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Be Quiet! Pure Power 9 CM 600 W (L9-CM-600W)

PostPosted: June 8th, 2016, 4:01 am
by LongRunner
http://www.hardwareinsights.com/l9-cm-600w-review/

Quite a mediocre unit, overall. And the capacitors used on the standby supply don't inspire confidence at all; not only are they (Cheapo) Teapos, placed very close to the diode (which will dissipate 1.5W easily at the label rating), but (according to the datasheet) a 3300μF 10V 10mm Teapo SC has a ripple current rating of 1.74A. I read before (IIRC in an article on Tom's Hardware) that the RMS ripple current through the capacitor directly following the rectifier in a flyback converter can be 80-90% of the load current; on that basis, something like Nichicon HW would be more appropriate there…

Re: Be Quiet! Pure Power 9 CM 600 W (L9-CM-600W)

PostPosted: June 8th, 2016, 8:11 am
by Behemot
That may be the reason why sometimes they put polymer just after the rectifier, followed by wet lytic after the coil.

Re: Be Quiet! Pure Power 9 CM 600 W (L9-CM-600W)

PostPosted: June 14th, 2016, 5:58 am
by powernod
At the review conclusion you wrote:
Be aware of… /?\

Can you explain this mark a little?, i'm rather confused about its meaning :huh:

Re: Be Quiet! Pure Power 9 CM 600 W (L9-CM-600W)

PostPosted: June 14th, 2016, 6:10 am
by LongRunner
It's basically to list something that might be a problem, depending on what the user does with the unit.

Re: Be Quiet! Pure Power 9 CM 600 W (L9-CM-600W)

PostPosted: June 14th, 2016, 7:04 am
by Behemot
Yeah mostly for remaining things which are not as bad but it is good mentioning them. Like "limited availability", "multiple revisions", "buying this unit" :group: etc.