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Looking to upgrade the Pro SFF 400 G9? This guide covers RAM and storage upgrades for the 2023 Pro SFF 400 G9 (Intel Core i5-13500).
Supports DDR4 UDIMM or DDR5 UDIMM depending on build (up to 128GB, 4 slots) and M.2 2280 NVMe PCIe 4.0 (2 SSD slots).
Pro SFF 400 G9 — Quick Specs
| Specification | Details |
|---|---|
| Processor | Intel Core i5-13500 |
| Memory Type | DDR4 or DDR5 UDIMM (depends on build; check the installed module) |
| Max RAM | 128GB |
| RAM Slots | 4 UDIMM slots |
| Storage | M.2 2280 NVMe PCIe 4.0 |
| M.2 Slots | 2 |
| Year | 2023 |
RAM Upgrade — Pro SFF 400 G9
The Pro SFF 400 G9 has 4 UDIMM slots supporting (depending on build) DDR5 or DDR4, max 128GB.
Dual-channel support: For best performance, install matching pairs for dual-channel mode.
Compatible RAM Configurations
| Total | Configuration | Best For | Buy |
|---|---|---|---|
| 16GB | 2x 8GB | Basic multitasking | Check Price |
| 32GB | 2x 16GB | Productivity & light gaming | Check Price |
| 64GB | 2x 32GB | Professional workloads | Check Price |
| 128GB | 4x 32GB | Heavy workloads | Check Price |
View Compatible DDR4 UDIMM on Amazon
SSD Upgrade — Pro SFF 400 G9
The Pro SFF 400 G9 supports M.2 2280 NVMe PCIe 4.0 with 2 SSD slots.
Compatible SSD Options
| Capacity | Interface | Best For | Buy |
|---|---|---|---|
| 256GB | M.2 2280 NVMe | Budget | Check Price |
| 512GB | M.2 2280 NVMe | Standard | Check Price |
| 1TB | M.2 2280 NVMe | Recommended | Check Price |
| 2TB | M.2 2280 NVMe | Power user | Check Price |
View Compatible NVMe SSDs on Amazon
Installation Guide — Pro SFF 400 G9
- Power off and disconnect cables.
- Remove side panel.
- Ground yourself.
- Locate DIMM and M.2 slots.
- RAM: Open clips, align notch, press down.
- SSD: Remove screw, insert at angle, secure.
- Reassemble.
- Power on, verify in BIOS.
Recommended Products
| Product | Type | Why | Buy |
|---|---|---|---|
| DDR4 UDIMM Kit | RAM | Compatible for Pro SFF 400 G9 | View on Amazon |
| M.2 2280 NVMe SSD 1TB | Storage | NVMe upgrade | View on Amazon |
Frequently Asked Questions
What RAM does the Pro SFF 400 G9 use?
DDR4 or DDR5 UDIMM depending on build (check the installed module), 4 slots, up to 128GB.
Can I upgrade RAM?
Yes, 4 user-accessible UDIMM slots, max 128GB.
What SSD is compatible?
M.2 2280 NVMe PCIe 4.0, 2 SSD slots. There is also a 3.5-inch SATA drive bay.
Maximum storage?
4TB (1x 4TB).
Related HP Upgrade Guides
- HP Z2 G9 SFF RAM & SSD Upgrade Guide (2023)
- HP EliteDesk 800 G9 Mini RAM & SSD Upgrade Guide (2023)
- HP EliteDesk 800 G9 SFF RAM & SSD Upgrade Guide (2023)
- HP EliteDesk 800 G9 Tower RAM & SSD Upgrade Guide (2023)
- HP Pro Tower 400 G9 RAM & SSD Upgrade Guide (2023)
- HP Upgrade Guide
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
Helpful Guides
Upgrades that fit the HP Pro SFF 400 G9 Desktop PC
What fits: Memory: DDR4 or DDR5 (varies by system board/build) UDIMM, 4 user slots, up to 128GB
Spec source: kaas.hpcloud.hp.com (checked 26 Sep 2026).
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