PCIe 5.0 vs PCIe 4.0 for Video editing in 4k in SA
PCIe 5.0 vs PCIe 4.0 for video editing in 4k is mainly about fit, features, compatibility, cost, and upgrade path, not one automatic winner. SA buyers should match the choice to the setup.
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Yes, a 1200W PSU is the practical floor for a AAA single-player and AI workstation with two serious GPUs, but it is not always enough for dual flagship cards. Two RTX 4090 or RTX 5090-class GPUs can push the PSU choice toward 1600W, while dual RTX 4070 Ti Super or RTX 4080 Super builds can be comfortable on a premium 1200W ATX 3.1 unit. Expect quality 1200W-1600W units to sit in a broad R4,000-R9,000 SA band.
The power draw calculation
A single RTX 4090 can draw about 450W, and a high-end Ryzen 9 or Core i9 platform can add 170W-250W under heavy work. Two GPUs, drives, fans, USB devices, capture cards, and transient spikes can move a workstation past 1000W quickly. That is why Corsair HX1200i, Seasonic Vertex GX-1200, Super Flower Leadex Platinum, or a 1600W Platinum unit is a better shortlist than a generic high-watt label.
When 1200W is enough
For dual mid-high GPUs, 1200W works when the CPU is efficient, the case airflow is strong, and the PSU has the right native GPU cables. For dual flagship GPUs, 1200W becomes tight because noise, heat, and transient spikes reduce comfort. If the machine earns money through rendering, AI experiments, or client work, the extra Rand for 1600W can be cheaper than instability.
SA workstation checks
Check wall plug quality, case clearance, 12V-2x6 cable routing, motherboard slot spacing, and cooling before buying the PSU. In Johannesburg, Cape Town, Durban, and Pretoria, local warranty support matters because a workstation PSU is not a casual accessory. Also confirm whether the apps actually use two GPUs; many editing tasks prefer one fast GPU plus more RAM and SSD space.
FAQ
Is 1200W enough for two RTX 4090 cards?
It is marginal. A carefully tuned system may run, but 1600W is the safer target for sustained rendering, AI work, and quieter operation.
Do video editors need dual GPUs?
Not always. Many 1080p and 4K editing workflows benefit more from one strong GPU, 64GB-128GB RAM, and fast NVMe scratch storage.
What connector standard should I choose?
Use a modern ATX 3.0 or ATX 3.1 PSU with native GPU cables. Avoid adapter-heavy builds when two high-end cards are installed.
TIP
