD 105)
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 130 the ASUS Prime B450M-A II is priced 26% below its CAD 176 representative market level. Only 2 verified new offers stand behind it, so the level can move quickly.
Consider: ASRock B550 Phantom Gaming 4 offers stronger value around CAD 118.Compare
Prices & availability
ASUS Prime B450M-A II: current price and offers
Compare the offers we track for this model, across variants and retailers.
2 tracked offers · 2 retailers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| ASUS Prime B450M-A II (Micro ATX) | ASUS | New | CAD 130 | 64 | 2026-11-09 | View offer → |
| ASUS Prime B450M-A II (Micro ATX) | Newegg | New | CAD 222 | 38 | 2026-11-08 | View offer → |
| ASUS Prime B450M-A IIMultiple 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.
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.
#388 of 698 graded motherboards
- #385 ASUSASUS B450-PLUS GAMING 62
- #386 ASUSASUS B450M-PRO GAMING 62
- #387 ASUSASUS PRIME B450-PLUS 62
- #388 ASUSASUS Prime B450M-A II 62
- #389 ASUSASUS PRIME B450M-A CSM 62
- #390 ASUSASUS PRIME B450M-K II 62
- #391 ASUSASUS STRIX B450-F GAMING 62
Value Balanced
How much of that you get for today’s price.
#21 of 722 currently priced motherboards
- #18 ASUSASUS Pro B550M-C 65
- #19 ASUSASUS ROG STRIX B650-A GAMING WIFI 65
- #20 ASUSASUS B650E MAX GAMING WIFI W 64
- #21 ASUSASUS Prime B450M-A II 64
- #22 ASUSASUS Z790-AYW WIFI W II 64
- #23 ASUSASUS PRIME Z890M-PLUS WIFI 63
- #24 ASUSASUS PRIME B760M-A AX 62
Performance Gaming Build
How much it can do. Price plays no part in this ranking.
#328 of 680 graded motherboards
- #325 ASUSASUS PROART B650-CREATOR 81
- #326 GigabyteGigabyte B850 GAMING WIFI6 81
- #327 ASUSASUS 90MB1D20-M0AAY0 81
- #328 ASUSASUS Prime B450M-A II 80
- #329 ASUSASUS PRIME B450M-A CSM 80
- #330 ASUSASUS CROSSHAIR VI EXTREME 80
- #331 ASUSASUS PRIME X370-PRO 80
Value Gaming Build
How much of that you get for today’s price.
#12 of 722 currently priced motherboards
- #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
- #14 ASUSASUS Pro B550M-C 68
- #15 ASUSASUS PRIME B550-PLUS AC-HES 68
Performance Workstation
How much it can do. Price plays no part in this ranking.
#442 of 687 graded motherboards
- #439 MSIMSI MPG Z390M GAMING EDGE AC 56
- #440 ASUSASUS PRIME Z490M-PLUS 56
- #441 ASUSASUS TUF GAMING A620AM-PLUS WIFI 55
- #442 ASUSASUS Prime B450M-A II 55
- #443 ASUSASUS PRIME B450M-A CSM 55
- #444 ASRockASRock B550 PRO4 55
- #445 GigabyteGigabyte B650M D3HP 55
Value Workstation
How much of that you get for today’s price.
#161 of 722 currently priced motherboards
- #158 MSIMSI MPG X870E EDGE TI WIFI 68
- #159 ASUSASUS 90MB1P60-M0EAY0 68
- #160 ASUSASUS rog-strix-x870e-h-gaming-wifi7-hatsune-miku-edition 68
- #161 ASUSASUS Prime B450M-A II 68
- #162 GigabyteGigabyte X870E A ELITE X 68
- #163 GigabyteGigabyte Z890 UD WIFI6E 68
- #164 ASUSASUS TUF GAMING A520M-PLUS WIFI 67
Performance Small-Case Fit
How much it can do. Price plays no part in this ranking.
