turkey3_scratch :
Jonnyguru review
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=508
Highest build quality OklahmomaWolf has ever seen. So that's what you get for $1000 - the best build quality of any PSU. In this case it's not about the price it's about someone who wants the best built PSU.
Not entirely sure about this last one. For exmaple, intake fans on a desktop puts positive air pressure inside and pushes out the dust. The intake fan on a PSU likely does the same. Exhaust fans are what cause dust, the intake fans help prevent dust.
1. Ant yet despite putting all that money and care into building it, it's performance disappoints. I wouldn't put a 9.0 performance rated PSU in a gaming / enthusiast machine with the noted power irregularities and load regulation. from your link:
Performance (40% of the final score) - this certainly has been a memorable review. Performance wise, I can't really say for sure we got what we really wanted today. Half the S&C point goes away for 12V power on irregularities, and half a point has to come off for getting excellent load regulation when we were hoping for mythic. But that's all I'm deducting for here. Ripple control was outstanding and we got the Titanium efficiency we needed. Is this the best performing unit on the market? No. But it got a heck of a lot closer than anything I've tested from this company before.
Impressive by Cooler Master standards ? ... yes. Impressive by industry standards ? .... Not at all.
Why do we want "better" PSUs for a build ? The primary goal is performance, we can do much better for < 1/5th the price. Build Quality is a secondary criteria because we want that performance. Delta has long been recognized as having the best 'board work' in the industry but how many folks go looking for units made by Delta ?
Many times we see "rate my build" posts here with folks who went to pcpartpicker and picked the most expensive item in each category for their new gaming box and what do we see ....
a) X99 platform builds w/ 5960x CPUs which despite the $1500+ cost do not top Z270 builds
b) Titan video cards which, again, despite their great workstation performance for a non quadro card, do not top the x80 Tis in gaming.
c) 64 GB of RAM which brings nothing to the table
I think it's great that CM showed what they can do here ... or perhaps better said, what they can buy from someone else. Some guy in a corner office at CM prolly figured that articles about the build quality would be written and, in some people's minds, it would be assumed that this quality existed at the price levels that actually have significant sales.
But I don't choose a PSU based upon how attractive and neat the board work, etc is ... who does ? I don't want to void the warranty by opening it up to look at it.
In and of themselves, positive / negative pressure is not created by intake or exhaust fans but the relative number and capacity of each. On all but the cheapest cases, intake fan mount locations will have dust filters, exhaust fan mount locations do not. many cases today are configured as follows:
Front = Two intake fan mounts
Rear = One intake fan mount
Top = Three intake / exhaust fan mounts
Bottom or side = One or Two intake fan mounts
The front and rear usually come with the case and no problem with that set up ... but the 1st thing folks usually do when they add fans is put 1-3 fans on top as exhaust because '"hot air rises".
However when we 'do the math', with 3 fans we see this is a bad thing 4 out and 2 in means lotta dust being sucked in thru he rear unfiltered case grilles. But the part oft not recognized is what's carrying in that dust ? The hot exhaust air from that 1200 watt PSU and your 250 watt GFX card(s). Even with just one fan on top, that's 2 out and 2 in ... is that balanced ? Not by a long shot. Those two intake fans remember have intake filters .... depending on how dirty they are you could easily lose 30% of their flow due to the filter resistance... so that's 2 unrestricted fans sucking air out and 2 significantly flow restricted fans blowing in... end result hot exhaust and dust being sucked into case.
The PSU fan itself is neutral in this case ... air sucked into the case from the bottom is exhausted out the rear.
As for wattage ....
Recommended PSU size = 1.5 x typical gaming load
Peak efficiency is at 50%
A PSI w/ Titanium rating will have the following efficiency characteristics as a minimum
10 % Load = 90% (10% of power wasted as heat)
20 % Load = 92% (8% of power wasted as heat)
50 % Load = 94% (6% of power wasted as heat)
100 % Load = 90% (10% of power wasted as heat)
For today's to end SLI build ....
Seasonic Prime 850 ($175) - No need for the $300 1200 watter [prime as nothing I could build **that makes sense** could require that much power. No deductions on performance and "Build Quality" description is just one word "Perfect"
Performance = 10
Functionality = 10
Value = 10
Build Quality = 10
Total Score = 10
CM Master Watt Maker 1200 MIJ ($1000) - Only thing this PSU gives me is bragging rights for the most expensive PSU / PC on the block. Neither I nor anyone else will every see the pretty board work and the BQ rating is no better than above. On the flip side there are several deductions for performance and an overall PR of just 9.0. heck, I bought a lot of EVGA 750 B2s for $5 that were did better at 9.5. And the 7.5 functionality rating on a $1,000 PSU... I don't mind the ribbon cables but cheaping out on documentation and accessories and asking $1k is a bone head move.
Performance = 9
Functionality = 7.5
Value = 10
Build Quality = 10
Total Score = 9.1
The total score for the EVGA B2 750s that we bought for $45 had an overall 9.0 rating. Now I can understand an electronics "nerd" (and, as an engineer, I use that term as a matter of admiration and respect) like the Wolf going gaga over the build quality. But while I like a pretty and aesthetically pleasing PC as much as the next guy, for a PC enthusiast, aesthetic concerns take a huge step back to performance. And to invest an extra $825 over a 850 watt Seasonic Prime or even a 1200 watt prime, I need more than the proverbial pretty face. And it's not as if that huge proce premium is bringing me a longer warranty ... the Prime is 20% longer not that anyone would likely have a reason to use either.