A GeForce RTX 4090 does not require PCIe 5.0 to run at full link speed, so the motherboard decision often turns less on headline generation numbers and more on platform fit. That twist makes this category less straightforward than it first appears.
The best motherboards for 4090 and 13900k must suit both demanding hardware pieces without turning the rest of the build into an expensive desk ornament. The comparison ahead separates the choices by the details that matter most to the whole build.
Key Takeaways
- Match LGA1700 socket support to the Core i9-13900K, and confirm the board’s BIOS version supports the installed processor before assembly.
- Choose DDR4 or DDR5 based on the memory kit you already own, since the two standards are not interchangeable.
- Reserve a full-length PCIe x16 slot for the RTX 4090, then check slot spacing and case clearance for its large cooler.
- Favor strong VRM power delivery and substantial heatsinks, particularly for sustained 13900K workloads that can draw considerable power.
- Treat AM5 boards as a separate platform, because Ryzen-focused models cannot accept a 13900K even if the graphics slot is suitable.
| Practical Intel Foundation |  |
MSI B760M-A DDR4 Motherboard | LGA1700 CPU support | DDR4 memory compatibility | NVMe M.2 support | View on Amazon | Read Review |
| Budget Power Platform |  |
MSI B660-A DDR4 Motherboard | Four DDR4 slots | Broad LGA1700 support | NVMe M.2 storage | View on Amazon | Read Review |
| Familiar DDR4 Choice | MSI B660-A DDR4 Board | DDR4 platform | Four memory slots | LGA1700 compatibility | View on Amazon | Read Review | |
| AMD DDR5 Bundle |  |
MSI B850 Gaming Plus WiFi | Ryzen 7000 and 9000 support | DDR5 memory included | Wi-Fi 7 | View on Amazon | Read Review |
| Enthusiast Intel Hub |  |
ASUS ROG Maximus Z790 Hero | Z790 chipset | DDR5 memory support | Five M.2 slots | View on Amazon | Read Review |
| Ready-Made Performance Kit |  |
Intel Core i9-14900K Z790 Bundle | Core i9-14900K included | Z790 motherboard included | LGA1700 platform | View on Amazon | Read Review |
| White AM5 Workhorse |  |
ASUS ROG Strix B850-A WiFi | Four M.2 slots | PCIe 5.0 support | Wi-Fi 7 | View on Amazon | Read Review |
| Durable Graphics Power |  |
ASUS TUF RTX 4090 OC | 24GB GDDR6X memory | HDMI 2.1a | DisplayPort 1.4a | View on Amazon | Read Review |
| Triple-Fan 4K Performer |  |
MSI RTX 4090 Gaming X Trio | 24GB GDDR6X memory | 2595MHz clock | Triple-fan cooler | View on Amazon | Read Review |
| White High-End GPU |  |
ASUS ROG Strix RTX 4090 White OC | 24GB GDDR6X memory | White OC design | HDMI 2.1a | View on Amazon | Read Review |
More Details on Our Top Picks
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MSI B760M-A DDR4 Motherboard
For a Core i9-13900K and RTX 4090 build, this MSI B760M-A DDR4 board offers a sensible path to Intel’s LGA1700 platform without requiring DDR5 memory. Its listed support includes the 13900K, up to 256GB of DDR4, HDMI output, and NVMe M.2 storage.
The main limitation is the B760 chipset, which is less suited to serious CPU overclocking than a Z790 board. It is best for a powerful but controlled workstation or gaming PC, especially if existing DDR4 memory is part of the plan.
- Brand:MSI
- Product Type:Micro-ATX motherboard
- Platform:Intel LGA1700
- Memory:DDR4, up to 5333MHz
- Expansion:NVMe M.2
- Connectivity:HDMI
- Additional Feature:Supports Intel 14th Gen CPUs
- Additional Feature:Supports up to 256GB RAM
- Additional Feature:Compatible with Core i9-13900K
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MSI B660-A DDR4 Motherboard
This B660-A listing targets builders who want Intel LGA1700 compatibility and four DDR4 memory slots while keeping the platform straightforward. The title lists support for the Core i9-13900K, 14th-generation processors, HDMI, and NVMe M.2 storage.
For an RTX 4090 system, the board can form a capable foundation, but the B660 chipset is not the natural choice for CPU multiplier overclocking. BIOS support for newer processors should also be confirmed before installation, particularly if the board ships with older firmware.
- Brand:MSI
- Product Type:ATX motherboard
- Platform:Intel LGA1700
- Memory:DDR4, up to 5333MHz
- Expansion:NVMe M.2
- Connectivity:HDMI
- Additional Feature:Supports Core i9-13900K
- Additional Feature:Supports Intel 14th Gen CPUs
- Additional Feature:Four DDR4 memory slots
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MSI B660-A DDR4 Board
This appears to be the same MSI B660-A DDR4 model as Product 2, so its appeal is similar: a familiar Intel platform, four DDR4 slots, and support listed for the Core i9-13900K. HDMI and NVMe M.2 support also suit a conventional gaming or productivity build.
