HuntKey Jumper/R90 300W 80Plus Gold
by Martin Kaffei on March 5, 2011 12:00 AM ESTNoise, Efficiency, and Power Factor
| Sound Pressure Level | |
| Load | dB(A) |
| 10% | 18 |
| 20% | 19 |
| 50% | 22 |
| 80% | 23 |
| 100% | 24 |
| 110% | 26 |
While the HuntKey 300W is audible at high loads, the 1200RPM fan isn't loud. In a typical PC with a closed case, this PSU will be quieter than most CPU, GPU, and chipset fans. If you're after absolute silence, Seasonic's X-400FL will be the better choice, but most users will be quite happy with the low noise from the Jumper 300G. At 10% load (i.e. for a low power HTPC), the fan rotates at less than 650RPM and reaches the limits of our noise monitoring equipment.
Efficiency and PFC
| 115VAC, 60Hz | ||
| Load | Efficiency | PFC |
| 10% | 85% | 0.973 |
| 20% | 88% | 0.975 |
| 50% | 90% | 0.983 |
| 80% | 89% | 0.985 |
| 100% | 87% | 0.986 |
| 110% | 86% | 0.987 |
As always, the power factor correction is high using 115VAC. In addition, this PSU is still more than 85% efficient at 10% load and reaches or exceeds Gold level at 20%, 50%, and 100% load. Efficiency drops a bit once you exceed 80% load, with the maximum result of 90.25% efficiency at 50% load.
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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!