ASUS ROG LOKI SFX-L 1200W Titanium PSU - ATX 3.1, PCIe 5.1
ASUS ROG
ASUS ROG LOKI SFX-L 1200W Titanium PSU - ATX 3.1, PCIe 5.1
The ASUS ROG LOKI SFX-L 1200W Titanium PSU is a high-efficiency power supply designed for compact gaming builds and workstations that demand both performance and low noise. It combines full ATX 3.1 compliance with PCIe 5.1 support in a space-saving SFX-L form factor, making it ideal for builders who refuse to compromise on power delivery in tight chassis.
Why this product
1200W in SFX-L form factor
Delivers full-scale power in a compact 125 × 125 × 63.5 mm chassis, eliminating the size penalty usually paid for premium efficiency and next-gen compliance.
ATX 3.1 and PCIe 5.1 ready
Tighter voltage regulation meets next-generation hardware demands. Bundled 16-pin cables deliver up to 600W directly to PCIe Gen 5.1 graphics cards.
80 PLUS Titanium with 0dB mode
Up to 94% efficiency reduces heat and fan noise. Fan shuts off entirely below 40% load, enabling silent light gaming.
Dual ball bearing fan
Lasts up to twice as long as sleeve bearings. Combined with ROG heatsinks and Lambda S++ noise certification (below 35 dB), it prioritises long-term reliability.
Compact connector array
Two 16-pin PCIe connectors, dual 4+4-pin CPU headers, four 8-pin auxiliaries, six SATA and four peripheral connectors handle multi-GPU and high-end component builds without adapters.
- Power output1200W
- Form factorSFX-L
- Efficiency80 PLUS Titanium
- ATX standardATX 3.1
- Noise certificationLambda S++ (below 35 dB)
- Weight2.15 kg
- Warranty/MTBF>120,000 hrs @ 25°C
- SKUASU-2457
- EAN4711081721574
- SFX-L chassis and compact ATX builds. Dimensions 125 × 125 × 63.5 mm fit standard SFX-L mounting.
- PCIe Gen 5.0 and 5.1 graphics cards. 16-pin connectors rated for 600W delivery.
- Modern multi-core CPUs. Dual 4+4-pin CPU connectors support current high-end processors.
- Legacy PCI or older equipment. ATX 3.1 compliance assumes modern motherboards and components; older systems may lack proper voltage sensing for optimal operation.
- Full-size ATX chassis. This is SFX-L only; it will not fit standard ATX mounting.
Best for
- Small-form-factor (SFF) enthusiasts
- Builders prioritising silent operation in light workloads
- Next-gen GPU owners who need full PCIe 5.1 support
- Systems where long supply lifespan and low thermal output matter
- Multi-GPU or high-core-count workstations in compact builds
Trade-offs
- Standard ATX builds: SFX-L form factor is not compatible with full-size ATX chassis.
- Budget-conscious buyers: Titanium efficiency and ATX 3.1 compliance command a premium over Gold or Platinum units.
- Very high sustained loads: 0dB fan-off mode operates only below 40% load; sustained heavy workloads will keep the fan running.
The World's Quietest and Most Powerful SFX-L PSU.
Taking after the ROG Thor, the ROG Loki 1200W Titanium brandishes the same enthusiast-grade components and features, all packed into an SFX-L form factor.
ATX 3.1 ushers in tighter voltage and current regulation guidelines for next-gen hardware - and ROG Loki steps ahead of the curve by being fully compliant.
A 16-pin PCIe cable ripe for piping up to 600W of power to PCIe Gen 5.1 graphics cards is bundled with the PSU, bringing large-scale capabilities to SFF rigs.
ROG heatsinks cover critical components. Lower temps result in a longer lifespan and reduced noise.
Dual ball fan bearings can last up to twice as long as sleeve bearing designs.
0dB technology lets you enjoy light gaming in relative silence. To reduce noise output, the PWM-controlled fan shuts off when the PSU load is 40% or below.
ATX 3.0 compatible: ROG Loki is compliant with ATX 3.0 guidelines and bundled with 16-pin PCIe cables that can pipe up to 600W of power to PCIe Gen 5.0 graphics cards.
Lambda Standard ++ certification: Certified low noise levels, below 35 dB.
General
| Brand | ASUS ROG |
|---|---|
| Form factor | SFX-L |
| Total output | 1200W |
| Dimensions | 125 × 125 × 63.5 mm |
| Weight | 2.15 kg |
Power delivery
| Efficiency rating | 80 PLUS Titanium |
|---|---|
| ATX standard | ATX 3.1 |
| Power factor correction | Active PFC |
| +12V rail maximum | 100A |
| +3.3V and +5V maximum | 20A each |
| Protection features | OPP/OVP/UVP/SCP/OCP/OTP |
Connectors
| Motherboard | 24/20-pin × 1 |
|---|---|
| CPU power | 4+4-pin × 2 |
| PCIe power | 16-pin × 2, 8-pin × 4 |
| SATA power | × 6 |
| Peripheral | × 4 |
Cooling & noise
| Fan bearing | Dual ball bearing |
|---|---|
| 0dB technology | Fan off below 40% load |
| Noise certification | Cybenetics Lambda S++ (below 35 dB) |
| Thermal design | ROG heatsinks on critical components |
| MTBF | >120,000 hrs @ 25°C |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.