HP ProDesk 400 G4 SFF
Specification and Upgrade Options
The HP ProDesk 400 G4 SFF is a pre-built entry-level business desktop computer first released in 2017. Although more than five years old, it is still a viable solution for home and office. The motherboard is using the H270 chipset and supports 7th gen Intel Core processor, 64GB of DIMM DDR4-2400 memory, and a low profile GPU. You can even make a gaming PC form this machine with a proper GPU upgrade.
HP ProDesk 400 G4 SFF is a Small form factor computer. The Small Form Factor (SFF) is an in-between model. It has less space for the larger form factors (Mid tower, Mini tower, and Desktop), but it is still easily upgradable. Usually the SFF come with 2x PCIe slots, so fitting a low profile graphics card is possible.
Can you upgrade HP ProDesk 400 G4 SFF to play games?
Yes, you can upgrade HP ProDesk 400 G4 SFF for gaming with better processors, graphics card, memory, and storage devices. However, like many other business pre-built PCs, this model may have proprietary elements like the power supply, the chassis or the power connector, which can make it difficult for users to install aftermarket PSUs to support better GPUs. You can also find that there is space constrains inside the chassis, making it difficult to accommodete larger GPU to boost the gaming performance.
Please explore the sections bellow to find ideas and suggestions on how to upgrade HP ProDesk 400 G4 SFF.
Windows 11 compatibility
No, HP ProDesk 400 G4 SFF does not meet the Windows 11 hardware requirements. According to Windows 11 specification, all models with Intel 7th Gen CPU or older are not officially supported. Processor with TPM 2.0 and a UEFI Secure boot BIOS is also required in order to upgrade from Windows 10 to Windows 11 through Windows Update.
However, anyone with PC that does not pass the upgrade test can download the official Windows 11 ISO, make a bootable flash drive, and install the OS manually.
GPU upgrade
To upgrade the GPU of OptiPlex 7040 SFF, a low-power, low-profile graphics card must be used. Currently, the most reasonable GPU option is AMD's Radeon RX 6400 low profile. This model has a good price point, delivers decent FPS, and does not require any addtional hardware upgrades.
The low power requirements of this model make it the perfect option for an SFF gaming build. The RX 6400 low does not need any additional power from the PSU and can rely solely on the power delivered by the PCIe slot (75W).
GPU upgrade options for HP ProDesk 400 G4 SFF with the stock 180W power supply:
| GPU | Power consumption | Memory | Req. |
|---|---|---|---|
| RX 6400 Low profile | 50 W | 4 GB DDR6 | Works with no additional hardware changes |
| GTX 1050 Ti Low profile | 75 W | 4 GB DDR5 | Works with no additional hardware changes |
| GTX 1650 Low profile | 75 W | 4 GB DDR5 | Works with no additional hardware changes |
| RTX A2000 Low profile | 70 W | 6 GB DDR6 12 GB DDR6 |
Works with no additional hardware changes |
Keep in mind that these low-profile, low-power GPUs can be quite noisy and may run hot when under full load.
Processor
The HP ProDesk 400 G4 SFF supports Gen7 Intel Core technology. The 7th generation of Intel Core processors were introduced in 2016. Named Kaby Lake, they are refresh of the 6th gen architecture with few efficiencies and power improvements and the same 14nm manufacturing process. Kaby Lake introduces a new graphics architecture that improves 3D performance, 4K playback and HDCP 2.2 support. Processors in this generation use LGA 1151 socket and have dual-channel support for DDR4-2400 RAM slots.
Best CPUs for HP ProDesk 400 G4 SFF upgrade:
| Model | Cores (Threads) | Base frequency | Turbo |
|---|---|---|---|
| Core i5 7500 | 4(4) | 3.4 GHz | 3.8 GHz |
| Core i5 7600 | 4(4) | 3.5 GHz | 4.1 GHz |
| Core i7 7700 | 4(8) | 3.6 GHz | 4.2 GHz |
Memory
HP ProDesk 400 G4 SFF has two RAM slots. This is more than enough for most users. For those of you who need extra flexibility and RAM size, go for a model with 4 memory slots.
