Quick Answer
Ignore power supply claims that do not change stability, comfort or upgrade room for engineering simulations. Focus on the spec floor, named component quality, warranty support and whether the part works cleanly with the rest of the PC.
The Practical Spec Floor
Quality 650 W units often start around R1,100-R1,800; 750-850 W Gold units around R1,800-R3,200. Use Corsair RM750e, MSI MAG A750GL PCIE5 and Seasonic Focus GX-750 as comparison points, then remove anything that does not solve engineering simulations. For sustained CPU load and large files, cooling and reliability beat one-off peak speed.
Compatibility Checks That Matter
Prioritise 80 Plus Gold, DC-to-DC design, a strong 12 V rail, protections and ATX 3.0 or 3.1 support. Use the current PC, monitor, desk and room as hard limits. Leave one upgrade margin for the next likely GPU, SSD, wheel base, capture card or larger monitor, not three speculative upgrades.
Where The Money Is Usually Lost
A weak PSU costs money through instability, cable limits, fan noise or a second purchase. RTX 4060-class systems are often fine on 650 W; RTX 4070 Super or stronger builds are better with 750-850 W Gold and native GPU power connectors. Spend the next R500-R1,500 only when it buys lower noise, more capacity, better connectors, stronger cooling or longer warranty cover.
FAQ
What is the safe budget for power supplies in SA?
Use the price band above as a planning guide, not a live price promise. Check the current Evetech listing for warranty, included accessories and delivery timing before deciding.
Which spec should I check first for engineering simulations?
Start with the blocker: wattage for PSUs, capacity for SSDs, clearance for cases, refresh rate for monitors, or platform support for CPUs and motherboards. For sustained CPU load and large files, that first blocker matters more than styling.
When is the premium option worth paying for?
Pay more when the premium power supply gives lower noise, better cooling, more storage, stronger power delivery, higher refresh or a longer warranty. Skip it when it only adds lighting, branding or a headline number with no daily benefit.