SKU: 52J91AV
HP Pro Tower 400 G9 PCI Desktop PC RCTO Base Model
Contact us for pricing
Key features
- HP Secure Erase
- HP Sure Click
- Absolute Persistence module
- HP Sure Admin
- HP Tamper Lock
- HP Sure Start Gen7
- HP Sure Sense2
- HP Platform Certificate On Device Installation
- 1 headphone/microphone combo
- 1 SuperSpeed USB Type-C® 10Gbps signaling rate
- 3 SuperSpeed USB Type-A 10Gbps signaling rate
- 1 audio-out
Technical specifications
Product
| Product type | Desktops |
|---|---|
| Subcategory | Desktop and All-in-One |
| Product brand name | HP |
| UNSPSC code | 43211507 |
Processor
| Chipset | Intel® Q670 |
|---|
Memory
| Memory Slots | 2 DIMM |
|---|
Storage
| Internal drive bays | Two (3.5) 8.89 cm HDD |
|---|
Camera and audio
| Audio | Realtek ALC3252 codec, universal audio jack with CTIA and OMTP headset support |
|---|
Ports
| Ports | 1 headphone/microphone combo; 1 SuperSpeed USB Type-C® 10Gbps signaling rate; 3 SuperSpeed USB Type-A 10Gbps signaling rate, 1 audio-out; 1 power connector; 1 RJ-45; 1 HDMI 1.4; 3 SuperSpeed USB Type-A 5Gbps signaling rate; 1 DisplayPort™ 1.4; 2 USB Type-A 480Mbps signaling rate |
|---|
Software
| Available software | HP Smart Support |
|---|---|
| Software included | HP Notifications; HP PC Hardware Diagnostics UEFI; HP Support Assistant; HP Connection Optimizer; HP Privacy Settings; HP Desktop Support Utilities; HP Easy Clean; HP Setup Integrated OOBE; Buy Microsoft Office (sold separately); HP Services Scan; HPX for CMIT |
Copy and scan
| Copyright notice | © Copyright 2026 HP Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. |
|---|
Physical
| Dimensions (W x D x H) | 15.5 x 30.8 x 33.7 cm |
|---|---|
| Weight | 5.31 kg |
| Weight note (metric) | Weight will vary by configuration |
Package
| Package dimensions (W x D x H) | 40 x 28.7 x 49.9 cm |
|---|---|
| Package weight | 8.4 kg |
Sustainability
| Energy Usage CO2e (kg) | 210.483 |
|---|---|
| End of Life CO2e (kg) | 1.509 |
| Production CO2e (kg) | 128.902 |
| Total CO2e (kg) | 342.788 |
| Transportation CO2e (kg) | 1.894 |
Other
| Registration required | No |
|---|---|
| Series name | HP Pro Tower 400 G9 |
| Sub brand | Pro |
| TCO Certified | TCO Certified, generation 9 |
| Expansion slots | 1 M.2 2230; 1 M.2 2280; 1 PCIe x1; 1 PCI; 1 PCIe 4 x16 |
| Expansion slots note | 1 M.2 2230 slot for WLAN and 1 M.2 2280 slot for storage. |
| I/O Port location | Front |
| Operating humidity range | 10 to 90% RH |
| Operating temperature range | 10 to 35°C |
| Family positioning headline | Productivity and manageability in one. |
| Form factor | Tower |
| Headline | Protected by HP Wolf Security |
| Key selling point | Maintain productivity through your day with the HP Pro Tower 400, featuring the latest Intel® Core™ processor.[2] |
| Image legal disclaimer | Product image may differ from actual product |
| Segment | Business |
| Usage | Proven productivity |
| Legal tagline | HP recommends Windows 11 Pro for business |
| Overview | The HP Pro Tower 400 provides users with commercial-grade performance, security, and scalability for growing businesses. This PC is powered by the latest Intel® processor[2] and protected with always-on security you can trust. |
| Product description for SEO | One of the best Pro Tower Desktops from HP for business with a highly secure and scalable design, featuring commercial-grade performance powered for growing businesses. |
| Company | HPI |
| Code name | Mahjong |
| Product long name | HP Pro Tower 400 G9 400W -Base Unit RCTO PCI |
| Security management | Trusted Platform Module TPM 2.0 Embedded Security Chip shipped with Windows 10 (Common Criteria EAL4+ Certified)(FIPS 140-2 Level 2 Certified); HP Secure Erase; HP Sure Click; Absolute Persistence module; HP Sure Admin; HP Tamper Lock; HP Sure Start Gen7; HP Sure Sense2; HP Platform Certificate On Device Installation |
