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: you want strong value with Balanced priorities specifically
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: Gigabyte B550M GAMING X WIFI6 offers stronger value around CAD 115.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 | 45 | 2026-10-29 | View offer → |
| ASUS Prime B450M-A II (Micro ATX) | Newegg | New | CAD 222 | 31 | 2026-10-29 | 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.
#389 of 703 graded motherboards
- #386 ASUSASUS 90MB0Z50-M0EAY0 62
- #387 ASUSASUS B450-PLUS GAMING 62
- #388 ASUSASUS PRIME B450-PLUS 62
- #389 ASUSASUS Prime B450M-A II 62
- #390 ASUSASUS PRIME B450M-A CSM 62
- #391 ASUSASUS PRIME B450M-K II 62
- #392 ASUSASUS STRIX B450-F GAMING 62
Value Balanced
How much of that you get for today’s price.
#249 of 727 currently priced motherboards
- #246 GigabyteGigabyte Z690 AORUS PRO 45
- #247 ASUSASUS ROG STRIX Z890-F GAMING WIFI 45
- #248 MSIMSI MEG X570 UNIFY 45
- #249 ASUSASUS Prime B450M-A II 45
- #250 ASUSASUS PRIME Z490M-PLUS 45
- #251 MSIMSI PRO Z790-A WIFI DDR4 44
- #252 MSIMSI MEG Z490 UNIFY 44
Performance Gaming Build
How much it can do. Price plays no part in this ranking.
#329 of 685 graded motherboards
- #326 GigabyteGigabyte B850 GAMING WIFI6 81
- #327 ASUSASUS ROG Crosshair VIII Dark Hero 81
- #328 ASUSASUS 90MB1D20-M0AAY0 81
- #329 ASUSASUS Prime B450M-A II 80
- #330 ASUSASUS PRIME B450M-A CSM 80
- #331 ASUSASUS CROSSHAIR VI EXTREME 80
- #332 ASUSASUS PRIME X399-A 80
Value Gaming Build
How much of that you get for today’s price.
#389 of 727 currently priced motherboards
- #386 ASUSASUS Pro B860M-CT-CSM 28
- #387 GigabyteGigabyte Z490 AORUS XTREME 28
- #388 ASUSASUS Prime X470-Pro 27
- #389 ASUSASUS Prime B450M-A II 27
- #390 MSIMSI Z370 TOMAHAWK 27
- #391 GigabyteGigabyte Z790 S WIFI DDR4 27
- #392 ASUSASUS PRIME B760-PLUS 27
Performance Workstation
How much it can do. Price plays no part in this ranking.
#433 of 680 graded motherboards
- #430 MSIMSI MPG Z390M GAMING EDGE AC 56
- #431 ASUSASUS PRIME Z490M-PLUS 56
- #432 ASUSASUS TUF GAMING A620AM-PLUS WIFI 55
- #433 ASUSASUS Prime B450M-A II 55
- #434 ASUSASUS PRIME B450M-A CSM 55
- #435 ASRockASRock B550 PRO4 55
- #436 GigabyteGigabyte B650M D3HP 55
Value Workstation
How much of that you get for today’s price.
#513 of 727 currently priced motherboards
- #510 ASUSASUS ROG STRIX B760-A GAMING WIFI D4 9
- #511 GigabyteGigabyte B550M K 9
- #512 MSIMSI B450M MORTAR MAX 9
- #513 ASUSASUS Prime B450M-A II 9
- #514 ASUSASUS TUF Z370 Plus Gaming 9
- #515 GigabyteGigabyte X870I AORUS PRO ICE 9
- #516 ASUSASUS STRIX Z270G 9
Performance Small-Case Fit
How much it can do. Price plays no part in this ranking.
#156 of 703 graded motherboards
- #153 MSIMSI B350M BAZOOKA 70
- #154 ASRockASRock B450 STEEL LEGEND 70
- #155 ASRockASRock B450M PRO4 R2.0 70
- #156 ASUSASUS Prime B450M-A II 70
- #157 ASUSASUS PRIME B450M-A CSM 70
- #158 ASUSASUS PRIME B450M-K II 70
- #159 ASUSASUS TUF B450M-PRO GAMING 70
Value Small-Case Fit
How much of that you get for today’s price.
#135 of 727 currently priced motherboards
- #132 ASRockASRock B650 Pro RS WiFi 39
- #133 ASUSASUS Pro WS B850M-ACE SE 39
- #134 ASUSASUS B650E MAX GAMING WIFI W 38
- #135 ASUSASUS Prime B450M-A II 38
- #136 MSIMSI MPG Z390M GAMING EDGE AC 38
- #137 ASUSASUS ROG STRIX Z490-I GAMING 38
- #138 ASUSASUS ROG STRIX X870-A GAMING WIFI 38
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 Value45 | Higher capability ASRock 90-MXBMS0-A0UAYZ 62 +25% capability | Higher Value with current priorities MSI B550M PRO-VDH WIFI 92 +0% capability |
| Gaming BuildScenario capability | GradeB Value27 | — | Higher Value with current priorities MSI B550M PRO-VDH WIFI C 58 -7% capability |
| WorkstationScenario capability | GradeD Value9 | Higher capability ASUS TUF GAMING B450M-PRO S C 16 +19% capability · +19% price | Higher Value with current priorities Gigabyte B550M GAMING X WIFI6 D 20 +2% capability · -12% price |
| Small-Case FitScenario capability | GradeC Value38 | Higher capability ASRock B550M-ITX A 35 +36% capability · +15% price | Higher Value with current priorities MSI B550M PRO-VDH WIFI C 88 +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
Consider other options if
- You want strong value with Balanced priorities specificallyat today's market no realistic price for this model reaches strong value with Balanced priorities — the calculation only gets there near CAD 57, against a cheapest tracked CAD 130
- Value for money matters more to you than this exact modelMSI B550M PRO-VDH WIFI holds Relative Value 92 against its 45 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
Consider other options if
- You want strong value for Gaming Build specificallycompeting products deliver so much more for Gaming Build per dollar that no price this model realistically trades at reaches the strong-value mark for this job
- Value for money matters more to you than this exact modelMSI B550M PRO-VDH WIFI holds Relative Value 58 against its 27 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
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
- Value for money matters more to you than this exact modelGigabyte B550M GAMING X WIFI6 holds Relative Value 20 against its 9 for Workstation, at CAD 115
- You are buying for Workstation and want no asterisksthe rubric caps this grade: expansion data not collected for this board — graded on platform only
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
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 150
- You want strong value for Small-Case Fit specificallycompeting products deliver so much more for Small-Case Fit per dollar that no price this model realistically trades at reaches the strong-value mark for this job
- Value for money matters more to you than this exact modelMSI B550M PRO-VDH WIFI holds Relative Value 88 against its 38 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 2026-10-29
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 #389 by capability in the current modelled field. Its clearest measured strength is feature score 45. Gigabyte B550M GAMING X WIFI6 currently clears the same practical bar with stronger Relative Value.
ASUS Prime B450M-A II offers B-grade capability for Gaming Build. It ranks #329 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 #433 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 #156 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 2026-10-29 · formula mobo-value-v1.4 · facts facts-2026-10-29 · 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.