HP ProBook 450 G6 Notebook PC upgrade guide

Updated Oct. 30, 2026 · Written from this device's verified specifications

The HP ProBook 450 G6 is a friendly laptop to upgrade: both RAM slots are accessible and there are two storage bays to play with. The one thing you cannot change is the processor, which is soldered to the motherboard. Below we run through what fits in each category, the limits, and what to watch out for before you buy.

At a glance

  • 2x DDR4 SO-DIMM slots, up to 32 GB total (2 x 16 GB), 2400 MT/s
  • One M.2 2280 slot (SATA or PCIe NVMe Gen3 x4) plus one 2.5-inch 7 mm SATA bay
  • Processor is soldered and cannot be upgraded
2x DDR4 SO-DIMM, up to 32 GB total2 × DDR4 SO-DIMM · up to 32 GB total · 2400 MT/s
M.2 2280 (SATA/NVMe) + 2.5" 7 mm SATA bay2 × SSD / HDD M.2 2280 / 2.5" (NVMe / SATA) · max 7 mm thick
2 × SO-DIMM · DDR4up to 32 GB totalM.2 2280 (SATA/NVMe) + 2.5" 7 mm SATA bay2 × SSD / HDD M.2 2280 / 2.5" (NVMe / SATA) · max 7 mm thick
Schematic of the upgradeable slots (not to scale). Check the owner's manual for their exact positions.

Lifecycle and support

Standard support ended on December 2025 (estimate).

2018201920202021202220232024202520262027Today11 · Release · December 201822 · End of sale · January 202133 · EOL · January 202144 · EOSL · December 2025
Filled dots: dates published by the manufacturer. Hollow dots: estimates from third-party sources.
MilestoneDate
Release
First available to buy.		 December 2018 Estimate HP's own Maintenance and Service Guide (L46758-001) is 'First Edition: December 2018' and the HP datasheet (c06142921) change log begins 2018-12-10; HP published no press release, so the date is taken from HP's own document dating (iFixit agrees: https://www.ifixit.com/Device/HP_ProBook_450_G6).
Source ↗
End of sale
No longer sold new by the manufacturer (Dell calls this 'End of Life', Lenovo 'Withdrawn').		 January 2021 Estimate Hitachi (HP channel partner) lists 販売終了年月 2021-01 for the 450 G6/CT; HP publishes no discontinuation date on https://support.hp.com/us-en/product/details/hp-probook-450-g6-notebook-pc/23201167. Globally the line was superseded by the ProBook 450 G7 during 2020.
Source ↗
End of life (EOL)
The manufacturer stops developing the product: no new BIOS, firmware or driver releases.		 January 2021 Estimate HP uses no Dell-style EOL label for notebooks; end of life is taken as end of production/end of sale. HP's datasheet policy (https://www.pclife.bg/files/product_documents/c06142921_16.pdf) promises spare parts 'for up to 5 years after the end of production' (~2026), but this is a policy statement, n
Source ↗
End of standard support (EOSL)
Standard warranty and support contracts can no longer be renewed.		 December 2025 Estimate Hitachi 保守期限 2025-12. HP itself publishes no end-of-support date; the driver/BIOS pages remain live (https://support.hp.com/hr-en/document/c06191146).
Source ↗

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

RAM upgrade

What fits. The ProBook 450 G6 has 2x DDR4 SO-DIMM slots, and neither module is soldered down — both are user-accessible. Each slot takes up to 16 GB, for a maximum of 32 GB total (2 x 16 GB). The memory is standard DDR4 SO-DIMM, non-ECC and unbuffered.

Limits. The official speed is DDR4-2400 (2400 MT/s). If you fit faster-rated sticks, they simply run at 2400 MT/s — and at 2133 MT/s if your machine has the Celeron 4205U. If you mix speeds, the system runs everything at the slower speed. HP's parts page lists 2666 MHz modules for this model, which is confusing: the modules are physically compatible, but HP's own documents cap the effective rate at 2400 MT/s.

What to watch out for. Buy JEDEC-standard memory with normal timings — DDR4-2400 CL17, DDR4-2666 CL19 or DDR4-3200 CL22 are the safe specs. HP support warns that low-latency gaming modules such as Corsair Vengeance LPX CL16 are almost guaranteed not to work here. Mixing sizes (for example 4 + 16 GB for 20 GB) does work and gives you more memory, but you lose the full benefit of matched dual-channel performance; two identical sticks are the better choice if you want the speed as well as the capacity.

Buying tips. Check what you already have (one stick or two, and the size) so you don't buy a second 8 GB stick when you already have 16 GB fitted. If you only want a modest bump, keeping the factory stick and adding one matching module is the cheapest route; if you want 32 GB, buy a matched 2 x 16 GB kit and start fresh.

Buying tips

  • Match the modules: same size and speed for full dual-channel.
  • Avoid low-latency gaming RAM; buy JEDEC-standard modules.
  • Update the BIOS before you fit new RAM — HP warns that skipping this can cause problems.

Cheapest compatible right now

See all compatible parts and prices →

How to upgrade

Steps

  1. A safe, general upgrade outline
    This outline covers any part you are adding. For exact disassembly instructions, screw locations and connector details, follow the owner's or maintenance and service guide for the ProBook 450 G6. 1. Back up anything you cannot afford to lose before opening the case. 2. Save your work, shut the laptop down fully, and unplug the power adapter. Disconnect anything else attached. 3. Ground yourself (touch a grounded metal object or use an anti-static strap) so static doesn't damage the parts. 4. Open the case as described in the manual, and install the new module or drive in the correct slot or bay. 5. Close the case, reconnect the power and switch on. 6. Check that the BIOS/firmware sees the new part and reports the expected capacity — and if you are adding RAM, update the BIOS first (HP warns that new RAM installed on old firmware can cause problems). If something is not detected, power off again and reseat the module or drive before troubleshooting further.

Good to know

  • HP only certifies drives up to 512 GB (M.2) and 1 TB (HDD); larger aftermarket drives usually work but are not officially validated.
  • Formatted capacity is lower than advertised capacity, and Windows may reserve space for recovery.

Frequently asked questions

How much RAM can the HP ProBook 450 G6 take?

Up to 32 GB total, as 2 x 16 GB DDR4 SO-DIMM modules (16 GB per slot). Both slots are user-accessible.

Does the ProBook 450 G6 support NVMe SSDs?

Yes — the M.2 2280 slot supports PCIe NVMe Gen3 x4 as well as SATA. But not on Pentium or Celeron models: those are limited to a SATA M.2 SSD. Check which CPU your machine has before buying an NVMe drive.

Can I add a second drive?

Yes. There is one 2.5-inch SATA 3.0 bay alongside the M.2 slot, but it only takes 7 mm drives — 9.5 mm drives will not fit. If your machine shipped without a 2.5-inch drive, you may need the caddy and cable.

Can I upgrade the CPU in my ProBook 450 G6?

No. The processor is soldered to the motherboard (15 W Intel Whiskey Lake U-series, Celeron 4205U up to Core i7-8565U depending on the SKU) and is not user-replaceable. Note that processor availability varies by region and configuration — the exact CPU list differs slightly between HP's documents.

Is there an optical drive or card reader?

There is no optical drive, ExpressCard or other proprietary expansion bay. You do get a full-size SD card reader (SD, SDHC, SDXC).

Do I need to update the BIOS before upgrading?

For RAM, yes — HP explicitly warns that installing new memory on older firmware can cause problems, so update the BIOS first. It is good practice for any upgrade to then check in the BIOS that the new part is detected.

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.