To cover the needs of your OS, games, and apps, HP ProDesk 400 G4 SFF supports up to 64 GB of DIMM DDR4-2400 RAM. For office work, home use, and light gaming we recommend 8GB of RAM. For everything else, use 16GB or more.
Faster RAM speeds permit your processor to access the data stored inside the memory faster. This is important for the overall speed of your system. The motherboard of the HP ProDesk 400 G4 SFF supports RAM speeds of up to 2400 MT/s.
Wi-Fi Support
HP ProDesk 400 G4 SFF supports Wi-Fi and Bluetooth combo card with the on-board M.2 2230 (Wi-Fi/BT) slot. The card contains a Wi-Fi module that supports various Wi-Fi standards, as well as a Bluetooth module. It is small circuit board that is designed to fit into a dedicated slot on the motherboard.
Keep in mind that the card is not always included and you have to install one yourself.
Wi-Fi and Bluetooth wireless adapter upgrades for HP ProDesk 400 G4 SFF:
| Model | Speed | Frequency | Interface |
|---|---|---|---|
| WiFi 6E (Gig+) Kit | 3000 Mbit/s | 2.4GHz / 5GHz | NGFF M.2 A/E Key |
| Rekong AX210 | 3000 Mbit/s | 2.4GHz / 5GHz | NGFF M.2 A/E Key |
| Gigabyte GC-Wbax200 | 2400 Mbit/s | 2.4GHz / 5GHz | PCIe |
| TP-Link Archer TX50E | 2400 Mbit/s | 2.4GHz / 5GHz | PCIe |
| TP-Link Archer T9UH | 1300 Mbit/s | 2.4GHz / 5GHz | USB 3.0 |
Ports
Ports are important and often people don't think about them when buying a PC. For example, if you don't have enough USB ports, using external devices becomes problematic. Before you buy any system, considering your use case, check the number of external devices you are going to use and plan the number of the extension ports accordingly.
USB ports
The HP ProDesk 400 G4 SFF comes with eight USB ports in total. Having more USB ports is always better, but also pay attention to the version of those USB ports. Higher version ports support faster transfer speeds. Unfortunately, this model doesn't come with a USB 3.1 port. If you need a faster connection for your peripherals, like external Solid State Drive, you will need to choose another model.
Video ports
The DisplayPort (DP) is the most widely used digital interface for transmitting digital video and audio between display devices and PCs. It is good to see that the HP ProDesk 400 G4 SFF is featuring a DisplayPort 1.2. The post version is important if you target higher resolutions with high refresh rate. Although, ver. 1.2 is completely fine for most users, if possible, aim for the higher versions DisplayPort.
The HDMI port is another digital video port you can use to connect external display. It has very similar capabilities to the DisplayPort with few exceptions. However, the HP ProDesk 400 G4 SFF doesn't have one. This is not a problem if there is on-board DisplayPort.
*Please keep in mind in order to use the video ports available through the motherboard, you need a CPU with integrated graphics card. If you have a dedicated GPU, use his ports instead.
SSD storage - M.2 sockets and SATA ports
The SATA port is one of the places where you can connect a stora gedevice. The HP ProDesk 400 G4 SFF comes with two SATA port(s). Not enough SATA ports might limit your options for additional storage devices. Think about your use case and decide if the SATA ports provided by this model will be sufficient.
Unfortunately, the HP ProDesk 400 G4 SFF has no M.2 PCIe soket and you have to rely on the available SATA ports to connect your drives.
The M.2 PCIe SSD connector in combination with an NVMe drive allows for higher transfer rates, compared to the old SATA interface. In some situations, NVMe device connected to the M.2 PCIe socket can be more than 5 times faster.
Power Supply
The HP ProDesk 400 G4 SFF comes with a 180 Watt PSU. Having a power supply with high power rating is important, especially if you are doing upgrade with addtional components, like dedicated GPU and more HDDs. Will this 180 W be enough, it all depends on your specific use. Please keep in mind that some models might have more than one PSU option. Whenever possible get the most powerful one, as it might make future upgrades easier.
Motherboard
