HuntKey Jumper/R90 300W 80Plus Gold
by Martin Kaffei on March 5, 2011 12:00 AM ESTHuntKey 300W with 80 Plus Gold
We recently received a new power supply from HuntKey dubbed the R90, or Jumper 300G for the western markets. It uses the HK400-52PP layout, which means the PSU is capable of delivering 400W at lower temperatures; however, the 300W rating is for 45C operation. The 300G is also one of the smaller PSUs with an 80 Plus Gold rating, making it an interesting option for HTPCs and average computers. But what about the price?
We don't have an exact figure for the US market yet, but materials and parts should cost less than half of what the Seasonic X-400FL requires, which means final pricing could be around $80-$90. One advantage the Jumper 300G has over the X-400FL is that it uses a native 400W design, where Seasonic is building off an 850W design. Since the 300G comes with a fan, it will obviously generate more noise than the fanless X-400FL, but the temperatures should also be lower. This could very well be the actively cooled alternative to Seasonic's X-400FL.
Unlike Seasonic, this is a fixed cable PSU. The HK400 is similar to what many OEMs might use, only with a retail box around it. HuntKey is quite proud of their design and promises very good performance. While we may not have a firm price yet, we can certainly check the voltage quality and other performance characteristics.
Internally, the unit uses a resonant circuit with ZVS (Zero Voltage Switching), active rectifying, and of course active PFC. While HuntKey sells many cheap power supplies in China, this is an example of the sort of quality they can achieve when they're not chasing the lowest price; we'll see more evidence of this with the capacitors on page four. HuntKey is also one of the first manufacturers to offer an 80 Plus Platinum certified PSU, but that's a topic for another day. The Jumper 300G (or R90) has plenty of reserve capacity, and HuntKey makes use of this by including two PCIe connectors: one 6-pin and one 6/8-pin, both on a single cable. That's a first for the 300W PSU market, and with such features HuntKey hopes to expand their presence in the Asian market.
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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!