ASUS PRIME B550M-K
The current ASUS PRIME B550M-K price from retailers, its key specifications, and how it performs for each job.
ASUS · MOBO · AM4
Retailer photo of ASUS PRIME B550M-K (Micro ATX). View this offer in Where to buy
Trade-offs: Current price sits $32 above the strong-value threshold (~$73)
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 $105 the ASUS PRIME B550M-K is priced 17% below its $126 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 $90.Compare
Prices & availability
ASUS PRIME B550M-K: 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 B550M-K (Micro ATX) | Newegg | New | $105 | 56 | 2026-11-10 | View offer → |
| ASUS PRIME B550M-K (Micro ATX) | MemoryC | New | $146 | 40 | 2026-11-14 | View offer → |
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.
#551 of 1030 graded motherboards
- #548 ASUSASUS PRIME B550M-A 62
- #549 ASUSASUS PRIME B550M-A AC 62
- #550 ASUSASUS PRIME B550M-A WIFI II 62
- #551 ASUSASUS PRIME B550M-K 62
- #552 ASUSASUS PRIME B550M-K ARGB 62
- #553 ASUSASUS Pro B550M-C 62
- #554 ASUSASUS ROG STRIX B550-E GAMING 62
Value Balanced
How much of that you get for today’s price.
#96 of 1072 currently priced motherboards
- #93 GigabyteGigabyte B650M AORUS ELITE AX ICE 56
- #94 ASUSASUS PRIME B860M-A WIFI-CSM 56
- #95 ASUSASUS tuf-gaming-b550m-plus 56
- #96 ASUSASUS PRIME B550M-K 56
- #97 MSIMSI Z490-A PRO 55
- #98 GigabyteGigabyte Z890 EAGLE WIFI7 55
- #99 MSIMSI PRO B760M-P 55
Performance Gaming Build
How much it can do. Price plays no part in this ranking.
#507 of 926 graded motherboards
- #504 MSIMSI B450M-A PRO MAX 75
- #505 ASRockASRock B550M-HVS SE90-MXBMK0-A0UAYZ 75
- #506 ASRockASRock B550M-ITX 75
- #507 ASUSASUS PRIME B550M-K 75
- #508 ASUSASUS PRIME B550M-K ARGB 75
- #509 ASUSASUS Pro B550M-C 75
- #510 ASUSASUS TUF GAMING B550M-E WIFI 75
Value Gaming Build
How much of that you get for today’s price.
#70 of 1072 currently priced motherboards
- #67 ASRockASRock B650M PG Lightning 59
- #68 GigabyteGigabyte B850 GAMING WIFI6 59
- #69 GigabyteGigabyte Z790 EAGLE AX 59
- #70 ASUSASUS PRIME B550M-K 58
- #71 ASUSASUS PRIME B850M-A WIFI-CSM 58
- #72 GigabyteGigabyte Z390 UD 58
- #73 GigabyteGigabyte Z490 AORUS ELITE 58
Performance Workstation
How much it can do. Price plays no part in this ranking.
#689 of 988 graded motherboards
- #686 GigabyteGigabyte X470 AORUS ULTRA GAMING 45
- #687 MSIMSI B450M PRO-VDH PLUS 44
- #688 ASRockASRock B550 Phantom Gaming 4 44
- #689 ASUSASUS PRIME B550M-K 44
- #690 ASUSASUS PRIME B550M-K ARGB 44
- #691 ASUSASUS TUF X470-Plus Gaming 44
- #692 ASUSASUS Pro B760M-C-CSM 44
Value Workstation
How much of that you get for today’s price.
#312 of 1072 currently priced motherboards
- #309 GigabyteGigabyte Z390 UD 56
- #310 MSIMSI MPG X570 GAMING PLUS 56
- #311 GigabyteGigabyte B650I AORUS ULTRA 56
- #312 ASUSASUS PRIME B550M-K 56
- #313 MSIMSI MEG X570 UNIFY 56
- #314 MSIMSI Z370 GAMING M5 56
- #315 ASRockASRock B550M-HDV 56
Performance Small-Case Fit
How much it can do. Price plays no part in this ranking.
#234 of 1030 graded motherboards
- #231 MSIMSI B450M-A PRO MAX 69
- #232 ASRockASRock B550M-HDV 69
- #233 ASRockASRock B550M-HVS SE90-MXBMK0-A0UAYZ 69
- #234 ASUSASUS PRIME B550M-K 69
- #235 ASUSASUS PRIME B550M-K ARGB 69
- #236 ASUSASUS Pro B550M-C 69
- #237 ASUSASUS TUF GAMING B550M-E WIFI 69
Value Small-Case Fit
How much of that you get for today’s price.
