PSU for small system

[haps]

Hi, I'm building a system around an ASRock c236 wsi, e3-1245 v6 cpu, 16g(for now, but later 32g) of ram - I'm not sure what to get here, the asrock qvl is very sparse. I was just going to get some Kingston (but from the .ca site):
https://www.newegg.com/Product/Product.aspx?Item=N82E16820242273
Any screaming warnings about the ram would be appreciated. I chose it because it's the only one I could find that's vaguely reasonably priced up here.

I plan on a single ssd boot drive and a pair of 8tb reds mirrored (this is not a massive array, I just want some zfs checksumming so my precious data doesn't bitrot).
My question is, I have a nice seasonic 300watt Seasonic sfx psu which has been running my current system (same # of hdds, but a low power e3 v2 cpu on an old gigabyte z77 mini-itx board). I think there should be no reason that can run this system, even if I double the number of spinnys to 4 (ie when I'm migrating data), but I'd just like to confirm that before I start putting things together. If I do replace it, I'll probably choose a 450W 80+gold corsair or seasonic, barring screaming warnings/recommendations:
https://www.amazon.com/dp/B01CGGOXWQ
https://www.amazon.com/dp/B07J317QZJ/

Yes, the motherboard only supports 32g, has audio outs, no ipmi, and is in league with the devil.

 

[Constantin]

@jgreco wrote a PSU guide that is good reading. You may or may not agree with the values he uses for each spinning disk, so look up the correct one for your drives in @farmerpling2 amazing disk drive resource page. I use a Platinum Seasonic in my system because the higher-rated PSUs are required to maintain high efficiency even at part-load conditions.

 

[jgreco]

You may or may not agree with the values he uses for each spinning disk, so look up the correct one for your drives in @farmerpling2 amazing disk drive resource page.

I don't suggest guessing at significantly *lower* numbers than mine, because if you do select a drive type with lower consumption and then later upgrade, ... Also, we've observed that drives don't always seem to follow the numbers in the spec sheet. Tread carefully.

If you run with my general sizing strategy, though, you will have a good bit of safety margin.

 

[Constantin]

That's great to know. My Seasonic Platinum is good for 400W, which exceeds the peak draw per the TL DR; guide is for an 8-drive array by about 10%. Perhaps too close to the edge. Trouble is, HGST doesn't seem to publish maximum power draw for 10TB He10 drives. Anyhow, I've had zero issues with the power supply. But were I to upgrade the motherboard, I likely should use a 450W unit at minimum. The avoton is pretty efficient after all.

 

[haps]

Thanks for the input. I've downgraded my CPU pick to a Pentium G4600 (due to price), so moving from 73->51W TDP, but I think that has very little bearing overall. It's tough to think in terms of peak vs average vs idle power, in the sense that peak power draw from the hdds will happen on spinup, but not during peak cpu use. Also, motherboard peak consumption is tough to determine, even max during use. SSDs = 6w or so? Fortunately as I wait for parts to arrive I have many hours to ponder (obsess) over this detail.

 

[Constantin]

IIRC, Cpu power consumption and HDD power consumption were both high the last time I looked at the unit during a scrub.