ASUS PRIME B860M-K
The current ASUS PRIME B860M-K price from retailers, its key specifications, and how it performs for each job.
ASUS · MOBO · LGA1851
Retailer photo of ASUS PRIME B860M-K (Micro ATX). View this offer in Where to buy
Trade-offs: you want strong value with Balanced priorities specifically
- Socket
- LGA 1851
- Chipset
- Intel B860
- Form factor
- Micro ATX
- Memory
- DDR5 · 2 slots
- M.2 slots
- 4
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 $156 the ASUS PRIME B860M-K is priced 10% below its $173 representative market level. Only 2 verified new offers stand behind it, so the level can move quickly.
Consider: Gigabyte B650M GAMING PLUS WF offers stronger value around $100.Compare
Prices & availability
ASUS PRIME B860M-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 B860M-K (Micro ATX) | Newegg | New | $156 | 32 | 2026-10-29 | View offer → |
| ASUS PRIME B860M-K (Micro ATX) | MemoryC | New | $190 | 28 | 2026-10-29 | View offer → |
| ASUS PRIME B860M-KMultiple 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.
#667 of 972 graded motherboards
- #664 ASUSASUS PRIME B860M-A 49
- #665 ASUSASUS PRIME B860M-A WIFI 49
- #666 ASUSASUS PRIME B860M-A WIFI-CSM 49
- #667 ASUSASUS PRIME B860M-K 49
- #668 ASUSASUS Pro B860M-CT-CSM 49
- #669 ASUSASUS ROG STRIX B860-A GAMING WIFI 49
- #670 ASUSASUS ROG STRIX B860-F GAMING WIFI 49
Value Balanced
How much of that you get for today’s price.
#456 of 1020 currently priced motherboards
- #453 GigabyteGigabyte B760M GAMING X AX DDR4 32
- #454 ASUSASUS TUF GAMING A520M-PLUS WIFI 32
- #455 ASUSASUS PRIME B860-PLUS-CSM 32
- #456 ASUSASUS PRIME B860M-K 32
- #457 ASUSASUS TUF B360M-PLUS GAMING S 32
- #458 ASUSASUS TUF X470-Plus Gaming 32
- #459 MSIMSI MAG X570S TOMAHAWK MAX WIFI 32
Performance Gaming Build
How much it can do. Price plays no part in this ranking.
#452 of 955 graded motherboards
- #449 ASRockASRock B860M-X 78
- #450 ASUSASUS B860M-E 78
- #451 ASUSASUS PRIME B860-PLUS-CSM 78
- #452 ASUSASUS PRIME B860M-K 78
- #453 ASUSASUS ROG STRIX B860-A GAMING WIFI 78
- #454 ASUSASUS ROG STRIX B860-F GAMING WIFI 78
- #455 ASUSASUS ROG STRIX B860-G GAMING WIFI 78
Value Gaming Build
How much of that you get for today’s price.
#592 of 1020 currently priced motherboards
- #589 ASUSASUS PRIME B760-PLUS 22
- #590 ASUSASUS ROG STRIX B860-A GAMING WIFI 22
- #591 GigabyteGigabyte Z490 UD AC 22
- #592 ASUSASUS PRIME B860M-K 22
- #593 ASUSASUS Pro WS X570-ACE 22
- #594 MSIMSI Z370 GAMING PRO CARBON AC 22
- #595 ASUSASUS ROG STRIX X670E-I GAMING WIFI 22
Performance Workstation
How much it can do. Price plays no part in this ranking.
#759 of 944 graded motherboards
- #756 GigabyteGigabyte B560M DS3H 35
- #757 ASUSASUS B860M AYW GAMING WIFI 35
- #758 ASUSASUS B860M-BRO 35
- #759 ASUSASUS PRIME B860M-K 35
- #760 GigabyteGigabyte B860M D 35
- #761 GigabyteGigabyte B860M H 35
- #762 ASRockASRock H170 Pro4S 35
Value Workstation
How much of that you get for today’s price.
#626 of 1020 currently priced motherboards
- #623 MSIMSI Z270 SLI 11
- #624 ASUSASUS TUF GAMING B660M-E D4 11
- #625 GigabyteGigabyte Z390 M GAMING 11
- #626 ASUSASUS PRIME B860M-K 11
- #627 GigabyteGigabyte B550 GAMING X 11
- #628 MSIMSI PRO B840M-B 11
- #629 MSIMSI MAG B660M BAZOOKA DDR4 11
Performance Small-Case Fit
How much it can do. Price plays no part in this ranking.
