Core Ultra 5 245K Motherboards: Best Picks by Tier (2026)

You bought a Core Ultra 5 245K, or you are about to, and now two chipsets are staring back at you from motherboard spec sheets that look nearly identical. B860 and Z890 both socket the chip. Both run DDR5 well past its rated speed. Both give the graphics card a PCIe 5.0 x16 slot.

One difference matters more than everything else on those sheets. B860 fixes the CPU multiplier. Z890 leaves it open. That single line decides whether the K in 245K was money well spent, and it is the spine of every pick below.

Our top pick: MSI MAG Z890 Tomahawk WiFi II

The MSI MAG Z890 Tomahawk WiFi II is the cheapest board that hands a 245K everything the chip can do, and it carries power delivery sized for a processor two tiers above it.

MAG Z890 Tomahawk WiFi II Motherboard, ATX - Supports Intel Core Ultra Processors (Series 2), LGA 1851 - DDR5 Memory Boost 4 x DDR5 (9200+ MT/s OC), 1 x PCIe 5.0 x16, 1 x M.2 Gen5, 5G LAN, Wi-Fi 7

$254.17

Buy the MSI MAG Z890 Tomahawk WiFi II on Amazon

Quick picks

Specs at a glance

How we picked the best motherboard for the Core Ultra 5 245K

Start with the ratio, because it is the only genuinely binary thing on this platform. The K in 245K buys an open CPU multiplier, and B860 does not pass that through. Memory overclocking survives on B860, XMP profiles work, the chip runs at full stock boost. The ratio is simply fixed. So the first question is not which board has more M.2 slots. It is whether this buyer will ever open the BIOS and raise a multiplier. If the answer is no, B860 saves real money and costs no performance. If the answer is yes, every B860 board on the market is the wrong board.

Then size the power delivery to the chip rather than to the box art. The 245K is a 14-core part, six performance cores and eight efficient ones, and it does not draw what a 285K draws. Every board here carries at least twelve Vcore phases with real heatsink coverage, which is more than this chip asks for. Phase counts past roughly fourteen with good cooling are a spec-sheet contest, not a performance one. What does matter is that socket compatibility is not build readiness. A board can accept a chip and still throttle it.

Memory frequency is where the board changes what an Arrow Lake chip does. AMD's X3D parts lean on cache and shrug at RAM speed. Arrow Lake does not, and it gains measurably as DDR5 climbs. Two things set the ceiling: the firmware, where premium boards ship tuning tools built for CUDIMM kits, and the DIMM topology, where two slots hold a clean signal at frequencies four slots cannot. If a fast DDR5 kit for the 245K is in the plan, that pairing deserves as much thought as the chipset.

Last, the spending line. A premium board earns its premium when the build genuinely needs several Gen5 M.2 slots, PCIe lane bifurcation, Thunderbolt on the board, 10 GbE, or serious memory tuning. On a 245K that list collapses to memory tuning and nothing else. A single Gen5 M.2 slot is worth having when it arrives free and worth nothing extra when it does not, because Gen5 drives still want their own cooling and the gap over a fast Gen4 drive does not show up in games. Everything past that is branding and heatsink mass, and the money moves better into the graphics card. That principle is the backbone of how we choose a motherboard on any platform.

Best Overall: MSI MAG Z890 Tomahawk WiFi II

MAG Z890 Tomahawk WiFi II Motherboard, ATX - Supports Intel Core Ultra Processors (Series 2), LGA 1851 - DDR5 Memory Boost 4 x DDR5 (9200+ MT/s OC), 1 x PCIe 5.0 x16, 1 x M.2 Gen5, 5G LAN, Wi-Fi 7

$254.17

Buy the MSI MAG Z890 Tomahawk WiFi II on Amazon

Specs

What it does well

Sixteen 90 A smart power stages under a 14-core chip is not a close contest. Reviewer thermal testing put this board's VRM in the low 40s Celsius after a ten minute stress run with Intel's flagship Core Ultra 9 on top, and the 245K is a considerably lighter load than that. Nothing in this power delivery is going to be the reason a 245K stops boosting.

