AMD Ryzen 7 8700G on the MSI MAG X670E Tomahawk WiFi
Pairing the AMD Ryzen 7 8700G with the MSI MAG X670E Tomahawk WiFi puts 88 W through a 1260 W power stage array — 7 % of what the board holds — for an estimated VRM temperature of 43 °C and no measurable clock loss.
By Farrukh Sufyan Sarwar · Published 1 November 2026 · Last verified 4 November 2026 · Model v1.0 · Build 2026-11-04
- Estimated VRM temperature
- 43 °C
- 38 °C case air plus 5 °C of rise
- Stress ratio
- 0.07
- 88 W of 1260 W capacity
- Capacity score
- 96/100
- 100 minus the stress ratio times 60
- Expected clock loss
- 0 %
- Sustained all-core clocks, not gaming frame rate
- Board capacity
- 1260 W
- 14 × 80 A, doubled
- Processor draw
- 88 W
- 88 W at peak boost
What happens when you build this
This pairing is not close to any limit. 88 W against 1260 W of capacity leaves the MSI MAG X670E Tomahawk WiFi running its stages at 7 % load, and our model puts the VRM at 43 °C in a closed case. Nothing about the AMD Ryzen 7 8700G pushes this board into the region where clocks start dropping.
The MSI MAG X670E Tomahawk WiFi carries 14 Vcore power stages rated 80 A each, driven in doubled pairs, which costs a little transient response, with large finned blocks with real thermal mass. That works out to about 1260 W of sustained core power once the design and the cooling are accounted for, which is the number the AMD Ryzen 7 8700G's 88 W is measured against.
Buy it on the rest of the specification rather than on power delivery, because at 7 % of capacity the VRM has stopped being the interesting variable. Count the M.2 slots you need, check the rear ports against what you actually plug in, and let the MSI MAG X670E Tomahawk WiFi's 14 stages get on with it.
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
AMD Ryzen 7 8700G on MSI MAG X670E Tomahawk WiFi: estimated 43 °C sustained, 43 °C at peak boost. Risk band: NONE.
- Sustained
- Sustained 43 °C
- Peak boost
- Peak boost 43 °C
Power delivery
What else to know about this pairing
Warning: This board needs a BIOS update first
The MSI MAG X670E Tomahawk WiFi shipped with firmware that predates Zen 4 (Phoenix), so a board taken off the shelf may not post with the AMD Ryzen 7 8700G until its BIOS is updated.
Where the PCIe lanes go
The MSI MAG X670E Tomahawk WiFi keeps its 4 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 MSI MAG X670E Tomahawk WiFi takes DDR5, which the AMD Ryzen 7 8700G supports, and validates memory up to DDR5-6400. The board predates Zen 4 (Phoenix), so it may need a BIOS update before it posts — it has USB BIOS Flashback, which means you can do that with a USB stick and the power supply alone, without a working processor in the socket.
Updating the BIOS before you install the AMD Ryzen 7 8700G
- Step 1
Download the firmware
Get the latest BIOS for the MSI MAG X670E Tomahawk WiFi from MSI's support page and unzip it to a FAT32 USB stick.
- Step 2
Use the flash button
Rename the file as the manual specifies, plug the stick into the flash port, connect the power supply and press the flash button. No processor needs to be installed.
- Step 3
Update and verify
Let the flash finish without interrupting power, then check the BIOS version in setup before installing the AMD Ryzen 7 8700G.
Boards that run the AMD Ryzen 7 8700G 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.
BudgetA620MSIMSI PRO A620M-E
The cheapest board here that still leaves the AMD Ryzen 7 8700G real headroom.
Capacity used30 % · 58 °CAMD Ryzen 7 8700G draws 88 W of 289 W
- Socket
- AM5
- Vcore
- 6 × 55 A
- Memory
- DDR5
$109
as of 4 November 2026
EnthusiastX870EASUSASUS ROG Strix X870E-E Gaming WiFi
The most headroom of any board in the database for the AMD Ryzen 7 8700G.
Capacity used4 % · 41 °CAMD Ryzen 7 8700G draws 88 W of 2228 W
- Socket
- AM5
- Vcore
- 18 × 110 A
- Memory
- DDR5
$654.44
as of 4 November 2026
The MSI MAG X670E Tomahawk WiFi
MSI MAG X670E Tomahawk WiFi
- Socket
- AM5
- Vcore
- 14 × 80 A
- Memory
- DDR5
$390
as of 4 November 2026
- Chipset
- X670E
- Form factor
- ATX
- Vcore stages
- 14 × 80 A
- Phase design
- Doubled phases
- VRM cooling
- Heavy heatsink
- VRM tier
- Tier A
- Memory
- DDR5-6400
- BIOS Flashback
- Yes
Questions people ask about this pairing
- Will the AMD Ryzen 7 8700G throttle on the MSI MAG X670E Tomahawk WiFi?
No. The AMD Ryzen 7 8700G draws 88 W in a sustained all-core load and the MSI MAG X670E Tomahawk WiFi holds about 1260 W, so the VRM sits at an estimated 43 °C and clocks hold.
- How many power phases does the MSI MAG X670E Tomahawk WiFi have?
14 Vcore power stages rated 80 A each, in a doubled 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 MSI MAG X670E Tomahawk WiFi need a BIOS update for the AMD Ryzen 7 8700G?
Probably. The MSI MAG X670E Tomahawk WiFi shipped with firmware that predates Zen 4 (Phoenix). It has USB BIOS Flashback, so you can update it from a USB stick with no processor installed.
- What memory does the AMD Ryzen 7 8700G take on the MSI MAG X670E Tomahawk WiFi?
DDR5, in up to 4 slots, validated to DDR5-6400 on this board.
- What VRM temperature should I expect with the AMD Ryzen 7 8700G on this board?
Our model estimates 43 °C, from 38 °C of interior case air plus the stress ratio of 0.07 scaled by 65 °C. Measured numbers move with case airflow and ambient temperature, so treat this as a band rather than a reading.