#136 of 972 graded motherboards
- #133 ASRockASRock B860M Steel Legend WiFi 73
- #134 ASRockASRock B860M-X 73
- #135 ASUSASUS B860M-E 73
- #136 ASUSASUS PRIME B860M-K 73
- #137 ASUSASUS ROG STRIX B860-G GAMING WIFI 73
- #138 ASUSASUS TUF GAMING B860M-PLUS 73
- #139 ASUSASUS TUF GAMING B860M-PLUS WIFI 73
Value Small-Case Fit
How much of that you get for today’s price.
#157 of 1020 currently priced motherboards
- #154 ASUSASUS ROG STRIX B650E-F GAMING WIFI 38
- #155 ASUSASUS PRIME B760M-A D4 37
- #156 ASUSASUS ROG STRIX X670E-I GAMING WIFI 37
- #157 ASUSASUS PRIME B860M-K 37
- #158 ASUSASUS ROG STRIX Z590-I GAMING WIFI 37
- #159 MSIMSI MAG-Z890-TOMAHAWK-WIFI-II 36
- #160 ASUSASUS Pro B860M-CT-CSM 36
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 Value32 | Higher capability Higher capability · Higher Value with current priorities Gigabyte X870 GAMING WIFI6 100 +83% capability · +2% price | |
| Gaming BuildScenario capability | GradeB Value22 | Higher capability ASUS B650E MAX GAMING WIFI S 72 +19% capability · +15% price | Higher Value with current priorities Gigabyte X870 GAMING WIFI6 A 100 +17% capability · +2% price |
| WorkstationScenario capability | GradeD Value11 | Higher capability MSI Z890 GAMING PLUS WIFI A 82 +156% capability · +15% price | Higher Value with current priorities Gigabyte X870 GAMING WIFI6 B 87 +141% capability · +2% price |
| Small-Case FitScenario capability | GradeC Value37 | Higher capability ASUS ROG STRIX Z490-I GAMING S 45 +35% capability · +15% price | Higher Value with current priorities ASUS b650em-max-gaming-wifi C 100 -3% capability · -23% price |
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 $42, against a cheapest tracked $156
- 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
- Not the pick if Workstation is your main useit grades only D there
- You are buying for Gaming Build and want no asterisksthe rubric caps this grade: entry chipset — no cpu overclocking headroom
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; MSI Z890 GAMING PLUS WIFI grades A at $180
- 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; ASUS ROG STRIX Z490-I GAMING grades S at $179
- 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 modelASUS b650em-max-gaming-wifi holds Relative Value 100 against its 37 for Small-Case Fit, at $120
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 B860M-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
- Socket
- LGA 1851
- Chipset
- Intel B860
- Form factor
- Micro ATX
Physical / Outputs
- M.2 slots
- 4
- SATA ports
- 4
- PCIe ×16 slots
- 1
- USB ports
- 4
- Ethernet
- 2.5 Gb/s
Show all specifications
Features
- RAID
- Yes
Warranty
- Warranty
- 3 years
- Manufacturer part number
- PRIME B860M-K
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-10-23–2026-10-29
What to check in your build
LGA 1851
Takes LGA 1851 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
DDR5 · 2 slots · up to 128 GB
Takes DDR5 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 B860M-K offers a balanced view across an all-round mix of priorities. It ranks #667 by capability in the current modelled field. Its clearest measured strength is feature score 61. Gigabyte B650M GAMING PLUS WF currently clears the same practical bar with stronger Relative Value.
ASUS PRIME B860M-K offers B-grade capability for Gaming Build. It ranks #452 by capability in the current modelled field. Its clearest measured strength is feature score 61. Gigabyte B650M GAMING PLUS WF currently clears the same practical bar with stronger Relative Value.
ASUS PRIME B860M-K offers D-grade capability for Workstation. It ranks #759 by capability in the current modelled field. Its clearest measured strength is feature score 61. The D grade is the decisive limitation for this workload.
ASUS PRIME B860M-K offers C-grade capability for Small-Case Fit. It ranks #136 by capability in the current modelled field. Its clearest measured strength is feature score 61. 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 2026-10-23–2026-10-29 · 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.