ASRock
ASRock Steel Legend SL-850G 850W 80 Plus Gold & Cybenetics Platinum Full Modular Power Supply ATX3.1 PCIe5.1 Ready with Dual Color 12V-2x6 Cable 10 Years Warranty 135 mm FDB Fan Japanese Capacitor
Bottom line: The ASRock Steel Legend SL-850G 850W 80 Plus Gold & Cybenetics Platinum ($79.99 on Amazon as of 2026-10-06): 80 PLUS Gold plus Cybenetics Platinum and Lambda A+ certified for efficiency and low noise; main trade-off: ASRock is newer to power supplies than Seasonic, Corsair, or be quiet.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ 80 PLUS Gold plus Cybenetics Platinum and Lambda A+ certified for efficiency and low noise
- ✓ ATX 3.1 and PCIe 5.1 ready for native RTX 50-series 12V-2x6 power delivery
- ✓ 10-year warranty, well past the 5-7 years typical at the 850W tier
- ✓ 100% Japanese capacitors throughout, not just the primary bulk cap
- ✓ Fully modular cabling lets you omit unused SATA and PCIe leads
Cons
- ✗ ASRock is newer to power supplies than Seasonic, Corsair, or be quiet
- ✗ 850W caps headroom for a 4090/5090 plus high-core-count CPU on transient spikes
- ✗ 5V BOOST is a niche feature most standard builds will never engage
- ✗ No stated cable length spec - verify reach in tall or inverted-layout cases
SpecPicks Verdict
SpecPicks scored ASRock Steel Legend SL-850G 850W 80 Plus Gold & Cybenetics Platinum… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. ASRock's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- System Compatibility Note: Standard ATX form factor (150mm x 150mm x 86mm) fits most mid-tower and full-tower cases. Please verify chassis PSU clearance and power requirements before purchase.
- Dedicated Support: Contact us directly through Amazon for any product questions or assistance you may require.
- Premium Efficiency & Quiet Operation: Certified 80 PLUS Gold and Cybenetics Platinum, achieving up to 90%+ efficiency. Cybenetics Lambda A+ acoustic certification ensures near-silent operation with average noise below 20 dBA.
- ATX 3.1 & PCIe 5.1 Compliant: Fully compliant with the latest power delivery standards, supporting high power excursions for stable operation with modern GPUs and motherboards.
- Native 12V-2x6 Connector: Features a native 12V-2x6 (12+4 pin) connector with dual‑color design for easy insertion status confirmation. Backwards compatible with 12VHPWR for broad GPU compatibility.
- 850W Continuous Power: Delivers 850W of continuous power with 70.9A on the +12V rail, capable of handling high-end CPUs and GPUs.
Full Specifications
| Brand | ASRock |
|---|---|
| Weight | 850g |
| Wattage | 850 watts |
| Fan Size | 13.5 centimeters |
| Model Name | Steel Legend |
| Form Factor | ATX |
| Compatibility | PC |
| Connector Type | ATX |
| Cooling Method | Fan |
| Number of Fans | 1 |
| Output Wattage | 850 watts |
| Item Dimensions | 5.91 x 5.91 x 3.39 inches |
| Number of Items | 1 |
| Dedicated Support | Contact us directly through Amazon for any product questions or assistance you may require. |
| Compatible Devices | Personal Computer |
| Connector Quantity | 10 |
| Power Supply Design | Full Modular |
| Warranty Description | 10 years |
| 850W Continuous Power | Delivers 850W of continuous power with 70.9A on the +12V rail, capable of handling high-end CPUs and GPUs. |
| Maximum Input Voltage | 240 volts_of_alternating_current |
Ready to buy?
ASRock Steel Legend SL-850G 850W 80 Plus Gold & Cybenetics Platinum Full Modular Power Supply ATX3.1 PCIe5.1 Ready with Dual Color 12V-2x6 Cable 10 Years Warranty 135 mm FDB Fan Japanese Capacitor is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Related Power Supplies
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- How to Build a Windows 98 Retro PC in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- Best 1440p Gaming GPUs in 2026
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Best Retro Handhelds in 2026 — From $35 to $500
More reviews from the SpecPicks archive
Browse all reviews →- Benchmarking Open LLMs for Tool-Use: RTX 3060 12GB vs Ryzen 5800X CPU-Only
- Jetson Orin Nano Super vs Raspberry Pi 5: Real Edge-AI Benchmarks (2026)
- Best CPU Cooler for the Ryzen 7 5800X: Air vs 120mm vs 240mm AIO
- Windows XP Gaming in 2025: Hardware, Fixes, Best Games
- Windows NT Now Boots on the Nintendo GameCube: What the Homebrew Port Actually Runs
- Self-Hosted Personal Finance: n8n + Actual Budget + Claude
- SANSUI 27" 4K vs KOORUI 27" QD-Mini LED: Best Sub-$400 4K Gaming Monitor
- RTX 5090 AI Cores: What the Specs Actually Mean in 2026
- First Homelab Setup: Hardware, Security & Networking Guide
- AI Rigging 3D Models: The 2026 Hardware Guide
- PS5 DualSense vs 8BitDo Pro 2 on Raspberry Pi 4 RetroPie: Which Controller Wins in 2026?
- Best GPU for ComfyUI & Stable Diffusion Under $300 in 2026
- Best Cooler for a Ryzen 7 5800X: ML240L RGB V2 vs Kraken M22
- What Rig Runs an AI Agent Locally? Building for the Agent Era
- Building a Period-Correct 2001 GeForce 3 Windows 98 SE Rig — With a CompactFlash Boot Drive
- Best Gaming Gifts Under $60 in 2026
- Troubleshooting WinXP Audigy FX Install Failures in 2026
- Ryzen 5 2600 vs Ryzen 9 3900X: Do 12 Cores Buy CPU-Only 8B Inference?
- Sega Genesis Mini vs SNES Classic: The Definitive 2026 Plug-and-Play Retro Showdown
- 3dfx Voodoo2 SLI on Windows 98 SE: Period-Correct Build, Glide Driver Setup, and Real Quake 3 Benchmarks
- Best Controller for PC Emulation and Retro Gaming in 2026
- Raspberry Pi OS Moves to Linux 6.18 LTS: What Changes for Pi Builders
- Best Gaming Mouse for Warzone & FPS Esports in 2026
- Vision LLMs Driving Win98 Driver Installs: Inside Our 4-PC Retro Fleet
Earliest SpecPicks reviews
Browse full archive →- Best GPU for Llama 3.1 8B (2026)
- Best GPU for Qwen 3 14B (2026)
- Best GPU for Qwen 3 32B (2026)
- Best GPU for Llama 3.1 70B (2026)
- Best GPU for DeepSeek-R1 32B (2026)
- Best GPU for Llama 3.1 405B (2026)
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 14B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 70B on NVIDIA GeForce RTX 5090
- How to run DeepSeek-R1 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 4090