#58 of 1072 currently priced motherboards
- #55 ASUSASUS Strix Z370-F Gaming 64
- #56 MSIMSI B450M MORTAR MAX 64
- #57 MSIMSI PRO H610M-E 64
- #58 ASUSASUS PRIME B550M-K 63
- #59 ASUSASUS PRIME B550M-A 63
- #60 MSIMSI PRO B760M-P 63
- #61 GigabyteGigabyte A620M S2H 63
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 Value56 | Higher capability ASRock B650 PG LIGHTNING 88 +25% capability · -5% price | Higher Value with current priorities Gigabyte B650M GAMING PLUS WF 100 +25% capability · -5% price |
| Gaming BuildScenario capability | GradeB
Value58 | Higher capability ASRock B650M-HDV A 81 +20% capability | Higher Value with current priorities Gigabyte B650M GAMING PLUS WF B 100 +12% capability · -5% price |
| WorkstationScenario capability | GradeD
Value56
| Higher capability ASRock B650 PG Lightning WiFi B 80 +83% capability · +14% price | Higher Value with current priorities Gigabyte B650M GAMING PLUS WF C 100 +48% capability · -5% price |
| Small-Case FitScenario capability | GradeC
Value63
| Higher capability ASRock A620AI WiFi S 86 +37% capability · +14% 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: ~$73$73 is where Relative Value reaches 80 with Balanced priorities, in the 2026-11-08–2026-11-14 offer frame
Consider other options if
- Current price sits $32 above the strong-value threshold (~$73)cheapest tracked $105 against a $73 calculated threshold with Balanced priorities
- Value for money matters more to you than this exact modelGigabyte B650M GAMING PLUS WF holds Relative Value 100 against its 56 with Balanced priorities, at $100
- 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: ~$77$77 is where Relative Value reaches 80 for Gaming Build, in the 2026-11-08–2026-11-14 offer frame
Consider other options if
- Current price sits $28 above the strong-value threshold (~$77)cheapest tracked $105 against a $77 calculated threshold for Gaming Build
- Value for money matters more to you than this exact modelGigabyte B650M GAMING PLUS WF holds Relative Value 100 against its 58 for Gaming Build, at $100
- 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; ASRock B650 PG Lightning WiFi grades B at $120
- You want strong value for Workstation specificallyat today's market no realistic price for this model reaches strong value for Workstation — the calculation only gets there near $52, against a cheapest tracked $105
- Value for money matters more to you than this exact modelGigabyte B650M GAMING PLUS WF holds Relative Value 100 against its 56 for Workstation, 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 B for Gaming Build
- Strong-value threshold: ~$84$84 is where Relative Value reaches 80 for Small-Case Fit, in the 2026-11-08–2026-11-14 offer frame
Consider other options if
- Not the pick if Small-Case Fit is your main useit grades C there; ASRock A620AI WiFi grades S at $120
- Current price sits $21 above the strong-value threshold (~$84)cheapest tracked $105 against a $84 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 63 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-K
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
- Ethernet
- 1 Gb/s
Show all specifications
Features
- RAID
- Yes
Warranty
- Warranty
- 3 years
- Manufacturer part number
- PRIME B550M-K
Hover any value to see where it came from: a manufacturer specification, or a figure TheComparator.Tech calculated.
Sources: Comparator offer frame 2026-11-08–2026-11-14
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-K offers a balanced view across an all-round mix of priorities. It ranks #551 by capability in the current modelled field. Its clearest measured strength is feature score 41. MSI B550M PRO-VDH WIFI currently clears the same practical bar with stronger Relative Value.
ASUS PRIME B550M-K offers B-grade capability for Gaming Build. It ranks #507 by capability in the current modelled field. Its clearest measured strength is feature score 41. ASRock B550M-HVS SE90-MXBMK0-A0UAYZ currently clears the same practical bar with stronger Relative Value.
ASUS PRIME B550M-K offers D-grade capability for Workstation. It ranks #689 by capability in the current modelled field. Its clearest measured strength is feature score 41. The D grade is the decisive limitation for this workload.
ASUS PRIME B550M-K offers C-grade capability for Small-Case Fit. It ranks #234 by capability in the current modelled field. Its clearest measured strength is feature score 41. 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.
Useful links & sources
offer frame 2026-11-08–2026-11-14 · formula mobo-value-v6.1 · facts facts-2026-11-14 · 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.