| Management features | HP Client Catalog (download); HP Driver Packs (download); HP Cloud Recovery; HP Image Assistant Gen 5 (download); HP Client Management Script Library (download); HP Manageability Integration Kit (download); HP Patch Assistant (download); HP Connect |
| Product classification flag | Base Unit-Configure to Order (CTO) |
| Tangible flag | Y |
| Ideal for | HP Pro 400 Series’ desktops provide businesses with a robust, affordable PC featuring commercial-grade performance and security for growing businesses. |
| Material Type for item | HALB |
Notes and footnotes
- A product carbon footprint is defined as the total amount of greenhouse gases emitted directly and indirectly by a product over its lifetime. Greenhouse gas emissions are reported as global warming potential for 100-year time horizon (GWP-100) in units of CO2 equivalence. Calculations are done in accordance with ISO 14040 & ISO 14044. Individual values may not sum to total due to rounding.
- [2] Multicore is designed to improve performance of certain software products. Not all customers or software applications will necessarily benefit from use of this technology. Performance and clock frequency will vary depending on application workload and your hardware and software configurations. Intel’s numbering, branding and/or naming is not a measurement of higher performance.
- [5] HP Wolf Security for Business requires Windows 10 or 11 Pro or higher, includes various HP security features and is available on HP Pro, Elite, Workstation, and RPOS products. See product details for included security features.
- [2] This system is preinstalled with Windows 10 Pro software and also comes with a license for Windows 11 Pro software and provision for recovery software. You may only use one version of the Windows software at a time. Switching between versions will require you to uninstall one version and install the other version. You must back up all data (files, photos, etc.) before uninstalling and installing operating systems to avoid loss of your data.
- [3] For hard drives and solid state drives, GB = 1 billion bytes. TB = 1 trillion bytes. Actual formatted capacity is less. Up to 36 GB (for Windows) of system disk is reserved for the system recovery software.
- [4] Your product does not support Windows 8 or Windows 7. In accordance with Microsoft’s support policy, HP does not support the Windows 8 or Windows 7 operating system on products configured with Intel® and AMD 7th generation and forward processors or provide any Windows 8 or Windows 7 drivers on http://www.support.hp.com
- [8] Molded Pulp cushions made from 100% recycled wood fiber and organic materials.
- [5] Based on US EPEAT® registration according to IEEE 1680.1-2018 EPEAT®. Status varies by country. Visit www.epeat.net for more information.
- [9] Support for three displays requires the two included video ports and configuration at purchase with optional flex port.
- [6] For DDR5 Memory: memory modules support data transfer rates up to 5600/MTs requires selected i5, i7 or i9 CPUs. Memory configuration without selected CPUs support data transfer rates up to 4800 MT/s. Actual data rate is determined by the system's configured processor. See processor specifications for supported memory data rate. All memory slots are customer accessible / upgradeable.
- [7] All memory slots are customer accessible / upgradeable.
- [8] HP Smart Support automatically collects the telemetry necessary upon initial boot of the product to deliver device-level configuration data and health insights and is available preinstalled on select products, thru HP Factory Configuration Services; or it can be downloaded. For more information about how to enable HP Smart Support or for download, please visit http://www.hp.com/smart-support
- [9] Availability may vary by country(Antimicrobial China only).
- [10] SD 4.0 with 5-in-1 Interface (Supports SD, SDXC, SDHC, UHS-I, UHS-II). Sold separately or as an optional feature.
- [11] Intel® I225-T1 PCIe® 2.5 GbE: Sold separately or as an optional feature.
- [12] Wireless access point and internet service required.
