Small form factor PC

2024-04-26

I built a small form factor PC. The build is based on the Minisforum BD790i which has an AMD Ryzen 9 7945HX. This CPU is physically identical to the desktop 7950X, but has lower power and slightly lower clock rate, meaning it draws about half the power while delivering 90% of the performance.

Finished build.

FIGURE 1 Finished build.

EXIF data
Camera
FUJIFILM GFX100S
Lens
125
Aperture
f/NaN
Shutter
1.0 s
ISO
ISO 100
Software
Digital Camera GFX100S Ver2.11
Date
Download
Parts used (except the LEGO Porsche and the purple puppy)

FIGURE 2 Parts used (except the LEGO Porsche and the purple puppy)

EXIF data
Camera
FUJIFILM GFX100S
Lens
GF55mmF1.7 R WR
Aperture
f/4.0
Shutter
1/42 s
ISO
ISO 800
Software
Digital Camera GFX100S Ver2.11
Date
Download
ComponentName
Motherboard + CPUMinisforum BD790i (AMD Ryzen 9 7945HX)
GPUAsus ProArt Nvidia GeForce RTX 4080 Super
SSDCrucial P3 Plus 4 TB
RAMCrucial RAM 96 GB (2 x 48 GB) SODIMM
PSUCorsair SF750
CaseKXRORS S300
FanThermalright TL-B12 Extrem
PCIe RiserSome random one (Jectse on Amazon) 200 mm dual reverse PCIE 4.0
12VHPWR cableAnother random one (JOYJOM on Amazon)
Table 1 List of parts.

Putting it together was pretty smooth. The GPU just barely fits if I force it in. Otherwise, I’d have to remove one of the panels of the case, which is slightly more work.

The 120mm x 25mm Thermalright fan fits perfectly (i.e. barely) in the case. It’s also loud since it goes up to 3000 rpm so I had to change the fan settings in BIOS (which doesn’t let me do a detailed fan curve). For any given RPM, it is quiet compared to the competition (roughly the same as the Arctic P12 Max and Noctua A12x25 according to some reviews).

Finished build left side.

FIGURE 3 Finished build left side.

EXIF data
Camera
FUJIFILM GFX100S
Lens
125
Aperture
f/NaN
Shutter
1.3 s
ISO
ISO 100
Software
Digital Camera GFX100S Ver2.11
Date
Download
Left side inside. Look at the tight fit for the GPU.

FIGURE 4 Left side inside. Look at the tight fit for the GPU.

EXIF data
Camera
FUJIFILM GFX100S
Lens
125
Aperture
f/NaN
Shutter
1.3 s
ISO
ISO 100
Software
Digital Camera GFX100S Ver2.11
Date
Download
Right side inside.

FIGURE 5 Right side inside.

EXIF data
Camera
FUJIFILM GFX100S
Lens
125
Aperture
f/NaN
Shutter
3.2 s
ISO
ISO 100
Software
Digital Camera GFX100S Ver2.11
Date
Download
Right side outside.

FIGURE 6 Right side outside.

EXIF data
Camera
FUJIFILM GFX100S
Lens
125
Aperture
f/NaN
Shutter
3.2 s
ISO
ISO 100
Software
Digital Camera GFX100S Ver2.11
Date
Download
Neofetch

FIGURE 7 Neofetch

Download

It works pretty well. The temps are about 90 degrees C for the CPU when all cores are under maximum load (compiling C++). Framerates are great on Helldivers 2.