Guides

Practical, worked-through answers to common PC-building power questions. Each guide shows the math, says who it fits and who should size differently, and links to the tool that produced the numbers.

What PSU Do You Need for an RTX 5070?

Worked PSU sizing for the NVIDIA GeForce RTX 5070: estimated system load with a modern CPU, recommended wattage tiers, and when 650W vs 750W makes sense.

Last updated: 2026-07-07

Is 750W Enough for an RTX 5070 Ti + Ryzen 7 9800X3D?

Load math for the RTX 5070 Ti + Ryzen 7 9800X3D combo: estimated draw, why 750W is the comfortable tier, and when 850W is worth it.

Last updated: 2026-07-07

What PSU Do You Need for an RX 9070 XT?

PSU sizing for the AMD Radeon RX 9070 XT: worked load estimates with heavy and light CPUs, connector notes for partner cards, and the 650W vs 750W decision.

Last updated: 2026-07-07

What PSU Do You Need for an RTX 4070 + Ryzen 5 7600?

PSU sizing for the popular RTX 4070 + Ryzen 5 7600 pairing: real load math, why a quality 550W unit is enough, and why NVIDIA's 650W guidance is more conservative.

Last updated: 2026-07-07

How Much PSU Headroom Do You Actually Need?

Why PSU calculators add 25-45% on top of estimated load: transient spikes, efficiency and noise sweet spots, capacitor aging, and upgrade room — with worked numbers.

Last updated: 2026-07-07

Planned guides

These topics are on our backlog. We will write them in the order that real search demand (via Google Search Console) suggests, rather than publishing thin pages all at once.

650W vs 750W PSU: Which Tier Should You Buy?
ATX 3.0 vs ATX 3.1: What Actually Changed?
12VHPWR vs 12V-2x6: Differences and Safety Notes
Do You Need an ATX 3.x PSU for RTX 50-Series Cards?
What PSU Do You Need for an RTX 5080?
What PSU Do You Need for an RTX 5090?
What PSU Do You Need for an RX 9070?
Is 850W Enough for an RTX 5080?
27" vs 32" for 4K: PPI and Viewing Distance Compared
The Best Monitor Size for 1440p: PPI Math
How Far Should You Sit from a 4K Monitor?
Is 1080p Still OK on a 27" Monitor?