1000W PSU buying guide for Kempton Park residents

Quick Answer

Kempton Park builders running RTX 4080, RTX 4090, or RX 7900 XTX builds need a 1000W PSU to keep system power draw under 80% of rated capacity. Evetech stocks 80+ Gold and Platinum 1000W units from R2,200, with ATX 3.1-compliant models featuring native 12V-2x6 connectors recommended for current and next-gen GPUs.

Wattage Calculation for a 1000W Build

Before buying, estimate your build's peak wattage: an RTX 4090 draws ~450 W, a Ryzen 9 7950X draws ~170 W at full load, plus 50–80 W for fans, drives, and RGB. Total: ~680–700 W. A 1000W PSU puts that at 68–70% load — ideal. The 80+ Gold efficiency band peaks at 50–75% load, so you get maximum energy efficiency in normal gaming scenarios. Never target 100% load capacity; it stresses the PSU and voids some warranties.

Choosing Between 80+ Gold and Platinum at 1000W

80+ Gold units convert 87–92% of mains power to 12V DC usable by components. 80+ Platinum steps this to 90–94%. The real-world difference for a Kempton Park gamer running 6 hours daily amounts to roughly R150–R250 saved per year on electricity at SA Eskom tariff rates. Gold is the value pick; Platinum makes sense for 24/7 systems or users wanting the lowest possible heat output.

Cable Types: What Comes in the Box

A 1000W ATX 3.1 PSU should include: 24-pin ATX motherboard cable, 2× 8-pin EPS CPU cables (needed for high-core-count CPUs), 2× 12V-2x6 PCIe cables for dual-GPU or future GPU use, and SATA/Molex for storage and fans. Confirm your GPU's cable requirements — RTX 4090 uses a single 16-pin 12V-2x6; most other cards use one or two 8-pin PCIe connectors.

FAQ

What 1000W PSU brands are worth buying in SA?

Corsair RM1000x (80+ Gold, 10-year warranty), Seasonic Focus GX-1000 (80+ Gold, 10-year warranty), and MSI MEG Ai1000P (80+ Platinum, ATX 3.1) are well-regarded at Evetech. All ship with full modular cabling and include native PCIe Gen 5 power connectors for current GPUs.

Will a 1000W PSU fit in my existing ATX case?

Standard ATX PSUs measure 150 × 86 mm in cross-section. Length varies from 140 to 200 mm — a critical measurement for cases with a dedicated PSU bay. Measure your case's PSU bay depth before ordering, especially for high-capacity units that trend longer.

How do I know if my current PSU is underpowered?

Symptoms of an underpowered PSU include random restarts or shutdowns during GPU-intensive scenes, USB devices disconnecting, and system-wide instability that clears when you run lower GPU power limits. A PSU test with HWInfo64 showing 12V rail sag below 11.8 V under load confirms the issue.