noob: Power supply, home wiring and safety

[eco_bach]

Building a 3GPU (3XTitan Xp's) PC for rendering. Based on initial research I guestimate almost 1000W under maximum load when rendering.

https://outervision.com/power-supply-calculator

Since I'm a total noob when it comes to things electrical and also because I live in an older building (no fuses, just circuit breakers) I thought it best to ask for feedback on safety.

Does 1000W sustained over long intervals (8-24hrs) pose any risk to typical, or even older home wiring?
I checked the circuit breaker box and can only see a rating of 100amp at the top of the box, nothing listed I can see at first glance, for individual switches.

 

[||Console||]

Branch ccts for plugs will be 15amps (really only 12 80% of 15) so you have 1440w available from a 15amp cct total . So depending on what else is on that cct you should be fine .

a new 20 amp cct would let you have 1920

 

[trents]

You might want to look at getting a hefty UPS just in case you trip breakers to allow you to gracefully shut the system down.

 

[RJ88]

Branch ccts for plugs will be 15amps (really only 12 80% of 15) so you have 1440w available from a 15amp cct total . So depending on what else is on that cct you should be fine .

a new 20 amp cct would let you have 1920

oh he's fine....alot of the old stuff was still done well..and that usual smaller places 100-125a box plenty...why they put alot 20s in you can trip a 15 running bunch **** on it, it;s still pretty hard though lol

 

[||Console||]

oh he's fine....alot of the old stuff was still done well..and that usual smaller places 100-125a box plenty...why they put alot 20s in you can trip a 15 running bunch **** on it, it;s still pretty hard though lol

pretty easy over 1500w will trip =)

 

[RJ88]

pretty easy over 1500w will trip =)

Just need a dedicated line, hell go with one of those nice 30s lol....it's just how they did it with rooms you know lol...kinda bad like if the kitchen and living room/quarters some plugs on that same line or something, and that's been done many a times lol,

 

[||Console||]

Just need a dedicated line, hell go with one of those nice 30s lol....it's just how they did it with rooms you know lol...kinda bad like if the kitchen and living room/quarters some plugs on that same line or something, and that's been done many a times lol,

as an electrician i can tell you that it doesnt matter if it is decacated or not once the total load of the cct is over the breaker rating it will trip .

 

[RJ88]

as an electrician i can tell you that it doesnt matter if it is decacated or not once the total load of the cct is over the breaker rating it will trip .

Yeah it shouldn't really matter and never been any real difference...but you just still don't like the idea of other junk running on it too and with it lol

 

[trents]

Few if any of us have a dedicated circuit just for our computers.

 

[||Console||]

Few if any of us have a dedicated circuit just for our computers.

I do =)

 

[JrClocker]

3 Titan Xp cards is going to draw more than 1000 W if your CPU is doing anything.

My "The Sith" system below has 2 Titan Xp cards and 5820 K CPU...all are overclocked.

While running Folding@Home on just the 2 graphics cards, the PSU draws 850 W from the wall...that's 2 of 12 threads running folding@home, and both GPUs running hard.

I put my system in your PSU calculator link, and it says I need a 1300 W PSU for 3 Titan Xp GPU system...with the CPU running at 90%.

My PSU is a 1000 W unit...Titanium rated as I leave the PC on 24/7.

 

[deathman20]

Few if any of us have a dedicated circuit just for our computers.

15amp circuit dedicated to my PC hardwares. Think maybe a few lights might be on the circuit (100W at most) otherwise its all PC gear oh and a air freshener

Though with a high consumption like that I'd almost pair for a dedicated line of at least 15amp, but with other equipment in the PC (CPU, Fans, HDD, Monitor) you might get close to the safe limit for a 15amp circuit. 20amp line would be safer in the long run, or at very least a 15amp breaker on running 12-gauge wire (20amp rated). Bigger wire keeps it cooler. Just my opinion on it at least as I'm not an electrition but I do a lot of home improvement projects on my own with a safety factor and a bunch of research in advance... besides running it past a few professionals I know at least.

 

[||Console||]

15amp circuit dedicated to my PC hardwares. Think maybe a few lights might be on the circuit (100W at most) otherwise its all PC gear oh and a air freshener

Though with a high consumption like that I'd almost pair for a dedicated line of at least 15amp, but with other equipment in the PC (CPU, Fans, HDD, Monitor) you might get close to the safe limit for a 15amp circuit. 20amp line would be safer in the long run, or at very least a 15amp breaker on running 12-gauge wire (20amp rated). Bigger wire keeps it cooler. Just my opinion on it at least as I'm not an electrition but I do a lot of home improvement projects on my own with a safety factor and a bunch of research in advance... besides running it past a few professionals I know at least.

Not only does it keep it cooler It is required by code for a 20amp cct to have #12 , #10 for a 30a . If you are even thinking about doing this run #12 /20a as it cost pennys over a 15a/#14

 

[Alaric]

Few if any of us have a dedicated circuit just for our computers.

My audio gear is, but it's hooked up to my PC (which is on a separate breaker).

 

[eco_bach]

3 Titan Xp cards is going to draw more than 1000 W if your CPU is doing anything.

My "The Sith" system below has 2 Titan Xp cards and 5820 K CPU...all are overclocked.

While running Folding@Home on just the 2 graphics cards, the PSU draws 850 W from the wall...that's 2 of 12 threads running folding@home, and both GPUs running hard.

I put my system in your PSU calculator link, and it says I need a 1300 W PSU for 3 Titan Xp GPU system...with the CPU running at 90%.

My PSU is a 1000 W unit...Titanium rated as I leave the PC on 24/7.

850W seems very high for only 2GPUs!
I have 1 Titan Xp and 1 FTX1080 (and identical PSU) and doing a GPU render with both cards at 98+% I'm seeing around 450W at peak load, tested on 2 different power meters, which equates to roughly 175W per card.
Adding a 3rd card pretty sure I will rarely break 600W.
Maybe something to do with overclocking?

 

[JrClocker]

850W seems very high for only 2GPUs!
I have 1 Titan Xp and 1 FTX1080 (and identical PSU) and doing a GPU render with both cards at 98+% I'm seeing around 450W at peak load, tested on 2 different power meters, which equates to roughly 175W per card.
Adding a 3rd card pretty sure I will rarely break 600W.
Maybe something to do with overclocking?

The Titan Xp cards are 250 W TDP. I have the "power" slider set to 120%, which brings it to 300 W TDP per card...and the cards are overclocked (2050 MHz or higher on GPU frequency sustained).

I have this system draw its power directly from a UPS, and this UPS has a built in power meter showing how much power it is sourcing to the load. As stated above, while running Folding@Home, the power draw from the wall is about 850 W.

Shrug - not debating, just stating facts.

 

[caddi daddi]

you will be pulling much less than 1000 watts from the wall.
all the rendering software i have seen is much less load than folding.
i would guess that my 2 1080's folding pull around 500 watts from the wall for the whole rig, rendering i would guess it should be around 100 watts less.
I'll plug it into the kill-o-watt tonight and find out.

 

[caddi daddi]

2 1080's rendering a blender/cycles render, kill-o-watt shows 375 watts









2 1080" folding kill-o-watt shows 470 watts, max packet size small.
525 watt max packet size big.


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