CORSAIR HX1200i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe 5.1 Compliant - Fluid Dynamic Bearing Fan - CORSAIR iCUE Software Compatible - 80 Plus Platinum Efficiency - Black
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AI Verdict
This 1200-watt, 80 Plus Platinum, ATX 3.1 power supply with a 140mm FDB fan is for high-end builds needing stable power and quiet operation.
This 1200-watt, ATX 3.1 and PCIe 5.1 compliant power supply is engineered for demanding, high-end systems, providing ample power and future-proofing for current and next-gen GPUs. Its 80 Plus Platinum efficiency and 140mm FDB fan with Zero RPM mode ensure quiet and efficient operation, aligning with the needs of users building powerful, low-noise machines.
If 1200 watts is overkill for your components, consider a lower wattage ATX 3.1 and PCIe 5.1 compliant unit with similar efficiency ratings to save money.
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Pros
- Delivers 1200 watts with 80 Plus Platinum efficiency, reaching up to 92% efficiency at 50% load.
- Features a 140mm Fluid Dynamic Bearing fan with Zero RPM mode for near-silent operation at low and medium loads.
- Complies with Intel ATX 3.1 and PCIe 5.1 standards, including a 12V-2x6 GPU cable for modern graphics cards.
- Includes CORSAIR iCUE software compatibility for real-time power monitoring and custom fan curve creation.
- Built with 100% Japanese 105°C electrolytic capacitors, contributing to a 10-year warranty.
- Offers fully modular cabling, allowing builders to connect only necessary cables for cleaner system aesthetics.
Cons
- The iCUE USB cable can be too short for some case layouts, requiring an extension cable.
- Its extended chassis dimensions might not fit all PC cases.
- Some units shipped in boxes labeled ATX 3.0/PCIe 5.0, causing confusion despite being the newer 3.1/5.1 compliant model.
- The price point is on the higher end for a 1200W unit.
Dimension Scores
The 1200-watt output combined with 80 Plus Platinum certification, delivering up to 92% efficiency at 50% load, is top-tier for power delivery and energy conservation.
Its 140mm Fluid Dynamic Bearing fan and Zero RPM mode ensure virtually silent operation under low and medium loads, with the fan only spinning when necessary.
Utilizing 100% Japanese 105°C electrolytic capacitors and backed by a 10-year warranty, this unit is built for long-term reliability and stability.
The fully modular cabling system allows for clean builds by only connecting necessary cables, and it includes a PCIe 5.1 12V-2x6 GPU cable.
Best For
- High-performance gaming PCs with power-hungry graphics cards like NVIDIA RTX 40 Series or future 50 Series.
- Workstations requiring stable and efficient power delivery for intensive tasks.
- Users prioritizing minimal system noise, especially during low to medium load operation.
- Enthusiasts who want software-based power monitoring and control over their PSU.
Not Recommended For
- Budget-constrained PC builds, due to its premium pricing.
- Compact Small Form Factor (SFF) cases, given its extended chassis dimensions.
- Users who prefer a completely analog power supply without software integration.
Watch Out For
- The included iCUE USB cable is often reported as too short, forcing users with larger cases like the Fractal Torrent to buy an extension.
- Some buyers received packaging stating ATX 3.0 and PCIe 5.0, despite the unit being the newer ATX 3.1 and PCIe 5.1 compliant version.
- The PSU's physical size might be an issue, as its extended chassis dimensions can prevent it from fitting in certain cases.
- While it includes a 12V-2x6 GPU cable, some users noted it's a 2x8 to 12V-2x6 configuration, which is native but can be a point of confusion.
Full Specifications
| ASIN | B0CTR6PK19 |
| Brand | Corsair |
| Color | Black |
| Series | HX1200i |
| Wattage | 1200 watts |
| Model Name | HX1200i |
| Form Factor | ATX |
| Item Weight | 5.3 pounds |
| Manufacturer | Corsair |
| Connector Type | ATX |
| Cooling Method | Air |
| Output Wattage | 1200 |
| Item model number | CP-9020281-NA |
| Compatible Devices | Monitor |
| Product Dimensions | 7.87 x 5.91 x 3.39 inches |
| Item Dimensions LxWxH | 7.87 x 5.91 x 3.39 inches |
| Item dimensions L x W x H | 7.87 x 5.91 x 3.39 inches |
What Buyers Say
What really stands out is how quiet this thing is; users consistently report the fan rarely, if ever, spins up unless you're really pushing it, even with high-end GPUs. The iCUE software integration is a big plus for monitoring, but watch out for the short USB cable for that feature. People are also stoked about the ATX 3.1 and PCIe 5.1 compliance, making it ready for current and upcoming power-hungry graphics cards. The 10-year warranty also gives a lot of peace of mind.
