3200G (≠ 3400G) here, with the boxed Wraith Stealth. I've posted my fan control settings in this thread.
Whenever it's about to go idle I (automatically) put mine to transcoding, virtually 24/7, for months now. Which kinda says what I think about the VRM temps, and underutilized processing power.
The fan spins at about 1450 rpm – wattage is below 2.4W
@m4758406, details in my previous posts –, the cpu sits at 62°C (20°C room temp). Even if it hit 80°C I wouldn't be concerned.
Don't give into over-engineering! Which also is a waste.
Goes for the copper air shroud as well, which is overkill and the copper will influence temperatures less than marginally. A crown made of hard paper or strapping tape will do, too. (I don't use one, see above for temps.)
--
The bolts are DIN 7991 M3 (M3×10, but rather 6 or 8). I'd expect every German mechanic, technician, or mechanical engineer to properly express such things. ;-)
(“Case bolts” usually are UNC 6-32.)
--
My guess is Asrock won't support any AMD 4000G in a A300. Would be nice, though.
And, Asrock's new SFF model caters to a less demanding crowd than the A300 imho.
--
Did anyone connect a desktop hdd drive (3.5" drive) to the A300?
I've still some data on one to be uploaded, and like to avoid buying an external enclosure if possible. I am aware consumer 2.5" drives suck less power (sth. like 1W vs 6W when busy) and am worried the tiny SATA connector won't be able to sustain powering the bigger drive.