HP EliteBook 850 G8 upgrade guide: RAM, SSD and what you can't change

Updated Oct. 18, 2026 · Written from this device's verified specifications

The EliteBook 850 G8 (15.6-inch G8, e.g. part number 171L0EA) is friendlier to upgrade than most thin business laptops. Memory and storage are both user-serviceable: two RAM sockets and one M.2 SSD bay. The processor is not — it's soldered to the system board. Below we explain what fits, what the limits are, and what to watch out for before you buy parts. Configuration varies by part number (smart card reader, NFC, WWAN, CPU, RAM, SSD and display all differ), so check your exact machine first. The HP Maintenance and Service Guide has the exact disassembly for your unit.

At a glance

  • RAM: 2x DDR4 SO-DIMM, up to 64 GB, 3200 MT/s, non-ECC
  • Storage: 1x M.2 2280 PCIe NVMe (Gen3 x4) — no 2.5-inch bay
  • CPU: soldered 11th-Gen Intel Tiger Lake, not upgradeable
2× DDR4 SO-DIMM (up to 64 GB, 3200 MT/s)2 × DDR4 SO-DIMM · up to 64 GB total · 3200 MT/s
1× M.2 2280 PCIe NVMe (Gen3 ×4)SSD M.2 2280 (NVMe) · up to 2.048 TB
2 × SO-DIMM · DDR4up to 64 GB total1× M.2 2280 PCIe NVMe (Gen3 ×4)SSD M.2 2280 (NVMe) · up to 2.048 TB
Schematic of the upgradeable slots (not to scale). Check the owner's manual for their exact positions.

Lifecycle and support

No longer sold new. Supported until Oct. 21, 2027 (estimate).

202020212022202320242025202620272028Today11 · Release · Dec. 7, 202022 · End of sale · Oct. 21, 202233 · EOL · Oct. 21, 202744 · Extended support ends · Oct. 21, 2027
Filled dots: dates published by the manufacturer. Hollow dots: estimates from third-party sources.
MilestoneDate
Release
First available to buy.		 Dec. 7, 2020 Estimate Third-party (iFixit). The same page is internally contradictory ('December 2022'), so treat as approximate; HP only classifies the unit as a '2021 notebook PC' (https://support.hp.com/us-en/document/ish_10322031-10322082-16) and publishes no launch date.
Source ↗
End of sale
No longer sold new by the manufacturer (Dell calls this 'End of Life', Lenovo 'Withdrawn').		 Oct. 21, 2022 Official HP Japan sales-end notice ('販売終了'); corresponds to Dell 'End of Life' / Lenovo 'Withdrawn'.
Source ↗
End of life (EOL)
The manufacturer stops developing the product: no new BIOS, firmware or driver releases.		 Oct. 21, 2027 Estimate Derived from HP's post-warranty service end date rule (business hardware: sales end + 5 years = 21 Oct 2022 + 5 y). Not model-specific; verify in HP's tool. HP published no separate BIOS/firmware/driver development end date (BIOS still refreshed March 2024).
Source ↗
End of extended support
Paid extended support ends; after this there is no manufacturer support at all.		 Oct. 21, 2027 Estimate Care Pack / post-warranty service hard cutoff (ポストワランティサービス終了日); same derived date as above.
Source ↗

Dates not listed haven't been published by the manufacturer or a reliable third party.

Memory (RAM)

The 850 G8 has two 260-pin DDR4 SO-DIMM sockets and no soldered memory at all, so every gigabyte is socketed and replaceable. Take DDR4-3200 (PC4-25600) modules at 1.2 V, non-ECC and unbuffered. The practical ceiling is 32 GB per module, 64 GB in total — HP, Kingston and independent teardowns agree on this figure. Faster modules will simply clock down to what the platform runs, and if you mix speeds, both sticks run at the slower of the two.

The sockets sit under a metal bracket inside the case, so there's a little more to undo than on some laptops. Two things matter more than the spec sheet suggests. First, buy matched pairs: single-stick setups run single-channel, and Intel's Iris Xe integrated graphics performance drops noticeably without dual-channel memory (HP calls this out itself), which affects everyday graphics work and light gaming as well as CPU performance. Second, HP says it recommends HP-branded modules because some third-party modules don't behave to industry-standard expectations; plenty of owners use third-party sticks without trouble, but if you hit instability or memory that isn't detected, that's the first suspect.

Buying tip: a matched kit of two identical DDR4-3200 SO-DIMMs (2x8 GB, 2x16 GB or 2x32 GB) is the safest buy, and it keeps you in dual-channel mode from the start.

Buying tips

  • Buy two identical sticks, not one large one — dual-channel matters for Iris Xe.
  • DDR4 SO-DIMM, 3200 MT/s, 1.2 V, non-ECC unbuffered; up to 32 GB per stick, 64 GB total.
  • Don't mix speeds — both modules will run at the slower rate.
  • HP recommends HP-branded modules; keep that in mind if you see memory errors with third-party sticks.

Storage (SSD)

There is a single M.2 2280 (22 x 80 mm) M-key slot with a PCIe NVMe interface, wired for PCIe Gen3 x4. There is no SATA connector and no 2.5-inch bay, so an upgrade means replacing — and usually cloning — your boot drive rather than adding a second disk. Physically the slot wants a single-sided drive around 2.3 mm thick; double-sided drives or models with chunky heatsinks may not clear the case.

