Mini PC with Ryzen 7 7840HS processor and eGPU [Bericht]

A detailed test on the YouTube channel shows what the Geforce RTX 4090 can do as an eGPU via the Oculink interface (“OCuLink”) on a mini PC with an AMD Ryzen 7 7840HS (“Phoenix”) processor. Technology tabletswho have now taken a closer look at the latest Minisforum UM780 XTX for this project.

Geforce RTX 4090 at 63Gbps on Oculink

As the basis for the new Mini PC from Hong Kong-based manufacturer Minisforum, which bears the same name Microforum UM780 XTX, the crown prince of the Phoenix-H series is the AMD Ryzen 7 7840HS with eight Zen 4 processor cores and the AMD Radeon 780 with 768 RDNA-3 shaders, which play only a secondary role in the YouTube channel review. The main representative is the Nvidia Geforce RTX 4090, which is delivered via Oculink (“SFF-8612”) at 63Gbps and achieves around 32,500 points in 3DMark Time Spy.

Geforce RTX 4090 via Oculink as eGPU in 3DMark Time-Spy
Source: TechTablets


This means that the Geforce RTX 4090, acting as an eGPU, is only 11 percent behind the score achieved internally by the same model in a regular desktop PC in terms of graphics score achieved. The main reason for this is the Oculink interface, which provides the eGPU with much more bandwidth than solutions via USB4 and Thunderbolt, which typically lose about 20 to 25 percent. The mobile phone’s processor, which was increased from 54 to 70 W at the factory, also contributes to the good overall result.

The review also contains game benchmarks and provides an interesting insight into what graphics cards connected via Oculink can achieve as eGPUs.

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source: Technology tablets