Intel Core i5-12400 Small Form Factor Office PC – Built in the UK
The Punch SFF i5-12400 is a pre-built i5-12400 small form factor office PC for home offices, small businesses and everyday desk-based work.
If you need a compact, reliable desktop without waiting for a build, this i5-12400 small form factor office PC is built and tested in the UK, held in stock and available for next-day delivery. It is a fixed specification system with no customisation, so the configuration described on this page is exactly what you receive. Inside an ultra small form factor chassis it combines an Intel Core i5-12400 processor, 16GB of DDR4 memory, a 500GB NVMe SSD and genuine, pre-installed Windows 11 Professional.
The Punch SFF i5-12400 is built on an Intel Core i5-12400 processor with six cores and twelve threads, integrated graphics, 16GB of DDR4 3200MHz memory in two 8GB modules and a 500GB WD Blue SN580 NVMe SSD. It runs Microsoft Windows 11 Professional (genuine, pre-installed) and comes with a 3-year parts and labour warranty.
Intel Core i5-12400 processor for everyday multitasking
The Intel Core i5-12400 has 6 cores and 12 threads, with a base frequency of 2.5GHz and a maximum turbo frequency of 4.4GHz. It has 18MB of L3 cache and uses the LGA1700 socket, fitted to a Gigabyte H610M-S2H V3 Micro-ATX motherboard with the Intel H610 Express chipset. That gives plenty of headroom for office suites, browser tabs, email and video calls running side by side. The processor includes integrated graphics, so no separate graphics card is needed for desktop work. It is cooled by an Arctic Alpine 17 LP low-profile air cooler, a 55mm design rated for 95W that is sized for the compact chassis.
16GB DDR4 memory and a 500GB NVMe SSD
The system has 16GB of DDR4 3200MHz memory, fitted as two 8GB modules so it runs in dual channel. The motherboard has two DIMM slots and supports up to 64GB, but both slots are occupied in this build, so a future memory upgrade would mean replacing the existing modules.
Storage is a 500GB WD Blue SN580 NVMe SSD for Windows and your applications. It is a PCIe 4.0 drive, but the M.2 slot on the H610M-S2H V3 board is PCIe 3.0 x4, so the drive runs at PCIe 3.0 speeds, up to roughly 3,500MB/s. That is still a fast NVMe drive for start-up and application loading. The four SATA 6Gb/s ports are unused and the case has mounts for one 3.5in and one 2.5in drive, which leaves room for extra storage later. There is no optical drive.
Integrated graphics and display outputs
Graphics come from the processor, and the motherboard provides four video outputs: 1 x D-Sub, 2 x DisplayPort 1.2 and 1 x HDMI 2.1. That suits modern monitors as well as older VGA displays still found in many offices. The board has one PCIe 4.0 x16 slot and one PCIe 3.0 x1 slot, but this PC is specified around its integrated graphics rather than a dedicated graphics card.
Avance L8B ultra small form factor chassis
The Avance L8B is a solid steel, screwless ultra small form factor chassis measuring 310mm deep, 97mm wide and 280mm high. It takes up little desk space and suits reception desks, back offices and shared workstations. Power comes from a CWT 250W Flex ATX power supply, and the processor is air-cooled, with no liquid cooling fitted.
Connectivity and ports
At the rear there are 2 x Type-A 5Gbps USB ports, 4 x USB 2.0 ports and a 1GbE RJ-45 Ethernet port, with 2 x USB 2.0 ports on the front of the case. Wired networking uses a Realtek 1GbE LAN. There is no built-in Wi-Fi, so this PC connects to your network by Ethernet cable. Audio is Realtek 7.1 HD Audio. No keyboard or mouse is included.
Windows 11 Professional for business use
The operating system is Microsoft Windows 11 Professional, supplied genuine and pre-installed. Compared with Home, it adds BitLocker drive encryption, Remote Desktop and the ability to join a work domain, which matter for business users managing several machines.
Fixed specification, no customisation
This is a pre-built, stock system, so it cannot be customised. The processor, memory, storage and operating system are fixed, and what is described on this page is what ships. Quote part code PDT-708-005 if you call us on 0151 317 9860. If you want a different specification, there is a made-to-order range where every part can be chosen.
Ideal for
- Home offices and small businesses that need a working desktop quickly
- Replacing an ageing office PC with a Windows 11 Professional system
- Reception desks, back offices and shared workstations with limited space
- Everyday documents, spreadsheets, email, web apps and video calls
For anyone searching for an i5-12400 small form factor office PC that can arrive the next day, the Punch SFF combines a six-core processor, 16GB of memory, fast NVMe storage and Windows 11 Professional in a very compact chassis. It is a fixed specification PC with no customisation, which keeps it simple to order and quick to deliver.
Built and tested in the UK by Punch Technology, this pre-built system is in stock for next-day delivery to UK mainland addresses and comes with a 3-year parts and labour warranty, backed by over 30 years of PC building experience. Part code PDT-708-005.