#155 of 698 graded motherboards
- #152 ASRockASRock B450M PRO4 R2.0 70
- #153 ASRockASRock B450M Steel Legend 70
- #154 ASUSASUS B450M-PRO GAMING 70
- #155 ASUSASUS Prime B450M-A II 70
- #156 ASUSASUS PRIME B450M-A CSM 70
- #157 ASUSASUS PRIME B450M-K II 70
- #158 ASUSASUS TUF GAMING B450M-PRO II 70
Value Small-Case Fit
How much of that you get for today’s price.
#12 of 722 currently priced motherboards
- #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
- #14 MSIMSI A520M-A PRO 69
- #15 ASUSASUS B760M-AYW WIFI D4 II 68
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 Value64 | — | Higher Value with current priorities MSI B550M PRO-VDH WIFI 100 +0% capability |
| Gaming BuildScenario capability | GradeB Value69 | — | Higher Value with current priorities MSI B550M PRO-VDH WIFI C 100 -7% capability |
| WorkstationScenario capability | GradeD Value68 | Higher capability ASUS TUF GAMING B450M-PRO S C 75 +19% capability · +19% price | Higher Value with current priorities Gigabyte B550M GAMING X WIFI6 D 91 +2% capability · -12% price |
| Small-Case FitScenario capability | GradeC Value70 | Higher capability ASRock B550M-ITX A 72 +36% capability · +8% price | Higher Value with current priorities MSI B550M PRO-VDH WIFI C 100 +1% 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 B for Gaming Build on the same rubric as the tier list
- Strong-value threshold: ~CAD 105CAD 105 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 25 above the strong-value threshold (~CAD 105)cheapest tracked CAD 130 against a CAD 105 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 64 with Balanced priorities. Check on Amazon.
- Not the pick if Workstation is your main useit grades only D there
Works well if
- Gaming Build is your main prioritygraded B for Gaming Build on the same rubric as the tier list
- Strong-value threshold: ~CAD 112CAD 112 is where Relative Value reaches 80 for Gaming Build, in the 2026-11-08–2026-11-09 offer frame
Consider other options if
- Current price sits CAD 18 above the strong-value threshold (~CAD 112)cheapest tracked CAD 130 against a CAD 112 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 69 for Gaming Build. 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
- Workstation is not actually your main job — Gaming Build isit grades D for Workstation, but B for Gaming Build
- Strong-value threshold: ~CAD 93CAD 93 is where Relative Value reaches 80 for Workstation, in the 2026-11-08–2026-11-09 offer frame
Consider other options if
- Not the pick if Workstation is your main useit grades D there; ASUS TUF GAMING B450M-PRO S grades C at CAD 155
- Current price sits CAD 37 above the strong-value threshold (~CAD 93)cheapest tracked CAD 130 against a CAD 93 calculated threshold for Workstation
- Value for money matters more to you than this exact modelGigabyte B550M GAMING X WIFI6 holds Relative Value 91 against its 68 for Workstation, at CAD 115
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 B for Gaming Build
- Strong-value threshold: ~CAD 113CAD 113 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 17 above the strong-value threshold (~CAD 113)cheapest tracked CAD 130 against a CAD 113 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 70 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 B450M-A II
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
- 6
- PCIe ×16 slots
- 1
- USB ports
- 3
- Ethernet
- 1 Gb/s
Show all specifications
Features
- RAID
- Yes
Warranty
- Warranty
- 3 years
- Manufacturer part number
- 90MB15Z0-MVAAY0
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 B450M-A II offers a balanced view across an all-round mix of priorities. It ranks #388 by capability in the current modelled field. Its clearest measured strength is feature score 45. ASRock B550 Phantom Gaming 4 currently clears the same practical bar with stronger Relative Value.
ASUS Prime B450M-A II offers B-grade capability for Gaming Build. It ranks #328 by capability in the current modelled field. Its clearest measured strength is feature score 45. The main limitation appears when Workstation becomes the priority, where it grades D.
ASUS Prime B450M-A II offers D-grade capability for Workstation. It ranks #442 by capability in the current modelled field. Its clearest measured strength is feature score 45. The D grade is the decisive limitation for this workload.
ASUS Prime B450M-A II offers C-grade capability for Small-Case Fit. It ranks #155 by capability in the current modelled field. Its clearest measured strength is feature score 45. 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.