Hi again guys, I have a quick question.
Reading the above I can see that HD's use little power but I need to ask anyway. I intend to build a somewhat more professional server than the one I already have and I intend to use a Xeon X3430 2.4GHz, 8/16GB RAM and a maximum of 8 HD's. According to that wonderful PCU Calculator I should be at around 340W but last time Two Cables calculated this for me the website was overestimating power use by quite a bit so I was wondering whether I would be fine with a 300W PSU or whether I need to get a more powerful one.
Here is a link to the results:
I'm getting an older system mainly for ECC RAM, not because the CPU or motherboard are fantastic. I'm trying to keep it cheap as it will allow me to spend more on the HD's, which are the most important part of the system.
CPU: No idea how much power it actually draws under load, so I'm going with the TDP: 95W
Fans: Lets say 10W total, as I have no idea what fans you're using.
Raid card: 10W
8 7200RPM HDD's, they usually have a power draw around 8W at idle, 12w at load and 25W startup. so worst case scenario that's a peak draw of 200W at startup and 96W under full operational load.
So you're looking at a worst case scenario continues load of around 210W with a max peak load of 315W. So a quality 300W continues rated PSU should be fine, probably.
Take this with a grain of salt as there are more than a few guesses in my estimation.