“Man, this thing is dead silent, my old PSU sounded like a jet engine but this one's fan just chills, even with my 4080 going full tilt. Only bummer was that iCUE cable, had to dig out an extension.”
Common Praise
- The 140mm fan stays off for most workloads, resulting in near-silent operation.
- Provides stable and clean power, with excellent voltage ripple performance.
- The iCUE software offers useful monitoring and control over power settings and fan curves.
- Fully modular cables make for a tidy and organized PC build.
- The 10-year warranty instills confidence in its long-term durability.
- ATX 3.1 and PCIe 5.1 compliance means it's ready for the latest GPUs.
Common Complaints
- The USB cable for iCUE connectivity is often too short, requiring an extension for some case layouts.
- Some units arrived in packaging incorrectly labeled ATX 3.0/PCIe 5.0 instead of the actual 3.1/5.1 compliance.
- The physical size of the unit can be a tight fit or incompatible with smaller PC cases.
- The price is a common point of discussion, being higher than many alternatives.
Ownership Tips
- After a few weeks, the Zero RPM fan mode is genuinely effective; the fan rarely spins up unless running demanding benchmarks.
- The iCUE software is more useful than expected for checking power draw and temperatures, though the USB cable length was a minor setup hurdle.
- Cable routing was straightforward thanks to the fully modular design, making for a much cleaner build than previous PSUs.
- The unit feels substantial and well-built, reflecting the premium components inside.
- No coil whine has been detected, even under heavy loads, which is a relief compared to some other PSUs.
Frequently Asked Questions
Is this power supply compatible with NVIDIA RTX 40 series graphics cards?
Yes, it is fully compatible and includes a PCIe 5.1 12V-2x6 GPU cable specifically for modern graphics cards like the NVIDIA RTX 40 Series.
Does this PSU make a lot of noise?
No, it features a 140mm Fluid Dynamic Bearing fan with a Zero RPM mode, meaning the fan switches off entirely at low and medium loads for near-silent operation.
Can I monitor the power supply's performance?
Yes, it's compatible with CORSAIR iCUE software, which allows you to monitor power settings, create custom fan curves, and toggle overcurrent protection.
What is the warranty period for this power supply?
Corsair provides a 10-year manufacturer's warranty for this HX1200i unit.
Is this an ATX 3.0 or ATX 3.1 power supply?
This is an ATX 3.1 and PCIe 5.1 compliant power supply, even if some packaging might incorrectly state ATX 3.0.
Buying Guide
When you're looking at a power supply, you need to think about how much power your PC actually needs, especially your graphics card and CPU. This 1200-watt unit is for serious power users. Also, check its physical dimensions against your case's PSU clearance, as some units are longer. Don't forget to consider efficiency ratings like 80 Plus Platinum, which tells you how much power is actually delivered to your components versus wasted as heat.
Wattage (1200 watts)
This is the total power your PSU can deliver. Think of it like the horsepower of a car; more watts means it can handle more powerful components, especially high-end graphics cards and CPUs, without struggling. For example, a 1200-watt unit is like having a powerful engine ready for demanding tasks.
80 Plus Platinum Efficiency
This rating indicates how efficiently the PSU converts AC power from your wall into DC power for your PC. Platinum means it's very efficient (up to 92% at 50% load), wasting less energy as heat and potentially saving you a tiny bit on your electricity bill, like a fuel-efficient car.
ATX 3.1 & PCIe 5.1 Compliant
These are the latest industry standards for power supplies, ensuring compatibility with new hardware, especially next-generation graphics cards. It means the PSU can handle transient power spikes from modern GPUs and comes with the correct 12V-2x6 power connector, like having the right charging port for your newest phone.
Fully Modular Cabling
This means you only plug in the cables you actually need, leaving out the rest. It's like having a custom-built wardrobe where you only install the shelves and drawers you'll use, making your PC's interior much tidier and improving airflow.
Alternatives
If this wattage is too high, look for ATX 3.1 and PCIe 5.1 compliant PSUs with lower wattage (e.g., 850W or 1000W) and similar 80 Plus Platinum efficiency. If your case is small, prioritize units with standard ATX dimensions rather than extended chassis lengths.
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