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Pros: I have used it over 2 years.
It has not failed.
Cons: The main reason I purchased this power supply is to get a low noise power supply.
BUT, It make too much noise, from day 1.
It is quiet enough until it reaches normal operating temperature, afterwards, it make a noise that sounds like ball bearings with no lubricate.
I can hear it grinding 20 feet away.
I am very dissatisfied.
This power supply has "silent" in its name, plus, the fan is called a "silent fan", but, I have lower cost power supplies with smaller fans that did not advertise "silent" that are quieter .
When I am burned on a product, I never buy it again.
Pros: I do not own this Kingwin Stryker STR-500, BUT, just for the info, it appears to be the same as Rosewill SilentNight-500.
I own two of the Rosewill SilentNight-500 and I like them.
Other Thoughts: When using a fanless PSU, always make sure all of the radiated heat from the PSU gets directly out of the computer case. The lowest cost way of doing this is to always make sure the case fan(s) blow air from outside the computer case direcrly into the case. Never, have fans "sucking" air out of the case, because, this will pull outside air into the fanless PSU and dump the heat inside ther case.
I do my fanless PSU setups a little different. I always locate the PSU in a separate chamber inside the computer case. I install a super-quiet, low-volume air flow fan to blow the heat out the back. This arrangement cost more, but, it results in the quietest setup, plus, I know 100% for sure all the heat radiated from the PSU gets directly out of the case. Some may say, why buy a fanless PSU if you are going to use a fan to blow the heat outside? Answer: None of the PSUs with fans are as quiet as the fan I use, plus, fanless PSUs are better designed to conduct & radiate heat away from the internal components.
Cost is not a factor with my designs, it is 100% about getting all of the heat directly out of the case with the lowest sound level.
Pros: I own 2 of these.
I like them.
Appears to be identical to KINGWIN STR-500.
Other Thoughts: Even though this PSU is designed to be fanless, I use a super-quiet, low-volume air flow fan to make sure all heat radiated from the PSU gets out the back of my computer.
I could buy a PSU that claims to have a super-quiet fan inside, but, none that I have owned are as quiet as this setup.