CORSAIR RM850x
CORSAIR RM850x Review & Specifications
The CORSAIR RM850x by Corsair is a power supply unit that provides 850 watts of power output. This unit follows the 3.1 standard and comes in a ATX size. It is certified with 80 PLUS Gold and rated at Gold efficiency, reaching a peak efficiency of 91%. It features a 140 mm cooling fan with fan stop support, and is actively cooled. This PSU is modular . It delivers:
- 71 A on the 12V rail (1 rail(s))
- 20 A on the 5V rail
- 20 A on the 3.3V rail
Power Supply Performance
The CORSAIR RM850x is a high power PSU, sufficient for mainstream gaming systems and content creation workstations. It provides sufficient power for systems with modern multi-core CPUs and performance-class GPUs, offering headroom for overclocking and future upgrades.
This PSU provides a very high efficiency of 91%, rated as Gold. It offers superior energy conversion and lower heat output, making it ideal for performance systems. The included 10-year warranty suggests strong build quality and long-term reliability.
This PSU offers moderate value, priced at $164.7 per kilowatt. It delivers decent performance and efficiency, making it a solid mid-range choice for most PC builds. It strikes a good balance between performance and cost, especially for builders prioritizing stability without overspending.
General Information
| Manufacturer | Corsair |
|---|---|
| Power Supply Name | CORSAIR RM850x |
| Current Price Amazon | $140 |
| Amazon Price Updated | 1 day, 13 hours ago. |
| Power Supply Available | True |
Specification
| Power Output | 850 W |
|---|---|
| ATX Version / Form Factor | 3.1 / ATX |
| Certifications | 80 PLUS Gold |
| Efficiency Rating | Gold |
| Modular / Fanless | True / False |
| Fan Size / Fan Stop | 140 mm / True |
| Dimensions | 160x150x86 |
| Warranty | 10 years |
| Comment | Hi quality and good overall performance |
Performance
| Input Voltage | 100-240 V |
|---|---|
| Number of 12 V Rails | 1 |
| Output 12V / 5V / 3.3V | 71 A / 20 A / 20 A |
| Maximum Efficiency | 91% |
| Price per kW | 164.7 USD/kW |
CORSAIR RM850x Compared to Similar Performance PSUs
Power Supply Price / Performance Table
| Power_Supply (Desc) | Price (Desc) | Quality_&_Perf (Desc) | Q&P/Price (Desc) | USD/Kilowatt (Desc) |
|---|---|---|---|---|
|
$80
|
0.0%
|
77.6%
|
97.1%
|
94.0
94.0
|
|
|
$211
|
↑
17.5%
|
77.2%
|
36.6%
|
248.2
248.2
|
|
|
$120
|
0.0%
|
77.2%
|
64.4%
|
141.2
141.2
|
|
|
$140
|
↑
76.1%
|
77.2%
|
55.2%
|
164.7
164.7
|
|
|
$90
|
↓
-48.7%
|
77.2%
|
86.3%
|
105.3
105.3
|
|
|
$209
|
↓
-1.0%
|
77.2%
|
36.9%
|
245.9
245.9
|
|
|
$123
|
↓
-17.7%
|
77.2%
|
62.5%
|
145.3
145.3
|
|
|
$160
|
↑
13.8%
|
76.9%
|
48.0%
|
188.2
188.2
|
|
|
$110
|
0.0%
|
76.9%
|
69.9%
|
129.4
129.4
|
PSU Comparison and Detail Specifications Table
| Specification |
No image available |
Perf Chart | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Price |
$80
0.0%
|
$211❗
↑
17.5%
|
$120
0.0%
|
$140
↑
76.1%
|
$90
↓
-48.7%
|
$209❗
↓
-1.0%
|
$123
↓
-17.7%
|
$160
↑
13.8%
|
$110
0.0%
|
| Price per kW | 94.0 USD/kW | 248.2 USD/kW | 141.2 USD/kW | 164.7 USD/kW | 105.3 USD/kW | 245.9 USD/kW | 145.3 USD/kW | 188.2 USD/kW | 129.4 USD/kW |
| Manufacturer | MONTECH | ASUS | NZXT | Corsair | Corsair | ASUS | ASUS | Seasonic | Thermaltake |
| Wattage | 850 W | 850 W | 850 W | 850 W | 850 W | 850 W | 850 W | 850 W | 850 W |
| Ver. / FF | 3.1 / ATX | 3.0 / ATX | 3.1 / ATX | 3.1 / ATX | 3.0 / ATX | 2.4 / ATX | 3.1 / ATX | 3.0 / ATX | 3.0 / ATX |
| Efficiency | Gold (92%) | Gold (91%) | Gold (91%) | Gold (91%) | Gold (91%) | Gold (91%) | Gold (91%) | Gold (90%) | Gold (90%) |
| 12V Rails | 1 / 71 A | 1 / 71 A | 1 / 71 A | 1 / 71 A | 1 / 71 A | 1 / 70 A | 1 / 71 A | 1 / 70 A | 1 / 71 A |
| 12V/5V/3.3V | 70 A / 20 A / 20 A | 71 A / 22 A / 22 A | 71 A / 22 A / 22 A | 71 A / 20 A / 20 A | 71 A / 20 A / 20 A | 70 A / 20 A / 20 A | 71 A / 25 A / 25 A | 70 A / 20 A / 20 A | 71 A / 20 A / 20 A |
| Fan Size | 135 mm | 135 mm | 135 mm | 140 mm | 140 mm | 135 mm | 135 mm | 120 mm | 120 mm |
| Modular | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
| Fan Stop | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
| Fanless | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ |
| Dimensions | 140 x 150 x 86 | 180 x 150 x 86 mm | 135 x 135 x 25 mm | 160x150x86 | 160mm x 150mm x 86mm | 160 x 150 x 86 mm | 150 x 150 x 86 mm | 140 × 150 × 86 mm | 150mm(W)x86mm(H)x140mm(D) |
| Warranty | 10 years | 10 years | 10 years | 10 years | 10 years | 10 years | 10 years | 10 years | 10 years |
Power Supply Specification Table
| Power_Supply (Desc) | Wattage (Desc) | ATX Ver / FF / Modular | Efficiency | 12V Rails / Amp | Output 12V/5V/3.3V | Warranty |
|---|---|---|---|---|---|---|
| 850 W | 3.1 / ATX / True | Gold, 92% | 1 / 70.80 A | 70 A / 20 A / 20 A | 10 years | |
| 850 W | 3.0 / ATX / True | Gold, 91% | 1 / 71.00 A | 71 A / 22 A / 22 A | 10 years | |
| 850 W | 3.1 / ATX / True | Gold, 91% | 1 / 71.00 A | 71 A / 22 A / 22 A | 10 years | |
| 850 W | 3.1 / ATX / True | Gold, 91% | 1 / 71.00 A | 71 A / 20 A / 20 A | 10 years | |
| 850 W | 3.0 / ATX / True | Gold, 91% | 1 / 71.00 A | 71 A / 20 A / 20 A | 10 years | |
| 850 W | 2.4 / ATX / True | Gold, 91% | 1 / 70.00 A | 70 A / 20 A / 20 A | 10 years | |
| 850 W | 3.1 / ATX / True | Gold, 91% | 1 / 71.00 A | 71 A / 25 A / 25 A | 10 years | |
| 850 W | 3.0 / ATX / True | Gold, 90% | 1 / 70.00 A | 70 A / 20 A / 20 A | 10 years | |
| 850 W | 3.0 / ATX / True | Gold, 90% | 1 / 71.00 A | 71 A / 20 A / 20 A | 10 years |
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