The rest of it is the Tomahawk formula. Four DDR5 slots rated past 9000 MT/s on the overclocking profile, a PCIe 5.0 x16 slot for the graphics card, four M.2 sockets with the top one running Gen5 and the other three on Gen4, 5 GbE wired networking, Wi-Fi 7, and Thunderbolt 4 on the rear.

And the multiplier is open, which is the whole point. Pairing a K-suffix chip with a board that lets the ratio move is the difference between paying for a feature and paying for a badge.

What you give up

The WiFi II is a cost-reduced revision of the original Z890 Tomahawk rather than a straight successor, and reviewers have flagged that it drops some of the older board's rear I/O to hit a lower price. Cross-check the port list against the first-generation board before assuming the two match feature for feature.

Then there is the four-slot memory topology, which caps practical DDR5 tuning below what a two-DIMM board reaches. And a fair amount of this VRM is headroom a 245K will never touch. That is comfort, not performance.

Who it's for

The buyer who chose a K chip deliberately, wants the ratio available, and would rather the motherboard never became the limiting part in the build. This is the default answer for a 245K on ATX.

Best Value: MSI MAG B860 Tomahawk WiFi

MSI MAG B860 Tomahawk WiFi Motherboard, ATX - Supports Intel Core Ultra Processors (Series 2), LGA 1851 - DDR5 Memory Boost 9200+ MT/s OC, 1 x PCIe 5.0 x16, 1 x M.2 Gen5, 5G LAN, Wi-Fi 7

$169.00$229.99

Buy the MSI MAG B860 Tomahawk WiFi on Amazon

Specs

What it does well

This is the same board family with the chipset tax taken out. Everything a 245K owner touches daily survives: a PCIe 5.0 x16 slot for the graphics card, a Gen5 M.2 socket, 5 GbE, Wi-Fi 7, and four DDR5 slots that overclock as freely as the Z890 version does. B860 keeps memory overclocking intact, so a fast kit still runs at its rated speed instead of dropping back to the chip's native 5600 MT/s.

Power delivery is twelve Vcore phases on 60 A stages. Tom's Hardware ran flagship-class Arrow Lake silicon through this board without the VRM complaining, and the 245K sits well under that bar. If the wider chipset field is worth a look, our B860 roundup for the Core Ultra 200 series covers the rest of it.

What you give up

The CPU multiplier, and that is the entire trade. If the reason for choosing a 245K over the locked 245 was the ratio, this board removes that reason and turns the K premium into money spent on nothing.

The 60 A stages are a real step down from the Z890 Tomahawk's 90 A parts too. Comfortable under a 14-core chip, less comfortable if the build ever grows into a 285K, which is worth a thought on a socket with a short upgrade runway.

Who it's for

The buyer who wants Arrow Lake's platform features, has no plan to ever move the CPU ratio, and would rather put the saved money into a better graphics card. Most 245K builds are honestly this buyer.

Best Premium: ASUS ROG Strix Z890-A Gaming WiFi

ASUS ROG STRIX Z890-A GAMING WIFI Z890 LGA 1851 ATX motherboard, Intel® Core™ Ultra Series 2 Ready, Advanced AI PC-ready, 16+2+1+2 stages, DDR5, WiFi 7, 2.5G, 5x M.2, Thunderbolt™ 4, USB Type-C, AI OC

$285.29

Buy the ASUS ROG Strix Z890-A Gaming WiFi on Amazon

Specs

What it does well

Five M.2 sockets, Thunderbolt 4 on the rear and a 16+2+1+2 stage arrangement give this board more room than the mainstream tier. The real separator is firmware. AEMP III and DIMM Fit Pro expose roughly twenty memory tuning parameters, let you define your own test ranges, and let you weight the tuner toward stability or toward frequency.

That matters because Arrow Lake responds to memory frequency in a way AMD's cache-heavy parts do not. Boards with the signal routing and firmware for CUDIMM kits push enthusiast memory past 9000 MT/s, and this one is built for that job. Our Z890 board guide covers how the rest of the chipset's range compares.

What you give up

2.5 GbE networking, where both Tomahawks ship 5 GbE. Paying more for less wired throughput is a strange line item, and it is the clearest signal that this board's premium is aimed at tuners rather than at general builders.

