350-450W Roundup: 11 Cheap PSUs
by Martin Kaffei on July 3, 2012 1:30 PM ESTFSP Raider 450W 80Plus Bronze Measurements
Voltage Regulation
| +3.3V Regulation/Ripple and Noise | |
| Load | Voltage |
| 5% | 3.28V (7mV) |
| 10% | 3.27V (9mV) |
| 20% | 3.26V (12mV) |
| 50% | 3.22V (14mV) |
| 80% | 3.19V (15mV) |
| 100% | 3.18V (14mV) |
| 110% | 3.17V (19mV) |
| Crossload +12V max. | +0.91% |
| Crossload +3.3V/+5V max. | -2.42% |
| +5V Regulation/Ripple and Noise | |
| Load | Voltage |
| 5% | 5.03V (6mV) |
| 10% | 5.07V (8mV) |
| 20% | 5.07V (16mV) |
| 50% | 5.05V (18mV) |
| 80% | 4.99V (17mV) |
| 100% | 4.97V (20mV) |
| 110% | 4.95V (22mV) |
| Crossload +12V max. | +3.20% |
| Crossload +3.3V/+5V max. | -4.80% |
| +12V Regulation (Worst Ouput)/Ripple and Noise (Worst Output) | |
| Load | Voltage |
| 5% | 12.01V (3mV) |
| 10% | 11.97V (6mV) |
| 20% | 11.93V (13mV) |
| 50% | 11.87V (28mV) |
| 80% | 11.91V (30mV) |
| 100% | 11.92V (33mV) |
| 110% | 11.91V (32mV) |
| Crossload +12V max. | -4.25% |
| Crossload +3.3V/+5V max. | +3.25% |
Noise Levels
| Sound Pressure Level (Ambient: 16dBA, 1m distance) and Temperatures (Δϑ to 23.2 °C ambient temperature) | |
| Load | Opinion |
| 5% | 19 dBA (1.5°C) |
| 10% | 19 dBA (2.5°C) |
| 20% | 19 dBA (4.8°C) |
| 50% | 24 dBA (5.2°C) |
| 80% | 26 dBA (7.9°C) |
| 100% | 28 dBA (8.8°C) |
| 110% | 28 dBA (9.2°C) |
Efficiency and PFC
| Efficiency and Power Factor 115 VAC | ||
| Load | Efficiency | PFC |
| 5% | 78.15% | 0.852 |
| 10% | 84.46% | 0.918 |
| 20% | 87.62% | 0.938 |
| 50% | 88.67% | 0.956 |
| 80% | 87.73% | 0.971 |
| 100% | 87.19% | 0.983 |
| 110% | 86.84% | 0.988 |
| Efficiency and Power Factor 230 VAC | ||
| Load | Efficiency | PFC |
| 5% | 79.49% | 0.827 |
| 10% | 85.36% | 0.881 |
| 20% | 89.07% | 0.928 |
| 50% | 90.54% | 0.941 |
| 80% | 88.93% | 0.967 |
| 100% | 88.21% | 0.979 |
| 110% | 87.57% | 0.984 |
We can hardly imagine that this is just a Bronze unit, but who cares as long as the price is low (MSRP is $55, tax excluded). FSP told us, "It's an authentic 80 Plus Bronze product, [...] but as you mentioned; its efficiency is close to the AURUM". 12V stays above 11.90V at 110% load.+3.3V starts very low and reaches 3.18V at full load. All of the rails have no remarkable transients and ripple is always below 50% of the allowed level. At high loads, FSP is a little louder than most other PSUs in this roundup, but they are very similar overall.
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pvdw - Wednesday, July 4, 2012 - link
Here's some good ones to look at in 350W-450W range:Seasonic X-400 Fanless
Seasonic S12II-380
Silentmaxx Fanless 400W MX460-PFL01
Nexus Value 430
Seasonic M12II-430
And just above the 450W range, but unlikely to use any more power in most systems are these good ones:
Enermax Modu/Pro87+ 500W
Kingwin STR-500
pvdw - Wednesday, July 4, 2012 - link
BTW, though I really enjoy most Anandtech articles, your PSU ones can't beat SilentPCReview. But then I can't see how you could do better without an anechoic chamberCheck out their list of recommended supplies:
http://www.silentpcreview.com/Recommended_PSUs
A5 - Wednesday, July 4, 2012 - link
The cheapest PSU on that list is well over $100, which is more than double the most expensive one in this article, which is about finding a good "cheap" PSU.I'm glad AT did this article as it should encourage a little more competition in the low-end space.
knutjb - Wednesday, July 4, 2012 - link
In my experience I've had a couple low end PSUs do bad things to MBs even though they were modestly loaded. After using a number of different manufacturers all I buy are Seasonics. I get them when they are on sale.I have a 9 yr old 600 S-12? on its second system and the output measures the same as it did when new. Blow out the dust occasionally and it just works. Even in low end systems I don't trust inexpensive PSUs, their quality control is all but non-existent with wide variation in samples.
You get what you pay for and I don't like buying things twice.
pvdw - Thursday, July 5, 2012 - link
A quick search turns up this link:http://www.amazon.com/Seasonic-ATX12V-S12II-430-BR...
The Seasonic S12II 430 for $60 shipped. Or the 380W for $54 shipped.
clarkn0va - Friday, July 6, 2012 - link
Seasonic SS-350ETSupposedly not as quiet as their retail offerings, but always inexpensive. I would like to see how this one holds up against similar offerings.
Maybe AT needs a Bench section for PSUs?
Belard - Wednesday, July 4, 2012 - link
I've bought some CX models for bottom end PCs for clients...But I picked up two 500w models, both were defective.
1) Defective power connector (at the motherboard)...
2) Flutter fan noises.
Returned them, bought Thermaltake TR2s.
piroroadkill - Wednesday, July 4, 2012 - link
When the Corsairs first hit the scene, the HX series were all Seasonic.Corsair is a nice rebrander, but I go straight to Seasonic for my own system's PSU these days. I have a Seasonic X-660..
Arnulf - Wednesday, July 4, 2012 - link
Great article !I wish you could round up even more models and/or present the results in a common bench-like database (you know, like the CPU comparison etc.) where different models coudl be added over time.
silverblue - Wednesday, July 4, 2012 - link
Enermax NAXN ENP450AWT-B 450W - £60 at Scan:http://www.scan.co.uk/products/450w-enermax-naxn-8...
(Unfortunately, out of stock)
Rasurbo RAP350 350W - £44 inc. delivery on eBay:
http://compare.ebay.co.uk/like/280832584568?var=lv...
The 450W variant - £58 inc. delivery on eBay:
http://compare.ebay.co.uk/like/280758645995?var=lv...
Corsair CX430 V2 430W - from £35 inc. delivery:
http://www.google.co.uk/products/catalog?q=Corsair...
You can find FSP Hexa, Aurum and Fortron PSUs quite easily; the Aurum 80 PLUS Gold 500W is £62 inc. delivery.