750w Or 850w PSU For Multi GPU Build?

redhagrabcar · May 19, 2018

Hi. Im planning to build a workstation PC for 3D Rendering. The system will be OC-ed occasionally. Below are the specs

ryzen 2700x
BeQuiet! DRP4
x470 RGB mobo
32-64GB RAM
250GB SSD
2TB HDD
Casing with 4 RGB fans
no optical drive

As for the GPU, right now Im only planning to install 1 first which is the GTX 1060 6GB. In 1 year time I'll be adding another GPU. Probably higher-end like 1070ti or 1080

So I want to choose a futureproof PSU sufficient to handle 2 GPUs, while capable for whole system OC use. Which 1 should I go for, 750w or 850w? Would you recommend any brands?

PuperHacker · May 19, 2018

If you are going to render for a lot of time per session, you need a trustable PSU with sufficient wattage.
This: https://www.amazon.com/Corsair-RM850x-Modular-Supply-CP-9020180-NA/dp/B079H5WNXN/ref=sr_1_5?ie=UTF8&qid=1526720441&sr=8-5&keywords=850w+power+supply is my recommendation for 850w, which is a future proof solution and will handle 2 GPUs.
NOTE: In 1 year's time, the Nvidia 11xx series will have arrived, so you shouldn't need a 1080.

redhagrabcar · Jun 4, 2018

I just found out from this Cooler Master PSU calculator site http://www.coolermaster.com/power-supply-calculator/ that the best CPU Wattage if I'm going to add up another GPU in the future, making a (1060+1080ti+other hardware listed above) rig + while overclocking, then I would need a 1000W PSU as recommended. If i'm only using single GPU, then an 850W is sufficient.

Edit: 1060+1060 while overclocking my CPU. 850W is doable

turkey3_scratch · Jun 4, 2018

redhagrabcar :

Don't be deceived by those calculators, they're pretty wrong and unclear, the Cooler Master one especially. Not that you can't get a higher wattage power supply than you need, it won't hurt, but they surely make people spend more money they don't really need to spend.

Two GTX 1060s would be 240W together (just the GPUs). A 1080Ti + a GTX 1060 should be somewhere around 375W when both are loaded. Of course you can then calculate additional increase for overclocking and stuff, but this is stuff I know from real reviews on these GPUs, Cooler Master calculator just wants you to buy their more expensive power supplies.

redhagrabcar · Jun 4, 2018

turkey3_scratch :

Really?! Man, I was fooled.

ElectrO_90 · Jun 4, 2018

If you are going to get the Corsair PSU get the ones that allow you to monitor the power - I use a HX850i , never gets over 600 watts with R9 390x and Rx 580 - and these cards draw more than Nvidia

redhagrabcar · Jun 4, 2018

ElectrO_90 :

Thanx for the advice. I specifically choose 1060 and wanting to upgrade to 1080ti in the future cause both are the low-end and high-end recommendation from Lumion 8 developer themselves.

Is it OK if i get the CoolerMaster V850? cause visually it seems like a good pair with their CM MC500M casing, well at least for me they do. I don't know whether V850 has monitor like the mentioned HX850i

Edit: Is monitoring power that crucial?

ElectrO_90 · Jun 4, 2018

Not crucial, but its nice. Better products are better. The V850 is an old model?
https://www.tomshardware.com/reviews/best-psus,4229.html

redhagrabcar · Jun 4, 2018

ElectrO_90 :

Thanx for the advice

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