The bigger counterpoint is simpler. A 245K buyer who is not chasing memory frequency is paying for tuning firmware they will open once and never return to. Reports also suggest the headline CUDIMM speeds quoted for this platform come from two-slot boards built specifically for memory records, and that four DIMM slots add enough signal noise to cap real results below those numbers.

Who it's for

The buyer who reads memory timing threads for entertainment, plans to run a CUDIMM kit, and wants Thunderbolt on the board rather than on a card. If none of that describes you, the top pick does the same job for less.

Best Budget: MSI PRO B860M-A WiFi

MSI PRO B860M-A WiFi Motherboard, mATX - Supports Intel Core Ultra Processors (Series 2), LGA 1851-12 DRPS, DDR5 Memory Boost (8600+ MT/s OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

$179.99

Buy the MSI PRO B860M-A WiFi on Amazon

Specs

What it does well

Twelve DRPS stages, a Gen5 M.2 socket, 5 GbE and Wi-Fi 7 on a micro-ATX board is a lot of platform for the tier. Memory overclocking is open here as it is on every B860 board, so a 245K on this board still runs a fast DDR5 kit at its rated speed.

The PRO line trades gaming-board styling for a lower price, and on a build where the money belongs in the graphics card, that is the correct trade. Nothing on this board is decorative.

What you give up

The multiplier is fixed, the same as every B860 board. Past that, the PRO line skips the heatsink mass and rear I/O of the gaming boards, and micro-ATX means fewer M.2 sockets and fewer expansion slots to work with.

This is a board sized exactly to a 245K and not a step further, which is the point of the tier but does leave the platform nowhere to grow if a bigger chip ever goes in. Buyers have flagged that boards a tier below this one start thinning out their VRM heatsink coverage, and this is roughly where that line sits.

Who it's for

The buyer putting a 245K into a gaming box on a real budget, who has accepted that the ratio is off the table and wants every remaining dollar in the graphics card.

Editor's Pick: ASRock B860I Lightning WiFi 6E

ASRock Phantom Gaming B860I Lightning WiFi 6E Intel Core Ultra B860 LGA1851 DDR5 9333 MHz 128GB M.2 Mini ITX Motherboard Thunderbolt SATA3 6.0 Gb/s PCIe 5.0

$169.99

Buy the ASRock B860I Lightning WiFi 6E on Amazon

Specs

What it does well

Ten Vcore phases on 110 A stages, packed onto a 17 by 17 centimetre board, is more power delivery than most full-size B860 boards carry. Small form factor usually means a compromised VRM. Not here.

Two DIMM slots is also the topology that holds high memory frequency, and this board is rated past 9300 MT/s with Gear 2 holding into the 8000s. Thunderbolt 4 on the rear covers external storage and docks, which matters in a case with no room for expansion cards.

What you give up

Wi-Fi 6E instead of Wi-Fi 7, 2.5 GbE instead of 5 GbE, two M.2 sockets instead of four, and two DIMM slots instead of four. For a wired builder the networking step down costs nothing either way, but the storage and memory capacity ceilings are real.

Review testing put it mid-pack on sustained CPU work, stronger in games than in encode. The multiplier is fixed, because it is a B860 board, and in a small case that is less of a loss than it sounds: the cooler in an ITX build usually cannot carry the extra heat a raised ratio produces. One note on the listing itself, which describes the board as ATX. It is Mini-ITX.

Who it's for

The buyer putting a 245K into a small case, where the fixed ratio costs nothing they could have used anyway and the power delivery is better than the form factor suggests.

Bottom line

If you want the ratio open and one board to stop thinking about, buy the MSI MAG Z890 Tomahawk WiFi II. If you will never touch the multiplier, the MSI MAG B860 Tomahawk WiFi is the same experience for less. If memory tuning is the hobby, the ASUS ROG Strix Z890-A Gaming WiFi has the firmware for it. On a tight budget, the MSI PRO B860M-A WiFi is the floor worth standing on. For a small case, the ASRock B860I Lightning WiFi 6E. And if the platform itself is still an open question, our 245K against the Ryzen 5 9600X comparison is where to settle it.

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