What makes the Corsair HX850 tick
Busting
out the specs first.
| Corsair HX850 | |
|---|---|
| Rated output power | 850W @ up to 50°C |
| Power specification | ATX12V 2.3/EPS12 v2.91 |
| Power switch | Yes |
| Efficiency | 85% @ 20% load 88% @ 50% load 85% @ 100% load |
| 80 PLUS certification | Silver* |
| Input voltage (AC) | Auto-ranging 90-264v, 47-63Hz |
| Fan(s) | 1 x 140mm |
| Operating temperature range | 0-50°C |
| Cable runs (pre-attached) |
24-pin EATX (split) EPS (8-pin) 1 x 6+2 PEG |
| Cable runs (modular, flat) | EPS (8-pin) 1 x 6-pin PEG 1 x 6-pin PEG 1 x 8-pin PEG 1 x 8-pin PEG 2 x 4-pin Molex, 2 x SATA |
| Max. currents |
+3.3V: 25A |
| Max combined 3.3V & 5V output | N/A |
| Dimension (W x H x L) | 150 x 86 x 180mm |
| Warranty | 7-year, limited |
| Price | £140 |
*
Corsair claims to have
attained the 80 PLUS Silver classification but the results don't
yet appear
to have been uploaded to the
database.
Analysis
Inevitably, the Corsair HX850 shares many of the performance-orientated characteristics as its bigger and more expensive brother, the HX1000W. Both PSUs are based on Channel Well Technology's designs but are heavily modified for better-than-default performance, according to Corsair. Both share a 140mm temperature-controlled, double-ball-bearing fan; are equipped with 105°C-rated capacities; use DC-to-DC conversion for the 3.3V and 5V lines, and are certified for three-way SLI.
Further, the modular cable-runs are flat, good for airflow and aesthetics. We like the fact that the PSUs are rated to a specified wattage with an ambient temperature of up to 50°C, intimating that they can be pushed farther in regular conditions.
There are a few differences between the two, however, reinforcing the fact that they're not the same PSU rebadged as a lower-capacity model. The 750W/850W models use a single 12V source that's shared for the wattage-hungry components, including graphics cards and CPU(s). One benefit of such an approach lies with the ability to provide power to components whose peak usage may well trip many-railed power supplies.
The mid-range models are also 20mm shorter than the HX1000 although the other dimensions remain the same. The warranty, too, is different, as Corsair ramps it up to seven-year cover instead of five. Lastly, the new HX-series PSUs are ATX12V 2.3 compliant, as opposed to ATX12V 2.2, and the main differences pertain to increased efficiency and a slight change to the CPU's 12V requirements for the V2.3 spec.
Phew, lots of writing and no pictures. Rectify this egregious wrong by clicking on the next page.
Analysis
Inevitably, the Corsair HX850 shares many of the performance-orientated characteristics as its bigger and more expensive brother, the HX1000W. Both PSUs are based on Channel Well Technology's designs but are heavily modified for better-than-default performance, according to Corsair. Both share a 140mm temperature-controlled, double-ball-bearing fan; are equipped with 105°C-rated capacities; use DC-to-DC conversion for the 3.3V and 5V lines, and are certified for three-way SLI.
Further, the modular cable-runs are flat, good for airflow and aesthetics. We like the fact that the PSUs are rated to a specified wattage with an ambient temperature of up to 50°C, intimating that they can be pushed farther in regular conditions.
There are a few differences between the two, however, reinforcing the fact that they're not the same PSU rebadged as a lower-capacity model. The 750W/850W models use a single 12V source that's shared for the wattage-hungry components, including graphics cards and CPU(s). One benefit of such an approach lies with the ability to provide power to components whose peak usage may well trip many-railed power supplies.
The mid-range models are also 20mm shorter than the HX1000 although the other dimensions remain the same. The warranty, too, is different, as Corsair ramps it up to seven-year cover instead of five. Lastly, the new HX-series PSUs are ATX12V 2.3 compliant, as opposed to ATX12V 2.2, and the main differences pertain to increased efficiency and a slight change to the CPU's 12V requirements for the V2.3 spec.
Phew, lots of writing and no pictures. Rectify this egregious wrong by clicking on the next page.
