# What is the most efficient gaming power supply available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What is the most efficient gaming power supply available?

## Products

### Seasonic PRIME TX-1300
```yaml
product: seasonic-prime-tx-1300
brand: Seasonic
price_gbp: 292.89
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
fanless: false
wattage: 1300W
efficiency: 80 PLUS Titanium, up to 94% at 50% load
modularity: Fully modular
voltage_regulation: Under 0.5%
number_of_pcie_connectors: 7
```

- **Price:** £292.89 [^1]
- **Summary:** The Seasonic PRIME TX-1300 is a 1300W fully modular power supply with 80 PLUS Titanium efficiency and very tight voltage regulation. Its hybrid fan control enables silent fanless operation at low loads, making it suitable for high-end gaming PCs, multi-GPU systems, and workstations.
- **Ideal For:** It suits the search for the most efficient gaming power supply because its 80 PLUS Titanium certification delivers up to 94% efficiency at 50% load, while fully modular cabling, hybrid fanless operation, and under 0.5% voltage regulation support high-end gaming systems.
- **Additional Sources:** [^2]

### be quiet! Dark Power 13 1300W
```yaml
product: be-quiet-dark-power-13-1300w
brand: be quiet!
price_gbp: 229.87
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
fanless: false
wattage: 1300 W
efficiency: 80 PLUS Titanium up to 94.4%
modularity: Full Modular
voltage_regulation: Digital regulation
number_of_pcie_connectors: 6
```

- **Price:** £229.87 [^3]
- **Summary:** This 1300 W power supply has 80 PLUS Titanium efficiency, full modular cabling, six PCIe 6+2-pin connectors, and digital control for stable power delivery. It suits high-end gaming PCs, multi-GPU systems, and demanding overclocked builds that need substantial, quiet power.
- **Ideal For:** It suits the search for the most efficient gaming power supply because its 80 PLUS Titanium certification reaches up to 94.4% efficiency, reducing wasted power and heat while providing 1300 W for high-end gaming hardware.
- **Additional Sources:** [^4]

### Lian Li RS1200G
```yaml
product: lian-li-rs1200g
brand: Lian Li
price_gbp: 2444951.51
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
fanless: true
wattage: 1200W
efficiency: 80 PLUS Gold / Cybenetics Platinum / PPLP Gold
modularity: Full-Modular
voltage_regulation: 11.92V-12.03V on 12V rail
number_of_pcie_connectors: 6
```

- **Price:** £2444951.51 [^5]
- **Summary:** The Lian Li RS1200G is a 1200W ATX 3.1 power supply with full-modular cabling, native 12V-2x6 support, and fanless operation at low loads. Its high efficiency and strong voltage regulation make it suitable for high-end gaming PCs with power-hungry CPUs and graphics cards.
- **Ideal For:** It suits users seeking an efficient gaming power supply because it combines 80 PLUS Gold and Cybenetics Platinum efficiency certifications with measured efficiency above 91% and a fanless low-load mode.

### SilverStone Extreme 1200R Platinum
```yaml
product: silverstone-extreme-1200r-platinum
brand: SilverStone
price_gbp: 318.8
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
fanless: false
wattage: 1200 W
efficiency: 80 Plus Platinum
modularity: Fully modular
voltage_regulation: Tight
number_of_pcie_connectors: 4
```

- **Price:** £318.8 [^6]
- **Summary:** The SilverStone Extreme 1200R Platinum is a compact, fully modular 1200 W SFX-L power supply with 80 Plus Platinum efficiency and ATX 3.1 compatibility. Its semi-fanless 120 mm fan, 12V-2x6 connector, and small form factor suit powerful small-form-factor gaming PCs.
- **Ideal For:** It suits the search for the most efficient gaming power supply because its 1200 W output carries an 80 Plus Platinum rating, reaches 91% efficiency, and uses semi-fanless cooling to reduce noise during low-load gaming.

---
## References & Sources
[^1]: Overclockers UK, accessed 2026-09-03. https://www.overclockers.co.uk/seasonic-prime-tx-3.0-1300w-atx-3.1-80-plus-titanium-power-supply-ca-08x-ss.html
[^2]: Newegg, accessed 2026-09-03. https://www.newegg.com/p/pl?d=seasonic+prime+tx-1300+1300w+80%2B+titanium
[^3]: Newegg, accessed 2026-09-03. https://www.newegg.com/p/1HU-004H-000S7
[^4]: Scan, accessed 2026-09-03. https://www.scan.co.uk/products/1300w-be-quiet!-dark-power-pro-13-fully-modular-pcie-5080plus-titanium260asilent-135mm-fdb-fanatx-30
[^5]: Tokopedia, accessed 2026-09-03. https://www.tokopedia.com/enterkomputer/lian-li-rs1200g-1200w-black-atx3-1-ready-rotational-shift-power-supply-80-gold-certified-with-cybenetics-platinum-power-supply-psu-1200-watt-80-gold-garansi-resmi-10-tahun-1733686777623119440
[^6]: Multitronic, accessed 2026-09-03. https://www.multitronic.fi/en/products/4620581/silverstone-extreme-1200r-platinum-1200w---psu--80-plus-platinum