CORSAIR SF850 (2024) Fully Modular SFX Low Noise 80 Plus Platinum Power Supply – ATX 3.1 Compliant – PCIe 5.1 Ready – Small Form Factor – Bracket Included – Black
Bottom line: The CORSAIR SF850 ($199.99 on Amazon as of 2026-10-06): 80 PLUS Platinum efficiency in a 125mm SFX shell for power-dense small-form-factor builds; main trade-off: type-5 Micro-Fit cables are not cross-compatible with older Corsair PSU cable kits.
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 Platinum efficiency in a 125mm SFX shell for power-dense small-form-factor builds
- ✓ ATX 3.1 compliant and PCIe 5.1 ready, absorbing GPU transient power spikes
- ✓ Fully modular Type-5 Micro-Fit cables bend easily in tight SFF chassis
- ✓ 92mm fluid-dynamic-bearing PWM fan with Zero RPM Mode for silence at low load
- ✓ SFX-to-ATX bracket included, so it drops into standard ATX cases too
Cons
- ✗ Type-5 Micro-Fit cables are not cross-compatible with older Corsair PSU cable kits
- ✗ 92mm fan spins faster than a 120/140mm ATX fan once past Zero RPM Mode
Manufacturer description
Give your high-performance SFF PC the power it needs with a CORSAIR SF Series 80 PLUS Platinum SFX Power Supply. ATX 3.0 compliant and PCIe 5.0 ready, the SF Platinum Series delivers high-wattage 80 PLUS Platinum-certified power in a compact form-factor with a fully modular design. A 92mm PWM cooling fan ensures quiet operation, with Zero RPM Mode support for no fan noise at all at low loads. Built exclusively with 105°C rated Japanese capacitors, the SF Platinum Series easily handles high-stress gaming and computing. Includes an SFX-to-ATX bracket for installation in larger cases and a…
SpecPicks Verdict
SpecPicks scored CORSAIR SF850 (2024) Fully Modular SFX Low Noise 80 Plus Platinum… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Compare with similarly-priced alternatives in the power supplies category before committing. 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
- 80 PLUS Platinum Rated SFX Power: Massive Platinum-rated power in a compact SFX form-factor, perfect for the most power-dense small-form-factor PCs or saving space in larger cases
- ATX 3.0 Compliant & PCIe 5.0 Ready: Compliant with the ATX 3.0 power standard from Intel, supporting the PCIe Gen 5 platform and resisting transient power spikes
- Fully Modular, Type-5 Micro-Fit PSU Connectors: With flexible cabling, taking up less space for tidy cable management and compatibility in small cases
- 92mm PWM Cooling Fan: Delivers powerful cooling with low-noise operation thanks to a fluid dynamic bearing
- 105°C Rated Japanese Capacitors: For unwavering power and reliability
Full Specifications
| Brand | Corsair |
|---|---|
| Wattage | 850 watts |
| Fan Size | 92 Millimeters |
| Model Name | SF850 |
| Unit Count | 1.0 Count |
| Form Factor | SFX |
| Model Number | CP-9020256-NA |
| Built-In Media | Item |
| Connector Type | ATX |
| Cooling Method | Air |
| Number of Fans | 1 |
| Output Wattage | 850.0 |
| Item Dimensions | 4.92 x 3.94 x 2.5 inches |
| Mfr Part Number | CP-9020256-NA |
| Compatible Devices | Monitor |
| Connector Quantity | 7 |
| Power Supply Design | Full Modular |
| 92mm PWM Cooling Fan | Delivers powerful cooling with low-noise operation thanks to a fluid dynamic bearing |
| Warranty Description | 7 Year Manufacturer |
| Maximum Input Voltage | 12 Volts (AC) |
Ready to buy?
CORSAIR SF850 (2024) Fully Modular SFX Low Noise 80 Plus Platinum Power Supply – ATX 3.1 Compliant – PCIe 5.1 Ready – Small Form Factor – Bracket Included – Black 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 1440p Gaming GPUs in 2026
- Best Retro Handhelds in 2026 — From $35 to $500
- How to Build a Windows 98 Retro PC in 2026
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
More reviews from the SpecPicks archive
Browse all reviews →- 768GB Optane vs RTX 3060 12GB: The Trillion-Param LLM Reality
- Best Sim Racing Wheel for Beginners on PS5 & PC (2026)
- Prompt Injection Still Breaks Local AI Agents in 2026
- Benchmarking Asus Tablet Repairability Scores 2026
- HyperX QuadCast 2 S vs Blue Yeti for Streamers: Which USB Mic Wins in 2026?
- Ollama vs vLLM for Single-User Local Chat on an RTX 3060 12GB (2026)
- Qwen 3.6 35B-A3B-MTP on a GTX 1060 6GB: How Far Can Old GPUs Still Go?
- Raspberry Pi 5 vs Pi 4 8GB for Homelab: Which Should You Buy?
- Ryzen AI Max 400 'Gorgon Halo' 192GB vs RTX 3060 12GB for Local LLMs
- How to Run a Public Website on a $10 ESP32 Without Servers
- Noctua NH-U12S vs NZXT Kraken M22 in a Mini-ITX Ryzen 7 5800X Build
- Raspberry Pi 5 + Hailo-8L vs Coral Dual Edge TPU: Which AI Accelerator HAT Wins in 2026?
- Build a Pi Zero W Retro Handheld in 2026: Full Parts List and Setup
- GPT and Claude Flunked Bridgewater's Finance Test — Why a Local RAG Box Fills the Gap
- Best Wireless Gaming Controller for PC and Console (2026)
- Open WebUI — self-hosted ChatGPT for your local models
- Logitech G29 / G920 Not Detected on Windows 11: Step-by-Step Driver Fix Guide (2026)
- Can an RTX 3060 12GB Drive a 27-Inch 4K Monitor in 2026?
- Forza Horizon 6 Runs Smooth on Steam Deck — the Dock-and-Settings Combo
- Ryzen 5 5600G vs Ryzen 7 5700X: Best CPU for a First Gaming PC in 2026
- Best PC Cooling for High-TDP Builds in 2026
- Microsoft Now Points to 32GB RAM for Windows 11 Gaming — What It Means for Your Build
- LiteLLM as a Fallback Router: Keep Working When Limits Hit
- GPT-5.6 Sol Matches Fable 5 at 1/3 Cost: Local-Rig Fallout
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