Evidence note: This is a research-backed analysis of the GMKtec K8 Plus as a Proxmox host. It combines GMKtec’s system specifications , AMD’s Ryzen 7 8845HS specifications , Proxmox documentation, and attributable owner reports. It is not a first-hand RunAHomeLab hardware benchmark. Community reports identify possible failure modes but do not prove that every unit is affected. See the research methodology .

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. RunAHomeLab may receive a commission at no extra cost to you. Affiliate relationships do not change the evidence standard or recommendation status.

Quick Take

The K8 Plus is a conditional recommendation for a Proxmox lab that will use its expansion: dual 2.5GbE, two M.2 storage positions, and OCuLink. If the lab only needs one Ethernet port and one system drive, a simpler mini PC or a used business system may offer better value.

The important distinction is between documented capability and verified behavior. The Ryzen 7 8845HS supports AMD virtualization, but CPU support alone does not guarantee convenient IOMMU grouping, reliable iGPU reset behavior, or compatibility with every OCuLink device.

What Is Verified

As reviewed on September 19, 2026, GMKtec lists the K8 Plus with a Ryzen 7 8845HS, Radeon 780M graphics, dual 2.5GbE, two M.2 2280 storage positions, OCuLink, two DDR5-5600 SO-DIMM slots with support up to 128GB, and Wi-Fi 6E. Published limits and retailer listings have differed over time, so confirm the exact configuration and supported memory before ordering. AMD documents the 8845HS as an 8-core/16-thread processor with AMD-V and DDR5 support.

Those are platform and system specifications. They do not establish Proxmox throughput, sustained thermals, acoustics, or passthrough reliability on their own.

Installing Proxmox: What to Check

Run the current Proxmox VE installer and verify the exact hardware before building bridges or passthrough rules:

lspci -nn
ip -br link
lsblk -o NAME,MODEL,SIZE,TYPE

Map each physical Ethernet jack to its Linux interface rather than assuming the firmware or chassis order matches the interface names.

Secure Boot

Do not disable Secure Boot as a universal first step. Current Proxmox VE supports Secure Boot with its signed boot chain. A third-party or locally built kernel module can still require additional signing or a different Secure Boot decision, so follow the current Proxmox Secure Boot documentation for the software you actually install.

IOMMU and Passthrough

Enable the relevant virtualization and IOMMU options in firmware, then confirm what the running kernel detected:

journalctl -b 0 | grep -Ei 'AMD-Vi|IOMMU'

Inspect the real IOMMU groups on the exact BIOS and Proxmox version you are using:

for d in /sys/kernel/iommu_groups/*/devices/*; do
  n=${d#*/iommu_groups/*}
  n=${n%%/*}
  printf 'IOMMU group %s ' "$n"
  lspci -nns "${d##*/}"
done

amd_iommu=on is an AMD kernel parameter, not an “Intel-era” option. Do not add or remove kernel parameters by folklore: check the current Proxmox and kernel documentation and first verify whether AMD-Vi already initialized on your installation.

Devices in one IOMMU group normally share an isolation boundary. Passing through an OCuLink-connected device therefore depends on the actual group layout, firmware, device, and VM configuration—not merely on the presence of an OCuLink connector.

OCuLink exposes PCIe connectivity and can be useful for a dedicated GPU or another compatible PCIe device. It is not a general-purpose hot-plug port. Power the system and attached hardware down before changing the connection unless both vendors explicitly document a safe procedure.

For a Proxmox purchase, treat OCuLink passthrough as a project to validate, not a guaranteed appliance feature. Budget for the dock or adapter, its power supply, and troubleshooting time.

Dual 2.5GbE

Two physical interfaces can support a router/firewall VM, separated lab networks, or a management/storage split. They do not make a virtualized router automatically resilient: the host, bridge configuration, and VM remain part of the failure domain.

Measure your own network path with a tool such as iperf3, using suitable peers and cabling. A 2.5GbE link rate is not the same as an independently verified end-to-end throughput result.

The K8 Plus uses Intel i226-class networking according to the system listing. The related igc driver also supports I225-family controllers. A documented I225-V reset-loop report on a different system does not prove the K8 Plus i226 controller has the same defect; use the I225-V investigation only as a diagnostic pattern if logs show repeated NETDEV WATCHDOG or adapter resets.

Thermals and Noise

The 8845HS can operate across configurable power limits, but RunAHomeLab has not measured K8 Plus temperature, acoustic level, or sustained Proxmox performance. Start with a balanced vendor power profile, monitor the actual host, and change one variable at a time:

sensors
journalctl -k -b | grep -Ei 'thermal|throttl'

Manufacturer fan design and power-profile options are specifications, not proof of bedroom-safe noise or long-term thermal behavior.

Community Evidence: 8845HS iGPU Passthrough

One K8 Plus owner reported that 8845HS iGPU passthrough could become unreliable after a guest shutdown and that the attempted Radeon reset workarounds were not reliable for their configuration. The report is useful as a buying warning for anyone whose purchase depends on repeatedly switching the iGPU between guests, but it is one configuration—not a population-wide failure rate. Read the original Proxmox forum report before deciding whether that use case is acceptable.

What Remains Unverified by RunAHomeLab

  • Proxmox installation behavior on every current BIOS revision
  • the exact IOMMU group layout for every attached OCuLink device
  • sustained 24/7 temperature and fan behavior
  • measured 2.5GbE throughput and packet-loss behavior
  • stable iGPU reset across repeated guest start/stop cycles
  • long-term failure rates

These unknowns are why the recommendation remains conditional.

Who It Is For

Potentially a good fit:

  • you need two physical 2.5GbE interfaces;
  • you want two internal M.2 storage positions;
  • you have a specific OCuLink experiment and accept validation work;
  • you value compactness more than desktop-class expansion.

Compare another option when:

  • one NIC and one SSD are sufficient;
  • low acoustic risk matters more than expansion;
  • iGPU passthrough must work predictably after guest restarts;
  • a used business PC offers more RAM or storage expansion at the current price.

Buying Checklist

Before ordering, verify the exact listing’s CPU, installed RAM and module count, SSD capacity, seller, warranty, included power supply, and return policy. Prices and bundled configurations change.

Considering the K8 Plus for Your Proxmox Lab?

If you need dual 2.5GbE, two M.2 storage positions, and OCuLink, check the current configuration, seller, and price before ordering.

Check current GMKtec K8 Plus price on Amazon →

The K8 Plus is the expandable candidate in the best mini PC for Proxmox guide. It is not automatically the best choice just because its specification list is longer.