ROG LOKI SFX-L 850W Platinum
The ASUS ROG LOKI SFX-L 850W Platinum is a 850W SFX-L power supply rated 80+ Platinum, fully modular, with 16 12V-2x6 connectors for modern graphics cards. Independent lab testing puts it at A for noise, meaning quiet under load. Full specs, quality score and current prices are below.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
Quality score
How we score →A power supply has no performance benchmark: every 850W unit delivers 850W. This scores how well built and how liveable the ROG LOKI SFX-L 850W Platinum is, out of 100, from six published factors.
Better always scores higher, but the steps are uneven on purpose: Bronze to Gold is worth 11 of the 25 efficiency points, Gold to Titanium only 6. A factor we hold no value for scores zero rather than being skipped, so a unit we know little about never outranks a fully specified one. That does mean a zero can mean either poor or unknown, which is what the confidence figure above is for. Physical size scores nothing: SFX-L is a fit decision, not a quality one.
Other wattages in this range
The same ROG LOKI SFX-L Platinum platform at a different rating. A larger unit runs a smaller load perfectly well, so buy for the card you plan to fit.
Specifications
Output & Rating
- Continuous power
- 850 W
- Efficiency
- 80+ Platinum
- ATX 12V standard
- ATX 3.1
- Price per watt
- $0.291/W
Connectors
- Motherboard
- 20+4-pin
- CPU (EPS)
- 2 (4+4)
- PCIe
- 3 (8)
- 12V-2x6 / 12VHPWR
- 16
- SATA
- 6
- Molex (4-pin)
- 4
Physical
- Form factor
- SFX-L
- Depth
- 125 mm
- Modularity
- Fully modular
- Cable colour
- black
- Colour
- black, silver
- RGB
- Yes
Measured Noise
- Cybenetics grade
- A
- What that means
- quiet under load
Platform
- Built by
- Great Wall
Electrical & Warranty
- Protections
- OPP, OVP, UVP, SCP, OCP, OTP
- Input voltage
- 100-240 V
- Warranty
- 10 years
Compare the ROG LOKI SFX-L 850W Platinum against every other unit on the power supply comparison table. Not sure how much wattage you need? The power supply guide works through the sizing.
Where to buy the ROG LOKI SFX-L 850W Platinum
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Amazon | In stock | $247.57 |  |
The ROG LOKI SFX-L 850W Platinum starts from $247.57 across 1 retailer, which works out at $0.291/W. Prices update daily from live stock.
What the ROG LOKI SFX-L 850W Platinum can power
Compare all GPUs →The graphics cards this 850W unit meets the system requirement for, ranked fastest first at 4K, with the margin left over. The resolution follows the wattage, because a unit this size is bought for a card that will be run at 4K. Headroom is measured against the card maker’s own whole-system recommendation, so 0 W means it meets that recommendation exactly rather than falling short.
| Graphics card | Card draw | PSU advised | Headroom |
|---|---|---|---|
| GeForce RTX 4090 Nvidia | 450 W | 850 W | +0 W |
| GeForce RTX 5080 Nvidia | 360 W | 850 W | +0 W |
| GeForce RTX 4080 Super Nvidia | 320 W | 750 W | +100 W |
| Radeon RX 7900 XTX AMD | 355 W | 800 W | +50 W |
| GeForce RTX 5070 Ti Nvidia | 300 W | 750 W | +100 W |
| Radeon RX 9070 XT AMD | 304 W | 750 W | +100 W |
| GeForce RTX 4080 Nvidia | 320 W | 750 W | +100 W |
| Radeon RX 7900 XT AMD | 300 W | 750 W | +100 W |
Affiliate disclosure: Some links on this page are affiliate links — MaxMyBuild may earn a commission at no extra cost to you if you buy through them. As an Amazon Associate, MaxMyBuild earns from qualifying purchases. For Amazon, current price and availability are shown on the Amazon product page; product prices and availability are accurate as of the date and time of purchase and are subject to change. Prices shown for other retailers are approximate and may differ at checkout. “Search” links are non-affiliate and provided for convenience only.