The duplicate listing is the key caution here, not a hardware flaw. You should verify the exact seller, included accessories, and BIOS version, while remembering that B660 does not target CPU overclocking like a Z790 motherboard does.
- Brand:MSI
- Product Type:ATX motherboard
- Platform:Intel LGA1700
- Memory:DDR4, up to 5333MHz
- Expansion:NVMe M.2
- Connectivity:HDMI
- Additional Feature:Supports Core i9-13900K
- Additional Feature:Supports Intel 14th Gen CPUs
- Additional Feature:HDMI video output
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MSI B850 Gaming Plus WiFi
This is not an Intel motherboard, but it is a strong AMD AM5 alternative for a new system. The bundle pairs the MSI B850 Gaming Plus WiFi with 32GB of DDR5, while the board supports Ryzen 7000 and 9000 processors, PCIe 5.0, Wi-Fi 7, and 5G LAN.
That makes it unsuitable for a Core i9-13900K, and the included memory cannot be reused as DDR4. For a fresh Ryzen build with an RTX 4090, though, its high-speed connectivity and next-generation expansion options make a persuasive package.
- Brand:MSI
- Product Type:ATX motherboard
- Platform:AMD AM5
- Memory:DDR5, 32GB included
- Expansion:PCIe 5.0 x16
- Connectivity:Wi-Fi 7, 5G LAN
- Additional Feature:M.2 Gen5 support
- Additional Feature:PCIe 4.0 x16 slot
- Additional Feature:32GB RAM bundle
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ASUS ROG Maximus Z790 Hero
For a 13900K and RTX 4090 pairing, the ROG Maximus Z790 Hero is the most clearly enthusiast-focused Intel board in this group. Its listed features include DDR5 support, 20+1 power stages, PCIe 5.0, five M.2 slots, 2.5Gb LAN, and dual Thunderbolt 4 ports.
The tradeoff is complexity and likely overkill for a basic gaming machine. Its DDR5-only platform also means existing DDR4 kits are not compatible, but that is a reasonable compromise for a high-end build built around expansion and connectivity.
- Brand:ASUS
- Product Type:ATX motherboard
- Platform:Intel LGA1700
- Memory:DDR5
- Expansion:PCIe 5.0, five M.2
- Connectivity:2.5Gb LAN, Wi-Fi 6E
- Additional Feature:20+1 power stages
- Additional Feature:Bluetooth 5.2
- Additional Feature:USB4 support
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Intel Core i9-14900K Z790 Bundle
This listing combines an Intel Core i9-14900K with an ASUS TUF Gaming Z790-Plus WiFi motherboard, giving you a coordinated platform for a high-end RTX 4090 build. The bundle format can simplify component selection, and the Z790 chipset is a natural match for Intel’s unlocked K-series processor.
The processor is a 14th-generation model rather than the requested 13900K, so this is an alternative, not a direct match. Confirm the motherboard’s memory type and the bundle contents before buying, since the title does not specify every board-level feature.
- Brand:Intel, ASUS
- Product Type:CPU and motherboard bundle
- Platform:Intel LGA1700
- Memory:Not specified
- Expansion:Z790 platform
- Connectivity:Wi-Fi
- Additional Feature:24-core processor
- Additional Feature:TUF Gaming motherboard
- Additional Feature:Supports RTX 4090-class builds
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ASUS ROG Strix B850-A WiFi
The ROG Strix B850-A Gaming WiFi is another AMD AM5 option, designed for Ryzen processors rather than the Core i9-13900K. Its 14+2+2 power-stage design, DDR5 support, PCIe 5.0, four M.2 slots, and Wi-Fi 7 give a new RTX 4090 system plenty of modern platform support.
Because it uses B850 and AM5, it cannot accept an Intel LGA1700 processor. Choose it for a new Ryzen build, particularly if the white-and-silver styling, 2.5G LAN, and USB 20Gbps Type-C connection fit the rest of the system.
- Brand:ASUS
- Product Type:ATX motherboard
- Platform:AMD AM5
- Memory:DDR5
- Expansion:PCIe 5.0, four M.2
- Connectivity:Wi-Fi 7, 2.5G LAN
- Additional Feature:14+2+2 power stages
- Additional Feature:USB 20Gbps Type-C
- Additional Feature:Q-Antenna included
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ASUS TUF RTX 4090 OC
This is a graphics card, not a motherboard, but it is directly relevant to the roundup’s RTX 4090 focus. The ASUS TUF Gaming model includes 24GB of GDDR6X memory, PCIe 4.0 connectivity, HDMI 2.1a, and DisplayPort 1.4a for demanding high-resolution gaming.