- [13] HP Sure Sense is available on select HP PCs and is not available with Windows10 Home.
- [14] HP BIOSphere Gen6 features may vary depending on the platform and configuration.
- [15] HP Secure Erase for the methods outlined in the National Institute of Standards and Technology Special Publication 800-88 "Clear" sanitation method. HP Secure Erase does not support platforms with Intel® Optane™.
- [16] HP Secure Erase for the methods outlined in the National Institute of Standards and Technology Special Publication 800-88 "Clear" sanitation method. HP Secure Erase does not support platforms with Intel® Optane™.
- [17] HP Sure Start Gen7 is available on select HP PCs.
- [18] HP Sure Admin requires Windows 10 or higher, HP BIOS, HP Manageability Integration Kit from http://www.hp.com/go/clientmanagement and HP Sure Admin Local Access Authenticator smartphone app from the Android or Apple store.
- [19] Absolute firmware module is shipped turned off and can only be activated with the purchase a license subscription and full activation of the software agent. License subscriptions can be purchased for terms ranging multiple years. Service is limited, check with Absolute for availability outside the U.S. Certain conditions apply. For full details visit: https://www.absolute.com/about/legal/agreements/absolute/.
- [20] Sold separately or as an optional feature.
- [22] HP Support Assistant: Requires Windows and Internet access.
- [7] Speaker enclosure component contains 5% ocean-bound plastic by weight.
- [24] HP Manageability Integration Kit can be downloaded from http://www.hp.com/go/clientmanagement.
- [25] Multi-Core is designed to improve performance of certain software products. Not all customers or software applications will necessarily benefit from use of this technology. Performance and clock frequency will vary depending on application workload and your hardware and software configurations. Intel’s numbering, branding and/or naming is not a measurement of higher performance.
- [26] Intel® Turbo Boost performance varies depending on hardware, software and overall system configuration. See www.intel.com/technology/turboboost for more information.
- [27] Ports are optional. Max of one Flex Port (rear) can be configured. Max of one Add-On Card can be configured, Flex Port (Front) can only be configured when SD card reader is not selected, and must be configured at time of purchase.
- [28] For full Intel® vPro® functionality, Windows 10 Pro 64 bit, a vPro supported processor, vPro enabled chipset, vPro enabled wired LAN and/or WLAN card and TPM 2.0 are required. Some functionality requires additional 3rd party software in order to run. See http://intel.com/vpro
- [29] Some functionality of vPro, such as Intel Active Management Technology and Intel Virtualization technology, requires additional 3rd party software in order to run. Availability of future "virtual appliances" applications for Intel vPro technology is dependant on 3rd party software providers. Compatibility with future "virtual appliances" is yet to be determined.
- [30] The HP 400 G9 TWR/SFF requires Intel ® Core ™ processor with DDR5 memory modules to support Wi-Fi 6E and requires a Wi-Fi 6E router, sold separately, to function in the 6GHz band. Availability of public wireless access points limited. Wi-Fi 6E is backwards compatible with prior 802.11 specs. Available in countries where Wi-Fi 6E is supported. Wi-Fi 6E is backwards compatible with prior 802.11 specs. And available in countries where Wi-Fi 6E is supported. For HP 400 G9 TWR/SFF without Intel ® Core ™ processors and DDR5 memory modules, the product does not support Wi-Fi 6E standard and does not operate under 6GHz band. The products are compatible with 6GHz and other routers, sold separately, which have capability to operate in 2.4GHz and 5GHz, in compliance with Wi-Fi 6 and prior 802.11 specs. The actual throughput depends on network condition and router configuration. Internet service required and public wireless access points are limited.
- [31] Wireless access point and internet service required and sold separately. Availability of public wireless access points limited. Wi-Fi 6 is backwards compatible with prior 802.11 specs.
- [32] Starting November 1st, 2023, HP PCs with Windows require Windows to be installed on SSD. HDD can only be configured as additional data drives and not as the boot drive.
- [63] TCO Certified is an ISO 14024 Type 1 sustainability label for IT products. Compliance with all criteria is independently verified.
