is an silverstone st50f-230 500W PSU ok to use with i3 4130?

Solution
Thank you for pointing that out - I did miss that it is a Strider and not a Strider Plus or Essential. The SevenTeam built ST50F-230 does not show Haswell compatibility which basically means in may not be able to handle the low power states of Haswell. There should be no issues running it but it may go "catatonic" if the PC is put into a hibernate or low power state. I would suggest looking to budget a newer PSU (perhaps a little higher quality also) but wouldn't push it as a necessity right away (just don't enable sleep states)
Thank you for pointing that out - I did miss that it is a Strider and not a Strider Plus or Essential. The SevenTeam built ST50F-230 does not show Haswell compatibility which basically means in may not be able to handle the low power states of Haswell. There should be no issues running it but it may go "catatonic" if the PC is put into a hibernate or low power state. I would suggest looking to budget a newer PSU (perhaps a little higher quality also) but wouldn't push it as a necessity right away (just don't enable sleep states)
 
Solution
About the only objective thing I can say about HEC is that they do design and build their own PSU's but, they do not supply those PSU's to independent reviewers (HardwareSecrets, JonnyGuru, [H]ard|OCP and the like). Most discussions I've found go something along the lines of "they are stable PSU's" but again these are not electrical engineers explaining what is going on inside nor measuring deviations from the ideal values. I really don't know what to say about it's quality other than owners seem to be contnet