You will still need a compatible LGA1700 motherboard for the Core i9-13900K, along with a case, power supply, and adequate cooling. Its dual ball-bearing axial fans are listed as a durability-oriented feature, while the substantial card size should be checked against available case clearance.
- Brand:ASUS
- Product Type:Graphics card
- Platform:PCIe 4.0
- Memory:24GB GDDR6X
- Expansion:PCIe x16
- Connectivity:HDMI 2.1a, DisplayPort 1.4a
- Additional Feature:RTX 4090 GPU
- Additional Feature:OC Edition design
- Additional Feature:Dual ball-bearing fans
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MSI RTX 4090 Gaming X Trio
The MSI Gaming X Trio is also a graphics card rather than a motherboard, yet it fits the RTX 4090 side of this buying guide. Its listed specifications include 24GB of GDDR6X, a 2595MHz clock, PCIe Gen 4, a 384-bit memory interface, and three DisplayPort outputs.
For a 13900K system, pair it with a suitable Intel motherboard and a power supply designed for a high-end GPU. The title gives useful display information, including HDMI 2.1a and support for 4K and 8K HDR, but it does not provide motherboard compatibility details because this is not a motherboard.
- Brand:MSI
- Product Type:Graphics card
- Platform:PCIe Gen 4
- Memory:24GB GDDR6X
- Expansion:384-bit interface
- Connectivity:HDMI 2.1a, three DisplayPort
- Additional Feature:RTX 4090 GPU
- Additional Feature:Gaming X Trio cooler
- Additional Feature:Three DisplayPort outputs
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ASUS ROG Strix RTX 4090 White OC
The ASUS ROG Strix White OC is a white RTX 4090 graphics card, not a motherboard, and it is included here as a matching GPU option for a 13900K build. It provides 24GB of GDDR6X memory, PCIe 4.0, HDMI 2.1a, DisplayPort 1.4a, and a listed three-year warranty.
You will need to select the Intel motherboard separately, preferably one with enough physical clearance and a suitable PCIe x16 slot. The white finish suits coordinated builds, but the title does not specify card dimensions, so case clearance remains a detail to confirm.
- Brand:ASUS
- Product Type:Graphics card
- Platform:PCIe 4.0
- Memory:24GB GDDR6X
- Expansion:PCIe x16
- Connectivity:HDMI 2.1a, DisplayPort 1.4a
- Additional Feature:RTX 4090 GPU
- Additional Feature:ROG Strix cooler
- Additional Feature:DisplayPort 1.4a support
Frequently Asked Questions
Do I need a Z790 motherboard for the RTX 4090 and Core i9-13900K?
No. A compatible Z690 motherboard can support the 13900K, provided it has the correct BIOS and sufficient power delivery. A Z790 board is often easier to select because it is designed for 13th-generation processors and typically includes newer connectivity. The RTX 4090 works with many suitable PCIe motherboards, since it does not require PCIe 5.0. Focus on the board’s CPU support, VRM cooling, slot spacing, and case compatibility.
Is DDR5 better than DDR4 for this build?
DDR5 is the preferred choice for a new high-end system because it offers higher bandwidth and leaves you with a more current memory platform. The difference varies by game and workload, but DDR5 pairs naturally with a premium 13900K build. DDR4 can reduce the initial cost if you already own a suitable kit, but DDR4 and DDR5 are not interchangeable. Buy the motherboard version that matches your memory, since the slots use different electrical layouts.
Can any motherboard handle the power requirements of a 13900K?
Not comfortably. Choose a board with a well-cooled VRM, solid CPU power connectors, and a BIOS with sensible power controls. Entry-level boards may run the chip, but sustained rendering and heavy multitasking can expose limits in heat management and power delivery. You also need a suitable CPU cooler and power supply. A 13900K and RTX 4090 combination commonly calls for a quality 1,000W PSU, although the exact requirement depends on the specific graphics card, cooler, drives, and power limits.
Will an RTX 4090 fit on every ATX motherboard?
The graphics card connects to the primary PCIe x16 slot, but physical fit depends on the card’s thickness and the location of nearby slots. Many RTX 4090 models occupy three or more slots, so they can cover secondary PCIe sockets and restrict access to headers. Check both the motherboard layout and the case specifications. Confirm the case supports the card’s length, thickness, and power-cable clearance, since the motherboard alone does not determine whether the complete system will fit.
Should I buy a motherboard with PCIe 5.0?
PCIe 5.0 is not necessary for the RTX 4090, which uses PCIe 4.0. It can still be worthwhile if you want a PCIe 5.0 M.2 slot or additional upgrade capacity over the life of the system. Read the lane-sharing details before buying. On some boards, installing a PCIe 5.0 SSD can reduce the primary graphics slot to fewer lanes, so check the manual and choose a layout that keeps the GPU at x16 bandwidth.