Speed-wise the platform is Gen3 x4. Gen4 and Gen5 NVMe drives will fit and work, but they run at Gen3 speeds, so you pay for bandwidth you can't use. The other end of the scale matters too: the 128 GB and so-called "Value" factory SSDs are only Gen3 x2 and roughly half as fast sequentially, so don't judge the laptop by those. HP's largest factory option is 2 TB; larger 2280 NVMe drives generally work, since the limit is the single slot rather than a hard capacity cap. One documentation wrinkle: HP's quickspec lists the 1 TB entry as Gen3 x2 while describing the 256 GB, 512 GB and 2 TB drives as Gen3 x4 — that looks like a paperwork inconsistency, and the platform itself supports Gen3 x4.

Two factory options are worth matching if you care about them. Some models shipped with self-encrypting OPAL2 SED drives; if you rely on hardware-accelerated encryption, pick a comparable drive when upgrading. Others shipped with an Intel Optane H10 (QLC SSD plus 32 GB Optane) that only functions with Intel RST support — swap the SSD and the Optane acceleration is gone regardless. Also note that the internal M.2 slots for the optional WWAN and the WLAN module are not storage bays. There's no SD or microSD card reader in HP's specifications or the service manual parts list; what appears is an optional smart card reader and optional NFC module, and both vary by SKU.

Buying tip: a single-sided M.2 2280 PCIe NVMe (Gen3 x4 class) drive is the right shape — check the drive height before ordering anything with a heatsink.

Buying tips

  • M.2 2280 M-key NVMe, single-sided, roughly 2.3 mm — avoid thick or double-sided drives.
  • Gen3 x4 is the ceiling; Gen4/Gen5 drives work but add no speed.
  • Only one slot — plan to clone or reinstall onto the new drive.
  • Need hardware encryption? Look for an OPAL2 self-encrypting drive to match the factory SED option.

How to upgrade

Before you start

  • Back up your data (and clone your drive if you're swapping the SSD).
  • Shut the laptop down fully, unplug the charger, and remove the battery where applicable — the base cover and battery come off with standard tools.
  • Ground yourself to avoid static damage to the board and modules.
  • Open the case using the HP Maintenance and Service Guide for your model; the base cover comes off relatively easily, and the RAM sits under a metal bracket inside.
  • Install the part, close the case, and power on.
  • Check that the BIOS and firmware report the new memory capacity or drive correctly, then let the OS update drivers as needed.

Steps

  1. 1. Back up first
    Save your data before opening anything. For a drive swap, clone the existing SSD to the new one beforehand, since there's only one slot and you can't run both at once.
  2. 2. Power down and unplug
    Shut down (not sleep), disconnect the charger, and remove the battery where your unit allows. Let the machine sit a moment before opening it.
  3. 3. Ground yourself
    Work on a clean, non-static surface and discharge any static from your hands before touching the memory or SSD.
  4. 4. Open the case and install
    Follow the HP Maintenance and Service Guide for the exact screw locations and cover removal. Fit the SO-DIMMs in the two sockets under the metal bracket, or seat the single-sided M.2 2280 NVMe drive in the one M.2 slot, then close everything back up.
  5. 5. Check the BIOS
    Start the laptop and confirm the BIOS and firmware see the full memory amount or the new drive. If the new memory isn't detected, reseat it and make sure the modules are a matched pair; if the drive isn't listed, check that it's a single-sided 2280 NVMe model.

Good to know

  • Sustained CPU performance is thermally limited to roughly 20 W; burst loads can reach around 50 W briefly.
  • Specifications vary by part number (171L0EA is one European SKU among many) — confirm your own configuration before ordering parts.

Frequently asked questions

How much RAM can the HP EliteBook 850 G8 take?

64 GB, as two 32 GB DDR4-3200 SO-DIMMs. There is no soldered memory — both slots are sockets, and HP, Kingston and independent teardowns all agree on the 64 GB maximum.

Can I upgrade the CPU in the EliteBook 850 G8?

No. The 11th-Gen Intel Tiger Lake processors are soldered to the system board. HP's service manual lists the system board as a single assembly, so the only practical 'upgrade' is replacing the whole board with one built for the same model.

Does it support a Gen4 or Gen5 NVMe SSD?

Physically yes — a standard M.2 2280 NVMe drive fits and works — but the slot is PCIe Gen3 x4, so a Gen4 or Gen5 drive runs at Gen3 speeds. Save your money and buy a good Gen3 x4 drive.

How many SSDs can I install?

One. There is a single M.2 2280 NVMe slot and no SATA or 2.5-inch bay, so storage upgrades mean replacing and cloning your boot drive. The internal M.2 slots for optional WWAN and WLAN are not storage bays.

Do I need to install RAM in matched pairs?

It's strongly recommended. Single-stick setups run single-channel and Intel Iris Xe graphics performance drops noticeably without dual-channel memory, as HP notes. If you mix module speeds, both sticks run at the slower speed.

Does the EliteBook 850 G8 have an SD card slot?

Not according to HP's specifications or the service manual parts list. What appears there is an optional smart card reader and an optional NFC module — both depend on your exact part number, so verify your configuration.

Official documents and references

This guide was written with AI assistance from the compatibility data PartsPrices verified against the manufacturer's documents. Always check your exact model and the owner's manual before buying or opening your computer.