Full Specification
| Processor | |
| CPU | Intel Core i5-12400 2.5/4.4GHz 6 Core, 12 Thread CPU (LGA1700) |
| Cores / Threads | 6 Cores / 12 Threads |
| Frequency | Base 2.5GHz / Max Turbo 4.4GHz |
| Cache | 18MB L3 |
| Integrated Graphics | Intel UHD Graphics 730 |
| CPU Cooler | Arctic Alpine 17 LP Low-Profile CPU Air Cooler (95W) (low-profile air cooler, 55 mm) |
| Memory & Storage | |
| RAM | 16GB DDR4 3200MHz |
| Configuration | Dual Channel – 2 x 8GB |
| Max Supported | 64 GB (2 x DIMM slots, 2 used) |
| Primary SSD | 500GB WD Blue SN580 PCIe 4.0 NVMe SSD (4000MB/R, 3600MB/W) – operating system and applications |
| Optical Drive | None |
| Graphics & Display | |
| GPU | Integrated – Intel UHD Graphics 730 |
| Display Outputs | 1 x D-Sub, 2 x DisplayPort 1.2, 1 x HDMI 2.1 on the motherboard |
| Motherboard & Connectivity | |
| Motherboard | Gigabyte H610M-S2H V3 Micro-ATX DDR4 Motherboard (mATX) |
| Chipset | Intel H610 Express |
| Wired Networking | 1GbE (Realtek) LAN |
| Wireless | None (wired network only) |
| Audio | High Definition Audio 7.1 (Realtek 7.1 HD Audio) |
| Rear & Front I/O (Input/Output) | |
| Rear Ports | 2 x Type-A 5Gbps, 4 x Type-A USB 2.0, 1 x RJ-45 1GbE Ethernet Port |
| Front Ports | 2 x USB 2.0 |
| Motherboard Video | 1 x D-Sub, 2 x DisplayPort 1.2, 1 x HDMI 2.1 |
| Expansion & Internal Slots | |
| PCIe Slots | 1 x PCIe 4.0 x16, 1 x PCIe 3.0 x1 |
| Storage Expansion | 1 x M.2 (PCIe 3.0 x4; 1 used, 0 free), 4 x SATA 6Gb/s (0 used), case mounts for 1 x 3.5" and 1 x 2.5" drives |
| Power, Case & Cooling | |
| Power Supply | CWT 250W Flex ATX PSU (Not certified (~85% at 50% load), Non-modular) |
| Chassis | Avance L8B Ultra Small Form Factor Chassis, 2x USB 2.0 (Ultra small form factor, Solid steel (screwless)) |
| Fans | None (pre-installed) |
| Liquid Cooling | None (air-cooled – Arctic Alpine 17 LP Low-Profile CPU Air Cooler (95W)) |
| Dimensions | 310mm (D) x 97mm (W) x 280mm (H) |
| Software & Support | |
| Part Code | PDT-708-005 (pre-built, in stock) |
| Operating System | Microsoft Windows® 11 Professional (Standard licence) (genuine, pre-installed) |
| Input Devices | No keyboard or mouse included |
| Warranty Cover | 3 Years, Parts & Labour |
| First Year | Free returns on warranty claims |
What is the Punch SFF i5-12400 best for?
The Punch SFF i5-12400 is primarily a compact office desktop for documents, spreadsheets, email, web-based tools and video calls. Six cores and twelve threads keep several of these running together without trouble, and the four video outputs on the motherboard allow more than one display to be connected.
It suits business software, browser-based systems and remote access, with Windows 11 Professional providing BitLocker, Remote Desktop and domain join. The integrated graphics mean it is not intended for 3D rendering, video editing or other graphics-intensive work. Buyers who want a different specification, a dedicated graphics card or built-in Wi-Fi should look at the made-to-order PC range, where every part can be configured and the estimated lead time is shown when you order.
Where does the Punch SFF i5-12400 sit in the range?
Among the nearby systems in the Next Day and Express range, this is the entry step. Moving up, the Next Day PC | Punch SFF, L12, i7-12700 keeps the same 16GB and 500GB storage but steps up to an Intel Core i7-12700 with 12 cores for heavier multitasking. The Punch GDT, R7 5700G 16GB 1TB Win 11 is an AMD alternative with an 8-core Ryzen 7 5700G, Radeon graphics onboard and 16GB of memory.
Frequently Asked Questions
What software can the Punch SFF i5-12400 run?
It runs everyday business software well, including office suites, web browsers, email clients, accounting packages and video conferencing tools under Windows 11 Professional. The six-core processor and 16GB of memory handle several of these at once. Because graphics are integrated, it is not designed for 3D modelling, rendering or video editing.
Can I customise the Punch SFF i5-12400?
No, this is a fixed specification PC with no customisation. It is pre-built and held in stock, so the processor, memory, storage and operating system are exactly as described on this page. If you want to choose your own parts, the made-to-order range lets you configure a system, with the estimated lead time shown when you order.
Does the Punch SFF i5-12400 have Wi-Fi?
No, it has no built-in Wi-Fi and connects through its 1GbE Ethernet port, so it needs a network cable. Wireless cannot be added to the pre-built specification we supply. If built-in wireless is essential, a made-to-order PC lets you choose a configuration that includes it.
Why does this PC come with Windows 11 Professional?
Windows 11 Professional adds features that business users rely on and Windows 11 Home lacks. These include BitLocker drive encryption, Remote Desktop and the ability to join a work domain. It is supplied genuine and pre-installed.
Who is this PC best suited for?
It is best suited to home office users, small businesses and office managers who need a compact Windows 11 Professional desktop quickly. It also suits anyone replacing an older office PC where desk space is limited. It is less suited to buyers who need a dedicated graphics card or a specification they can choose themselves.
Can I add more memory or storage to the Punch SFF i5-12400?
The motherboard supports up to 64GB of memory, but both of its two DIMM slots are used by the 2 x 8GB kit, so more memory means replacing those modules. For storage, the M.2 slot is occupied by the 500GB SSD, while four SATA 6Gb/s ports are unused and the case has mounts for one 3.5in and one 2.5in drive.
