HP655 G1 WiFi Upgrade Linux

[zandoval]

HP655 G1 - Upgrade WiFi card to Athros in 4G 5G Not Broadcom or Realtek

[Samrit26]

Hello,

I’ll mentor this properly, because with HP business notebooks of this generation, Wi-Fi upgrades are not just plug-and-play.

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Platform reality check (very important)

Your HP 655 G1 uses:

• AMD platform

• BIOS wireless whitelist enforced

• Half-mini PCIe (HMC) Wi-Fi slot (not M.2)

That whitelist means:

Only HP-branded, BIOS-approved WLAN cards will work.
Any non-whitelisted card = “Unsupported wireless device detected” at POST.

This is why random Broadcom / Realtek / retail Atheros cards fail.

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What you actually want (terminology correction)

When you say “4G / 5G WiFi”, you mean:

• 2.4 GHz + 5 GHz dual-band Wi-Fi
  ❌ Not cellular 4G/5G LTE

That’s fine — the platform supports it with the right card.

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Supported Atheros (Qualcomm) option ✅

The only realistic Atheros-family upgrade for HP 655 G1 is:

✅ Qualcomm Atheros AR9462

• Dual-band 2.4 GHz / 5 GHz

• 802.11a/b/g/n

• Bluetooth 4.0

• HP-branded HMC version only

Typical HP spare numbers (region-dependent):

• 747922-001

• 709848-001

⚠️ Non-HP AR9462 cards will NOT pass the whitelist.

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What will NOT work (common mistakes)

❌ Intel Wi-Fi cards (even HP ones)
❌ M.2 Wi-Fi cards
❌ Retail Atheros cards from Amazon/eBay
❌ Any AX / AC card (platform too old)

The BIOS simply doesn’t have support.

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OS support note (critical)

• Windows 10 → Supported with legacy drivers

• Windows 11 → ❌ Not supported on this platform

  • No official Atheros AR9462 Win11 drivers

  • You’ll get instability even if it “installs”

If you’re on Windows 11 already, this is a dead end.

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Installation best practices

1. Disconnect battery and AC

2. Replace card

3. Ensure two antenna leads are connected (Main/Aux)

4. Boot → confirm no whitelist error

5. Install HP-provided driver, not generic Qualcomm

If you hit a whitelist error:

There is no software workaround
Only option = revert card or depot motherboard BIOS reflash (not recommended / not supported)

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Bottom line

• ✔️ Yes, Atheros dual-band Wi-Fi is possible

• ✔️ Only with HP-branded AR9462

• ❌ No modern Wi-Fi standards

• ❌ No Windows 11 viability

If the goal is modern Wi-Fi, the honest answer is:

External USB Wi-Fi adapter or replace the system