So its been almost 10 years since i’ve swapped computer parts and I am nervous about this. Ive never done any homelab type thing involving big powerful parts, just dealt with average mid range consumer class parts in standard desktop cases.
I do computational work now and want to convert a desktop pc into a headless server with a beefy GPU. I bit the bullet and ordered a used P100 tesla 16gb. Based on what im reading, a new PSU may be in order as well if nothing else. I havent actually read labels yet but online info on the desktop model indicates its probably around a 450~ watt PSU.
The P100 power draw is rated at 250 W maximum. The card im using now draws 185 W maximum. Im reading that 600W would be better for just-in-case overhead. I plan to get this 700W which I hope is enough overhead to cover an extra GPU if I want to take advantage of nvidia CUDA with the 1070ti in my other desktop.
How much does the rest of the system use on average with a ryzen 5 2600 six core in a m4 motherboard and like 16gb ddr4 ram?
When I read up on powering the P100 though I stumbled across this reddit post of someone confused how to get it to connect to a regular consumer corsehair PSU. Apparently the p100 uses a CPU power cable instead of a PCIE one? But you cant use the regular cpu power output from the PSU. Acording to the post, people buy adapter cables with two input gpu cables to one output cpu cable for these cards.
Can you please help me with a sanity check and to understand what i’ve gotten myself into? I don’t exactly understand what im supposed to do with those adapter cables. Do modern PSUs come with multiple GPU power outputs/outlets from the interface these days and I need to run two parallel lines into that adapter?
Thank you all for your help on the last post im deeply grateful for all the input ive gotten here. Ill do my best not to spam post with my tech concerns but this one has me really worried.
Hey it’s dusty PC case guy again :D
Glad to see you got the P100 and it fits properly.
As for your power requirements, I typically just use an online calculator for when I really need to get specific. Normally I just go overboard. Too much won’t be bad, not enough won’t power things. Nothing should be damaged from too high, or too low psu.
https://www.newegg.ca/tools/power-supply-calculator
I started, but then realized you didn’t include storage drives, quantity and size which makes it hard
Overall, I suspect a 700 would be borderline the minimum. P100 you claim does 250, the 1070 does 150. I did up a quick calc for an ATX mobo, 3x 8gb ram (since you only had 3dimms in your previous question), and 2x 1070 video cards. It recommends 600-699watt The p100 obviously draws more so perhaps a 750-800w?
You’d also need to make sure that the PSU has enough 8pin connectors on board. I suspect you’d need either 2, or 4 but it really depends on what the video card manuals state they need. If it requires the adapters or not
Hope the calculator helps
You are so cool! Thanks!! :) I don’t want to bother you with more questions, the following is more me just talking and thinking to myself. I hope you have an excellent rest of your day.
Another calculator I was recommended called pc part picker shows an approximate draw of 334W with my current desktop build. with the rx 560. newegg was saying around 600w would be good PSU range with curren but my current PSU in it came with is only rated at 450 so IDK. Adding 115W on top of that is my estimated difference between p100 max draw and rx550 running . The 1070ti I have in other desktop has an expected draw of 150W. Adding that on would probably be on the 800w side?.
Theoretically my current 450w PSU could handle p100 maybe but 50w overhead is slim. guesstimated around 500-600watts, IDK I think 750 will be fine The nvidia provided manual shows this kind of adapter connection to power the tesla as an option
Im just not sure if each of those pcie females on the adapter cable need their own connection to the power supply? I decided it might be worth a little more spend a little more on a name brand corsair that offers three of those pcie/cpu jacks. So does one outlet on the PSU go to CPU, another to the first female of that adapter, and the third slot to the second female of that adapter?
I saw that this PSU gives two different 6+2 pcie outputting cords, I don’t know what makes the 12v-2x6 to dual split cable different from the regular PCIE. Can I use that splitter cable to reduce the amount of PSU slots used to one cable?
