Gaming Mini PC: What Radeon 780M, RAM and OCuLink Really Do – Buying Guide 2026

A mini PC fits behind your monitor or next to the TV and uses little power. Many models are now sold as "gaming mini PCs". There is no graphics card inside them, though, just a processor with built-in graphics. Whether that is enough depends on what you play.

This guide covers which graphics the popular AMD models use, why memory matters so much in a mini PC, what OCuLink does, and five devices available on amazon.de.

Transparency: We have not tested these mini PCs ourselves. All information comes from AMD, the manufacturers (Minisforum, Beelink, GMKtec), the game developers and the verified amazon.de product pages (as of October 2026). We don't list prices because they change constantly.

Who is a gaming mini PC for?

A mini PC with integrated graphics does not replace a computer with a dedicated graphics card. It is a good fit if you

• mostly play esports titles and older or less demanding games,
• are short on space or want a quiet PC for the living room,
• also use the PC for office work, streaming apps and multitasking.

For reference, here are the official minimum requirements of two big ranked games: Riot lists an Intel HD 4000 (for 30 FPS) and 4 GB of RAM as the minimum for Valorant. Valve requires at least 8 GB of RAM, a DirectX 11 graphics chip with 1 GB of memory and 85 GB of free storage for Counter-Strike 2. The mini PCs below clear these bars easily. How many FPS you get depends on the game, resolution and settings, so we don't give fixed numbers.

If you want to play new AAA games on high settings, a desktop with a graphics card or a gaming laptop is the better choice. Or you upgrade later via OCuLink (see below).

Radeon 760M or 780M: the key difference

Almost all popular gaming mini PCs use AMD Ryzen 7000 and 8000 series processors. According to AMD, the main difference is the graphics:

The Radeon 780M has 12 graphics cores, the 760M only 8. For gaming, this is the difference to look at first. The gap between the 8745HS and the 8845HS is small: Beelink describes the 8745HS as an 8845HS without the AI unit (NPU). AMD lists an NPU with up to 16 TOPS for the 8845HS, which plays no role in games.

According to AMD, all three processors run at a default TDP of 35 to 54 W. Many mini PC makers run them at higher power, for example GMKtec with up to 65 W in performance mode. Good cooling matters even more in such small cases.

Why memory matters so much

Integrated graphics have no video memory of their own. AMD explains that they share part of the system memory with the processor (Unified Memory Architecture). Two tips follow from that:

• Two RAM sticks instead of one. According to AMD, these processors have two memory channels. Both only work when two sticks are installed. Make sure the RAM comes as 2 × 8 GB or 2 × 16 GB, not as a single stick.
• Enough RAM. Because the graphics use it too, 16 GB is the minimum and 32 GB gives more headroom. More on memory in our RAM guide.

In the BIOS, the part reserved for graphics is usually called UMA Frame Buffer Size. AMD recommends leaving it on "Auto". Only if a game complains about too little video memory or textures are missing does AMD suggest 1 or 2 GB, on systems with 8 GB of RAM or more.

OCuLink: add a graphics card later

Some mini PCs have an OCuLink port. It lets you connect an external graphics card. Minisforum and GMKtec specify a PCIe 4.0 x4 link. You also need:

• an OCuLink dock for the graphics card,
• a separate power supply for the dock,
• the graphics card itself.

Important: both manufacturers state that the OCuLink port does not support hot-plugging. Only plug or unplug the cable while the PC is switched off. On the Minisforum UM880 Plus, OCuLink is added through an adapter board in an M.2 slot. That slot is then no longer available for a second SSD.

Ports and monitors

All five models below have HDMI 2.1, DisplayPort and USB4 and, according to the manufacturers, can drive at least three displays at once. For a high refresh rate monitor, check the specs per port: Minisforum lists 4K at 120 Hz for the DisplayPort 1.4 on its Slim models, and 4K at 240 Hz with DSC compression. HDMI 2.1 needs a matching cable, see our HDMI 2.1 cable guide. For the screen itself, see the gaming monitor buying guide.

For online games, a LAN cable is more stable than Wi-Fi. All models have at least one 2.5 Gbit LAN port.

Five example models

The following mini PCs were in stock on amazon.de when we checked, shipped by Amazon and sold by third-party sellers (October 2026). They are not test winners but examples for different needs. Specs come from the manufacturers and the amazon.de product pages.

Example model

Entry level: MINISFORUM UM760 Slim

Ryzen 5 7640HS with 6 cores and Radeon 760M (8 graphics cores). This configuration has 16 GB DDR5 and a 1 TB SSD. Two M.2 slots (PCIe 4.0) for SSDs, HDMI 2.1, DisplayPort 1.4, USB4 and 2.5 Gbit LAN. According to Minisforum, the case measures 130 × 126.5 × 50.4 mm and weighs 0.67 kg.

Processor

AMD Ryzen 5 7640HS (6/12)

Graphics

Radeon 760M

Configuration

16 GB DDR5, 1 TB SSD

Power supply

120 W

A good fit if you mainly play esports titles and want the smallest budget on this list.

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Example model

Same case, stronger graphics: MINISFORUM UM870 Slim

The same case as the UM760 Slim, here with a Ryzen 7 8745H with 8 cores and Radeon 780M. Configuration: 16 GB DDR5 and a 512 GB SSD. According to Minisforum, it runs at 54 W in balanced and 65 W in performance mode, plus Wi-Fi 6E.

