Rosewill
Rosewill CMG5 1200W (CMG1200G5)
Bottom line: The Rosewill CMG5 1200W is a specs-and-price decision rather than a crowd-consensus one in the power supplies category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
Pros & Cons
Pros
- ✓ PCIe 5.0 and ATX 3.0 & 3.1 Compatible
- ✓ Backed by Rosewill's warranty and support channels
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
SpecPicks Verdict
SpecPicks scored Rosewill CMG5 1200W using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Rosewill'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
- PCIe 5.0 and ATX 3.0 & 3.1 Compatible
- Fully Modular 80 PLUS Gold Certified
- Native 600W PCIe 5.0 / Gen 5 12+4 Pin 12V-2x6 Cable
- Up to 235% Power Excursion & 300% GPU Power Excursion
Full Specifications
| Brand | Rosewill |
|---|---|
| Wattage | 1200 watts |
| Form Factor | ATX |
| Model Number | CMG1200G5 |
| Connector Type | 12V2x6, PCI Express, SATA |
| Cooling Method | Air |
| Number of Fans | 1 |
| Output Wattage | 1200 watts |
| Item Dimensions | 11.4 x 9 x 4.6 inches |
| Mfr Part Number | CMG1200G5 |
| Number of Items | 1 |
| Compatible Devices | Desktop |
| Power Supply Design | Full Modular |
| Warranty Description | 5 year manufacturer |
| Maximum Input Voltage | 240 volts |
| Minimum Input Voltage | 100 volts |
| Item dimensions L x W x H | 11.4 x 9 x 4.6 inches |
| System Bus Connector Type | ATX |
| Connector Type Used on Cable | 12V2x6, PCI Express, SATA |
| Full listing title | Rosewill CMG5 1200W, ATX 3.0 & 3.1 Compatible, 80+ Gold Full Modular Power Supply, PCIe 5.0 600W 12V-2x6 Connector, 100% Japanese Electrolytic Capacitors, 120mm FDB Fans - CMG1200G5 |
Ready to buy?
Rosewill CMG5 1200W, ATX 3.0 & 3.1 Compatible, 80+ Gold Full Modular Power Supply, PCIe 5.0 600W 12V-2x6 Connector, 100% Japanese Electrolytic Capacitors, 120mm FDB Fans - CMG1200G5 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.
Related Power Supplies
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- Best Retro Handhelds in 2026 — From $35 to $500
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- How to Build a Windows 98 Retro PC in 2026
- Best 1440p Gaming GPUs in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
More reviews from the SpecPicks archive
Browse all reviews →- Best Retro Gaming Storage Adapters for Win98 and DOS PCs in 2026
- Zhipu ZCode vs Claude Code: Cheaper Agentic Coding, and the Rig to Run It
- Raspberry Pi 5 16GB Ships — Is the Pi 4 8GB Still Worth It?
- Best Webcam for Twitch Streaming on a Budget in 2026
- Best Gaming PC Build 2026: 4K Ray Tracing Guide
- Best Budget FPS Gaming Setup Under $120: Mouse, Pad, Keyboard and Headset for 2026
- Best Quiet PC Upgrades for Apartment Gaming in 2026
- LM Studio vs Ollama on an RTX 3060 12GB: Which Local Runtime in 2026?
- How to run Llama 3.1 70B on Arc B580
- Intel Bartlett Lake vs i9-13900K: More Cores, Fewer Frames
- HyperX QuadCast 2 S vs Blue Yeti for Streaming in 2026
- Best Budget AMD Gaming PC Upgrades in 2026: 5 Parts That Move the Needle
- How Fast Is Local LLM Inference on a Ryzen 7 5800X (CPU-Only, No GPU)?
- Ryzen 7 5800X + RTX 5060 Combo Hits $439 With Cooler
- Samsung and SK Hynix Plan $590B Chip Push as Memory Prices Climb
- CompactFlash as a Win98 Hard Drive: IDE Adapter Setup Guide
- Prime Intellect's $130M raise: build your own agent rig
- Best Wheel and Controller for Truck and Farm Sims in 2026
- USB-to-IDE Adapter vs CF-to-IDE for Imaging Retro PC Drives
- Best Wireless Controller for PC Gaming in 2026
- How to run Qwen 3 14B on Apple M4 Max
- Intel's Bartlett Lake Core 9 273PQE Loses to a Four-Year-Old CPU
- Do You Need a USB Sound Card for Gaming? Recon 50 + Sound Blaster G6 (2026)
- If Your Steam Deck Broke, Would You Buy Another?
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