Today I’m building out my all-white mATX PC in the new NZXT H3 Flow, and I walk you through the full process—from prepping the motherboard outside the case (always my move) to getting everything wired, lit up, and finally booted. The core of this build is the AMD Ryzen 9800X3D paired with a clean white mATX board, Corsair Vengeance DDR5, and a 2TB Samsung 9100 Pro NVMe. For cooling, I went with the NZXT Kraken Plus 240 because this case is top-mounted 240 territory, and I leaned hard into Lian Li for the PSU and those Infinity wireless fans because… yeah, they just look drop dead gorgeous in an all-white setup. After about two weeks of gaming (I was literally testing during the Battlefield 6 beta), I came back with an honest after report. I was worried about two things: temps in a smaller case, and the jump from my 3080 Ti to the RTX 5070 Ti. In real-world 4K gaming, I’m seeing roughly a 15–18% boost, and with DLSS 4 the games look incredible. Thermals were a pleasant surprise too—the H3 Flow’s airflow-focused design kept my CPU around 60–70°C and my GPU topping out around ~70°C, which is exactly what I wanted from a compact “mid tier” 4K monster.