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Old 05-31-2011, 03:19 PM   #1
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Default Corsair TX850 V2 Power Supply Review

There has been a new article posted.

Title: Corsair TX850 V2 Power Supply Review
URL: http://www.hardwaresecrets.com/artic...ly-Review/1298

Here is a snippet:
"Let's take a look at the revamped Corsair TX850 power supply, dubbed TX850 V2, now featuring a DC-DC design and 80 Plus Bronze certification. It is important to understand that while the old TX850 was..."

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Old 06-15-2011, 09:45 AM   #2
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Updated 06/15/2011: We asked and received a second sample to retest the unit's overload protection. The second sample worked fine.
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Old 06-15-2011, 12:55 PM   #3
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Does a product that may burn if overloaded deserve a Golden Award? If it is more expensive than its identical XFX counterpart, does it deserve a Golden Award?
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Old 06-15-2011, 01:21 PM   #4
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It is a good product. Just because we got a defective unit doesn't mean that the whole production batch is flawed...

Last edited by Gabriel Torres; 06-16-2011 at 09:05 AM. Reason: typo
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Old 06-15-2011, 05:23 PM   #5
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Everyone is skipping TX650 V2,
CX430 V2, TX750 V2, TX850 V2 plenty of reviews.

Finding V2 650 is really hard. Not that I would expect any differences ^^
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Old 06-15-2011, 08:11 PM   #6
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I was surprised at the first review that simply mentioned this PS failed during the overload testing, without any other comments, but that could be interpreted as a neutral stance. I can't recall any mention of getting another sample from Corsair in the initial review, but I could be mistaken. Of course, it is only fair to try another sample to see if the failure was an anomaly, which seems to be the case.

The overall situation is explained in the updated overload test page, so all the facts are available for the readers to form their own opinions. While some readers may think the lack of negative comments as a bias in the direction of the manufacture, PS reviews I have read on a few other web sites that are filled with negative comments when a product fails in one or more aspects, IMO panders to the "burn the witch" mentality. It's to HS's credit that they don't take that stance, although that kind of journalism is not as popular with some people. This illustrates to me how difficult it is to take the middle of the road position, which is rarely viewed as being that at all.

I'm also not sure if a Golden Award is appropriate for this unit. Should these awards be viewed as relative to their product "peers"? For example, the Seasonic X-850 which is also a Golden Award winner, is superior to this unit in many aspects, but does not compete on price. Are your awards then a composite of aspects that give an overall score?
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Old 06-16-2011, 01:47 AM   #7
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In production defects happen. Even if you tighten tolerances to 3 standard deviations, that's a ~.27% chance of failure which quickly becomes quite a few units in a production run of hundreds of thousands.

Generally, the tighter the tolerances, it becomes exponentially more difficult to a product within those tolerances. Thus, more money wasted and frustrated people trying to make the product.

Testing the failure rates of PSUs would be handy for consumers, but it would be costly and time consuming.

It's probably a difficult choice- on one hand, it would be a mistake to say that the OEM makes terrible PSUs based on this one experience, but on the other hand, if the failure rate for these PSUs is discovered to be unusually high, the review would be somewhat embarrassing.
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Old 06-16-2011, 02:17 AM   #8
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All valid points, but in a sample set of two, what if the unit that doesn't burn when overloaded is the anomaly?
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Old 06-16-2011, 03:23 AM   #9
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Quote:
Originally Posted by Onus View Post
All valid points, but in a sample set of two, what if the unit that doesn't burn when overloaded is the anomaly?
Given they are independent of each other, but the review is dependent on the reliability of the first, the answer would be less than 25%! (Assume 49% are stable and 51% are bugged. The odds of getting a bugged one are 51/100, assuming you get a defective PSU, then getting a second good one would be .51*.49 = .2499- if my calculations are correct).


The fact that what you stated could hold true if we assume a margin of 20% or higher defective rate results in a defective product. Assuming that none of the reviewers get a bad product would be (1-.2)^N where N is the number of reviewers. Assuming the products were not cherrypicked for the reviewers, the odds ten reviewers getting a good product is around 10.7% thus it's entirely possible that they could label the product as good, while missing the fact that the product as a whole is defective.



Numbers are interesting, but at the end of the day, it comes down to a company's rapport with its consumers and its image in general. Since both Corsair and Seasonic have built up a good name for themselves, so we assume the best. Subjective? Yes, but it has a strong presence in how the market works. It's not like everyone stopped buying Intel because their motherboards were initially defective.
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Old 06-16-2011, 04:57 AM   #10
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Yes, given Corsair/Seasonic's excellent track record, I see no reason not to give them the benefit of the doubt. Given the plethora of reviews of all their models, I can't really recall many other reviews where one just keeled over and died. (Well, there was one AX1200 sample that HardOCP got that failed quite violently). Granted, it's not a common practice of reviewers to overload the unit (only a few sites do this), but in the other reviews they managed just fine.

Last edited by Silentbob; 06-16-2011 at 05:00 AM.
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