Intel Core i9-13900K on the ASUS Prime Z790M-Plus
The Intel Core i9-13900K loses a little speed under sustained load on the ASUS Prime Z790M-Plus: the board's 10 Vcore stages carry about 372 W and the processor asks for 250 W in a sustained all-core load, which is 67 % of capacity and an estimated 82 °C at the VRM.
By Farrukh Sufyan Sarwar · Published 1 November 2026 · Model v1.0 · Build 2026-11-04
- Estimated VRM temperature
- 82 °C
- 38 °C case air plus 44 °C of rise
- Stress ratio
- 0.67
- 250 W of 372 W capacity
- Capacity score
- 60/100
- 100 minus the stress ratio times 60
- Expected clock loss
- 1 %
- Sustained all-core clocks, not gaming frame rate
- Board capacity
- 372 W
- 10 × 50 A, teamed
- Processor draw
- 250 W
- 253 W at peak boost
What happens when you build this
Expect a small, measurable loss. Running 250 W through 372 W of capacity leaves the ASUS Prime Z790M-Plus at 67 % load, which our model turns into 82 °C at the VRM and about 1 % off sustained clocks for the Intel Core i9-13900K. It is a usable build, but the board is the part holding it back.
The ASUS Prime Z790M-Plus carries 10 Vcore power stages rated 50 A each, teamed in pairs off a shared controller channel, with a thin heatsink that helps at idle more than under load. That works out to about 372 W of sustained core power once the design and the cooling are accounted for, which is the number the Intel Core i9-13900K's 250 W is measured against.
You can build this. If the machine mostly games, the 1 % our model expects will not show up in a frame-rate graph, because games rarely hold all cores at full power long enough to matter. If it renders, compiles or encodes for more than a few minutes at a time, the next board up recovers that 1 % for less than the price of the Intel Core i9-13900K's next model up.
The measurement
The gauge shows the estimated VRM temperature under a sustained all-core load, with a thinner copper needle for the brief peak the processor reaches at full boost. The schematic beside it shows the same thing as current per power stage.
Estimated VRM temperature
Intel Core i9-13900K on ASUS Prime Z790M-Plus: estimated 82 °C sustained, 82 °C at peak boost. Risk band: MODERATE.
- Sustained
- Sustained 82 °C
- Peak boost
- Peak boost 82 °C
Power delivery
Where the PCIe lanes go
The ASUS Prime Z790M-Plus keeps its 3 M.2 slots clear of the graphics lanes, so the primary slot stays at x16 whatever you install. That is one fewer configuration trap than boards that route a second M.2 slot from the processor.
The ASUS Prime Z790M-Plus takes DDR5, which the Intel Core i9-13900K supports, and validates memory up to DDR5-7200. Firmware is not an issue: the ASUS Prime Z790M-Plus ships with a BIOS that already knows Raptor Lake.
Boards that run the Intel Core i9-13900K without throttling
Each of these keeps the processor under a third of the board's sustained power capacity, and each has a listing we can verify.
BudgetB760MSIMSI MAG B760 Tomahawk WiFi
The cheapest board here that still leaves the Intel Core i9-13900K real headroom.
Capacity used26 % · 55 °CIntel Core i9-13900K draws 250 W of 956 W
- Socket
- LGA1700
- Vcore
- 12 × 75 A
- Memory
- DDR5
$142.65
as of 4 November 2026
EnthusiastZ790ASUSASUS ROG Strix Z790-E Gaming WiFi II
The most headroom of any board in the database for the Intel Core i9-13900K.
Capacity used12 % · 46 °CIntel Core i9-13900K draws 250 W of 2104 W
- Socket
- LGA1700
- Vcore
- 18 × 110 A
- Memory
- DDR5
$499.99
as of 4 November 2026
The ASUS Prime Z790M-Plus
ASUS Prime Z790M-Plus
- Socket
- LGA1700
- Vcore
- 10 × 50 A
- Memory
- DDR5
~$189
no live listing yet
- Chipset
- Z790
- Form factor
- Micro-ATX
- Vcore stages
- 10 × 50 A
- Phase design
- Teamed phases
- VRM cooling
- Light heatsink
- VRM tier
- Tier B
- Memory
- DDR5-7200
- BIOS Flashback
- No
Questions people ask about this pairing
- Will the Intel Core i9-13900K throttle on the ASUS Prime Z790M-Plus?
Yes, by about 1 % of sustained all-core clock speed. The Intel Core i9-13900K asks for 250 W and the ASUS Prime Z790M-Plus carries roughly 372 W, which puts its power stages at an estimated 82 °C.
- How many power phases does the ASUS Prime Z790M-Plus have?
10 Vcore power stages rated 50 A each, in a teamed design. Counting only the core rail matters here — vendor marketing often adds the SoC and auxiliary phases to reach a bigger number, and those carry none of the CPU's core load.
- Does the ASUS Prime Z790M-Plus need a BIOS update for the Intel Core i9-13900K?
No. The ASUS Prime Z790M-Plus ships with a BIOS that already supports Raptor Lake, so the Intel Core i9-13900K posts out of the box.
- What memory does the Intel Core i9-13900K take on the ASUS Prime Z790M-Plus?
DDR5, in up to 4 slots, validated to DDR5-7200 on this board.
- What VRM temperature should I expect with the Intel Core i9-13900K on this board?
Our model estimates 82 °C, from 38 °C of interior case air plus the stress ratio of 0.67 scaled by 65 °C. Measured numbers move with case airflow and ambient temperature, so treat this as a band rather than a reading.