Processor

AMD Ryzen 7 8745H (8/16)

Graphics

Radeon 780M

Configuration

16 GB DDR5, 512 GB SSD

Size

130 × 126.5 × 50.4 mm

A good fit if you want the 780M but don't need OCuLink.

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Example model

32 GB out of the box: Beelink SER8

Ryzen 7 8745HS with Radeon 780M, 32 GB DDR5-5600 and a 500 GB SSD. Beelink lists vapor chamber cooling and 65 W operation. According to the manufacturer, the USB4 port supports Thunderbolt 3, power delivery and video output. Size according to Beelink: 135 × 135 × 44.7 mm, weight 0.75 kg. The listing mentions a 3-year warranty.

Processor

AMD Ryzen 7 8745HS (8/16)

Graphics

Radeon 780M

Configuration

32 GB DDR5, 500 GB SSD

Network

2.5 Gbit LAN, Wi-Fi 6

A good fit if you want enough RAM for graphics and multitasking right away.

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Example model

With OCuLink: MINISFORUM UM880 Plus

Ryzen 7 8845HS with Radeon 780M, 16 GB DDR5 and a 512 GB SSD. The OCuLink port (PCIe 4.0 x4) is set up through an M.2 adapter board. It also has 2.5 Gbit LAN, HDMI 2.1, DisplayPort 1.4 and USB4. Power supply according to Minisforum: 120 W.

Processor

AMD Ryzen 7 8845HS (8/16)

Graphics

Radeon 780M

Configuration

16 GB DDR5, 512 GB SSD

Expansion

OCuLink via M.2 adapter

A good fit if you want to connect a graphics card via a dock later.

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Example model

Lots of ports: GMKtec NucBox K8 Plus

Ryzen 7 8845HS with Radeon 780M, 32 GB DDR5 and a 512 GB SSD. OCuLink (PCIe 4.0 x4) is built into the front. Plus two 2.5 Gbit LAN ports, two USB4 ports, HDMI 2.1 and DisplayPort 2.1 for up to four displays. According to the listing, there are three power modes: 35 W, 54 W and 65 W. Size according to GMKtec: 132 × 125 × 58 mm.

Processor

AMD Ryzen 7 8845HS (8/16)

Graphics

Radeon 780M

Configuration

32 GB DDR5, 512 GB SSD

Expansion

OCuLink, 2 × USB4

A good fit if you want OCuLink and 32 GB of RAM in one device.

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The models compared

Model	Graphics	RAM included	SSD	OCuLink	Best for
MINISFORUM UM760 Slim	Radeon 760M	16 GB	1 TB	no	entry level, esports
MINISFORUM UM870 Slim	Radeon 780M	16 GB	512 GB	no	780M in a small case
Beelink SER8	Radeon 780M	32 GB	500 GB	no	lots of RAM included
MINISFORUM UM880 Plus	Radeon 780M	16 GB	512 GB	yes, via adapter	eGPU later
GMKtec K8 Plus	Radeon 780M	32 GB	512 GB	yes	eGPU + many ports

Checklist before you buy

• Does it have a Radeon 780M if gaming matters?
• Is the RAM installed as two sticks, and is it at least 16 GB?
• Do you need OCuLink to add a graphics card later?
• Is the SSD big enough for your games? CS2 alone needs 85 GB according to Steam. More in the SSD guide.
• Do you have a LAN cable for ranked matches? See our Ethernet cable guide.

FAQ

Can I play Valorant and CS2 on a mini PC?

The models above meet the official minimum requirements of both games. How smoothly they run depends on resolution and graphics settings. There are no official FPS figures, so we don't give any.

Is the Radeon 780M as fast as a graphics card?

No, not as fast as a current mid-range card. In its own product description, GMKtec compares the 780M to an NVIDIA GTX 1650 Ti. That is a manufacturer claim, not an independent test.

Can I upgrade the RAM later?

Yes on all five models above, they have two SO-DIMM slots for DDR5. Some mini PCs have soldered LPDDR5 memory that cannot be upgraded. Check the spec sheet before you buy.

What do I need for an external graphics card via OCuLink?

An OCuLink dock, a power supply for it and the graphics card. The PC must be off when you plug or unplug it, because according to Minisforum and GMKtec, OCuLink does not support hot-plugging.

How do I set more video memory?

In the BIOS via "UMA Frame Buffer Size", if your device offers the option. AMD recommends "Auto" and only 1 to 2 GB if problems occur, with at least 8 GB of RAM installed.

Sources

As of October 2026. Product specs come from the manufacturer pages and the verified amazon.de product pages.

• AMD – Ryzen 7 8845HS specifications
• AMD – Ryzen 7 8745HS specifications
• AMD – Ryzen 5 7640HS specifications
• AMD – Setting the UMA frame buffer size for integrated graphics
• Riot Games – Valorant minimum and recommended PC specs
• Steam – Counter-Strike 2 system requirements
• Minisforum – UM880 Plus
• Minisforum – UM870 Slim
• Beelink – SER8 8745HS
• GMKtec – NucBox K8 Plus