The Seasonic Vertex GX-1200 offers high build quality, good performance, silent operation, and ATX v3.0 and PCIe 5.0 compatibility. How it fares though, against competiting offerings? Read the full review to find out.
The Seasonic Vertex GX-1200 is included in my best ATX v3.0 & PCIe 5.0 PSU picks article.
The Seasonic Vertex GX line includes four members with capacities ranging from 750W to 1200W. All models of the line are ATX v3.0 and PCIe 5.0 ready and are supported by an extended, ten-year warranty. Seasonic has a solid reputation in the PSU market, and the Vertex line addresses the mid-segment, with the Prime models on top of them and the Focus models below. The Vertex GX-1200, which I will evaluate in this review, is a strong unit capable of handling an RTX 4090 paired with a power-hungry CPU, like the Intel i9-13900K(s). Given that the RTX 4090 can exceed 600W in power spikes and 600W in sustained power, and the 13900K is close to 370W sustained at stock speeds, it is better to have a 1200W PSU for such a combination to have enough room.
With 160mm depth, this is a compact PSU, given its capacity, so you won’t have any compatibility issues with standard ATX chassis. Thankfully the PSU’s casing is large enough to accommodate a 135mm fan, which utilizes a fluid dynamic bearing for increased reliability and lower noise output.
|Total Max. Power (W)||1200|