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TX650M, NAS upgrade to 20 drives, do I need an upgrade?

post #1 of 4
Thread Starter 
I've just bought a new case that'll hold 20 HDDs, plus I'll be using a couple of SSDs.
I already have 7 4TB Seagate Barracudas. I plan to purchase another 13.
The CPU and motherboard is the E3-1240 v3 and E3C224D4I-14S.
I've not figured out the fan set up just yet on my case, but there will be anything from 7-12 case fans.
And the PSU I currently have is the Corsair TX650M.

The current HDDs I have are: ST4000DM000 and the 13 I will be buying are ST4000DM005.

ST4000DM000:


ST4000DM005


And the TX650M specs are:


So that's an average of 40amps for the spin up of 20 of these HDDs, leaving 14 amps spare. Is that going to be enough for everything else?
post #2 of 4
I would say that it will be cutting it close. It may overload if the CPU is under heavy load when the drives spin up though. An 80W CPU will need 6A when under full load. It comes down to whether you feel safe running a server with the PSU so close to being maxed out in a worst case load. I would personally put a 850W or better PSU in the system to hit a higher efficiency but the 650 should be sufficient.

EDIT: What are you running for raid cards/HBAs? Those can draw a not insignificant amount of power (I have two 75W HBAs in one of my servers)
post #3 of 4
Thread Starter 
My motherboard has a built in 8 port SAS, LSI 2308.
It also has an Intel SAS 4 port SAS as well as 2 sata 3.

I've also just bought a AOC-SASLP-MV8 PCI card.

See, I'd rather not be spending money needlessly, HOWEVER as the new server will be in my bedroom (still live at the parents and the Lian Li D8000 is huge), I'm trying to keep it as quiet as possible, and a new PSU that will spin the fan down under low loads does sound appealing.
post #4 of 4



A Quick google search shows this is the noise from the PSU at various continuous loads. My best guess is that if somehow you are spinning all your HDDs up, and stressing the CPU you will hit ~90% PSU load for a few seconds, My ST3000DM001s spin up in ~5 seconds. This means that you could see spikes to 90% load, then after the HDDs are spun up the load will be about 25% with the drives all active and the CPU at full load. Based off that I would say that you should be fine with the 650W PSU.
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