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Rosewill CAPSTONE 850M 850W Modular Power Supply (80 PLUS GOLD Certified)
- 850 Watt Power Supply
- ATX 12V v2.31 / EPS12V v2.92
- 80 PLUS GOLD Certified
- Modular Design PSU
- SLI & CrossFire Ready
- 20 + 4Pin Main Connector
- Continuous 850 W @ 50 Degree Celsius
- Silent 135mm Fan with Auto Fan Speed Control
- Single Strong 12V Rail - Ideal for Gaming Systems


The Capstone 850 Watt power supply is 80 PLUS Gold certified and delivers up to 90% efficient performance under typical loads. This high form of efficiency saves energy, reduces heat in your system, decreases fan noise and prolongs the PSU’s life span so you can maximize your gaming activity.

Capstone PSUs are backed by 5 years of warranty. Your power supply unit will operate according to its technical specifications within intended operating environments for the length of the warranty period.

Capstone PSUs have successfully passed safety and compliance tests from CE, FCC, TUV, and cTUVus.

With Auto Fan Speed Control, the power supply’s 135mm fan turns slowly at low temperatures, reducing power consumption and fan noise to near silence. When temperatures increase, fan speed will also increase. This decreases the odds of over-heating, extends the fan’s life span and reduces energy consumption.
A semi-modular PSU design comes with only the essential cables pre-attached. This allows for some customization of additional cables, plus reduced clutter and better airflow compared to non-modular PSUs within your computer case or system.


STYLE | CONNECTOR TYPE | CAPSTONE 550M | CAPSTONE 650M | CAPSTONE 750M | CAPSTONE 850M |
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20+4 Pin | x1, 23.64 in | x1, 23.64 in | x1, 23.64 in | x1, 23.64 in |
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8 & 4+4 Pin - EPS | - | - | x1, 25.61, 35.4 in | x1, 25.61, 35.4 in |
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4+4 Pin - EPS | x1, 25.61 in | x1, 25.61 in | x1, 25.61 in | - |
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Split PCI-E | x1, 23.6, 29.5 in | x2, 23.6, 29.5 in | x2, 23.6, 29.5 in | x2, 23.6, 29.5 in |
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SATA + 1 Molex | x2, 19.7(s), 25.6(s), 31.5(s), 37.4(m) in | x2, 19.7(s), 25.6(s), 31.5(s), 37.4(m) in x1, 19.7(s), 25.6(s), 31.5(m) in |
x2, 19.7(s), 25.6(s), 31.5(s), 37.4(m) in x1, 19.7(s), 25.6(s), 31.5(m) in |
x3, 19.7(s), 25.6(s), 31.5(s), 37.4(m) in |
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Molex + 4 Pin Floppy | x1, 19.7(m), 25.6(m), 31.5(m), 37.4(f) in | x1, 19.7(m), 25.6(m), 31.5(f) in | x1, 19.7(m), 25.6(m), 31.5(f) in | - |
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SATA + Molex + Floppy | - | - | - | x1, 19.7(s), 25.6(m), 31.5(m), 37.4(f) in |
*LEGEND: (in) - inches, (m) - Molex Connector, (s) - SATA Connector, (f) - Floppy Connector
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 5 years
- Limited Warranty period (labor): 1 year
- Read full details
Return Policies
- Return for refund within: Non-refundable
- Return for replacement within: 30 days
- This item is covered by Newegg.ca's Replacement Only Return Policy
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-800-575-9885
- Support Email: techsupport@rosewill.com
- Support Website
- View other products from Rosewill
Pros: Worked great, came with a few spare cables even.
Cons: It stopped working after 5 months.
Overall Review: I wouldn't recommend this one if you're looking for reliability. I'm submitting a warranty repair/replacement request with Rosewill so hopefully that turns things around. I'll update my review after I hear from them if I'm able to.