HuntKey Jumper/R90 300W 80Plus Gold
by Martin Kaffei on March 5, 2011 12:00 AM ESTVoltage Regulation and Quality
| +3.3V regulation | |
| Load | Voltage |
| 10% | +1.72% |
| 20% | +1.64% |
| 50% | +1.09% |
| 80% | +0.81% |
| 100% | +0.15% |
| 110% | +0.04% |
| +5V regulation | |
| Load | Voltage |
| 10% | +2.43% |
| 20% | +2.22% |
| 50% | +1.82% |
| 80% | +1.65% |
| 100% | +1.16% |
| 110% | +0.90% |
| +12V regulation | |
| Load | Voltage best/worst |
| 10% | +1.73% / +1.91% |
| 20% | +1.66% / +1.82% |
| 50% | +1.46% /+1.61% |
| 80% | +1.24% / +1.48% |
| 100% | +1.09% / +1.30% |
| 110% | +0.84% / +1.03% |
Results are measured under room temperature and 115 VAC. HuntKey has one of the best voltage regulation results out of all the high-end PSUs we've tested so far. The DC-to-DC VRMs are more than enough for the power levels listed on the label, so the voltage has low drops on +3.3V and +5V. Even +12V (V1/V2) is absolutely stable. Of course, the need to only handle 300W helps here. Some higher wattage PSUs with DC-to-DC have problems with ATX spec loads, since the VRM PCBs use almost the same dimensioning for their components.
Ripple and Noise
| +3.3V ripple quality | |
| Load | Ripple and noise |
| 10% | 2mV |
| 20% | 3mV |
| 50% | 4mV |
| 80% | 6mV |
| 100% | 9mV |
| 110% | 10mV |
| +5V ripple quality | |
| Load | Ripple and noise |
| 10% | 8mV |
| 20% | 10mV |
| 50% | 13mV |
| 80% | 17mV |
| 100% | 21mV |
| 110% | 23mV |
| +12V ripple quality (worst rail) | |
| Load | Ripple and noise |
| 10% | 19mV |
| 20% | 26mV |
| 50% | 30mV |
| 80% | 22mV |
| 100% | 26mV |
| 110% | 28mV |
+12V has the same problem as the first X-Series with relatively high ripple and noise results at low loads and lower results at high loads. Somewhere between these loads they change the switching type and frequency. Even so, the results are still very good and well within specification. Moreover, most manufacturers don't care about the "unimportant" 3.3V rail, but HuntKey has no more than 10 mV ripple there. Even if it's not the most important rail these days, we appreciate the attention to detail.
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JasperJanssen - Monday, March 14, 2011 - link
Comparing to other high quality, low wattage, lowfeatured units, $80 seems way over the top. If it goes over $60 they'll be lucky to sell a single unit.JasperJanssen - Monday, March 14, 2011 - link
I just checked my local pricewatch, there's a Jumper 550 in there for 60 euro (which contrary to popular belief means 60 dollars, despite the exchange rate). The 550 is a different animal, it has hex grates on the end, but companies generally don't price the 300W low end model above the 550W near-top-end model in a given (Jumper) product range.AnnihilatorX - Saturday, March 5, 2011 - link
In specification page, the sticker photo shows a logo which looks like battery levelIt reads, very high safety margin - can continuously and stabily output 400W
Then why don't they just brand this as 350W?
Something to do with 80Plus certification regarding efficiency at certain load levels?
Concillian - Saturday, March 5, 2011 - link
"Something to do with 80Plus certification regarding efficiency at certain load levels?"Indeed, check the efficiency chart and 110% load shows 86% efficiency.
80+ gold certification requires 87% @ 100% load.
If it were rated at 330W, they'd have to back it down to 80+ silver.
Martin Kaffei - Sunday, March 6, 2011 - link
Correct. 400W e.g. is the rated power for room temperature and 80Plus Bronze.The power and efficiency is always temperature-dependent.
WintersEdge - Monday, March 7, 2011 - link
When and where do you guys think this will be available for purchase? This is definitely the front-runner on my PSU shortlist for my upcoming sandybridge build. I was going to go for the SS X400 but 400W is overkill considering I plan to use the IGP, and it's also quite expensive.And what is up with those other PSU units cited at the very beginning of this review?? How come I can't find them for sale?? I looked up the FSP Group 250W model:
http://www.fsp-group.com/english/1_product/2_detai...
It looks uglier than butt-ugly, but I still wouldn't mind buying it if it was available somewhere... What's up with that?
bobbozzo - Monday, March 7, 2011 - link
s/Season/Seasonic/7Enigma - Monday, March 7, 2011 - link
Thanks for the great review Martin.This is exactly the kind of PSU most of us want. I'd personally like a 400w unit of the same quality for <$130 since I run a high-end video card, but for everything else this 300w unit is just about perfect. It is a bummer about the American version not having the sleeving and black paint job, but it's still a great PSU!
Martin Kaffei - Monday, March 7, 2011 - link
I'm glad that you like the review.Maybe HuntKey will add sleeving for the final edition and has found a distributor in the USA. I've just heard they start to ship this PSU to France now. For about 60-65 €uro. Hope we get more informations soon.
iamkyle - Tuesday, March 8, 2011 - link
AT!!! Seriously - we need bar graphs like the other articles so we can COMPARE the efficiency of the PSU's you review!