Can I use 505W on a 500W Power Supply?

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samiraziz5th

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I am upgrading my gaming/CADing rig to accommodate mining. The parts the finished build will include are: 1070 Ti, 1050 ti, i5-8600K, 32GB ram (4x8GB 2133Mhz DDR4), fans, lights, ssd, 2 1080p monitors, and 1 2K monitor. Using the website PC Part Picker, the estimated wattage is between 174W and 505W. The build I am upgrading has a EVGA Bronze 500W power supply. Is this enough to comfortably mine and game at the same time or will I experience crashes. Additionally, does anyone have experience with the amount of heat generated by 2 GPUs in a closed case, fan cooled system? Thank you.

PS. If this power supply is not enough, or there is likely going to be too much heat, can anyone suggest another way to design a rig built for gaming, mining, and CADing? Preferably, I could keep as many parts from my current system as possible.

My current system is:
https://pcpartpicker.com/b/WwHhP6

The ideal upgraded system is:
https://pcpartpicker.com/user/wama_2/saved/#view=qBjnHx
 
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geofelt
I would not.
Normally a build with a GTX1070ti is recommended to have a 550w psu.
http://www.realhardtechx.com/index_archivos/Page362.htm

A GTX1050ti will run on slot power only, so that is perhaps 75w more.

You have a expensive setu there with good parts.
I think it is foolish to go cheap on the psu.
If your will be mining, the psu should probably be a gold rated one to improve your economics.
Seasonic focus gold 650w would be my suggestion.
https://www.newegg.com/Product/Product.aspx?item=N82E16817151186

One other potential issue:

Looks like you are trying to add 3 8gb sticks to your existing 8gb to get 32gb.
That may very well not work.
Ram is sold in kits for a reason.
A motherboard must manage all the ram using the same specs...
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Barty1884

Barty1884

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An i5-8600K + 1070TI system is going to draw ~300W before overclocking. Not sure where 505W comes into it?

While wattage shouldn't be a concern here, the 500B is a very budget-oriented unit, and I wouldn't recommend running a shiny new 1070TI from it.

The near (2015 or 2017) CX units from Corsair are solid, as are the TX.

The CX650 is $40 after rebates, if you're ok with them.
https://pcpartpicker.com/product/3F2rxr/corsair-cx-2017-550w-80-bronze-certified-atx-power-supply-cp-9020122-na

Or, if you want a 'top tier' unit, the Focus+Gold 550W from SeaSonic is a pretty good price at $70.
PCPartPicker part list / Price breakdown by merchant

Power Supply: SeaSonic - FOCUS Plus Gold 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($69.00 @ Newegg)
Total: $69.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-10-01 16:59 EDT-0400
 
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Eximo

Eximo

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So you want to take a power supply, and presumably, when you aren't around run it over capacity? What could go wrong...

If you are lucky it will overcurrent or overtemp and shut itself off. If you are unlucky it will fail, destroy your equipment, or start a fire and burn down your dwelling.

The amount of heat generated by the components is given in Watts. A 1070Ti and a 1050Ti between them equal 255W rated power consumption. Imagine four 60W incandescent light bulbs. So their cooling solutions will need someway to exhaust the heated air. Ideally you have many case fans providing adequate intake and an exhaust fan or two to keep things flowing.

The simple way to design a rig is to select a power supply that can exceed the demands you place on it. Ideally you want to stay between 50% and 80% power consumption on a power supply to keep the efficiency at the best point. Which when mining is really the most important things. In this case an 750W-850W is probably about right.

Using a Bronze 85% efficient supply in place of something closer to 90% efficient, like platinum or titanium rated isn't great, unless your electricity is free.

Though I find the whole mining thing a huge waste of natural resources myself. Profit based on the production of nothing...only consumption. Even when using green sources of power you are preventing that power to be used for something productive.
 
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Eximo

Eximo

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He is also running the 1050Ti for the purposing of mining. So full blast on the GPUs for hours at a time. It would probably burn out quite quickly if it didn't have protections. Not sure how good they are on that model, but not worth finding out the hard way.
 
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Barty1884

Barty1884

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Yeah, I missed the 1050TI's presence.

Realistically, either PSU I linked would do the job.
Not necessarily the 'best' ideal - although mining on a 1070TI and 1050TI would also fall into the same category :lol:

Agreed though, a quality ~750W range unit would be the best idea here.
 
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geofelt

geofelt

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I would not.
Normally a build with a GTX1070ti is recommended to have a 550w psu.
http://www.realhardtechx.com/index_archivos/Page362.htm

A GTX1050ti will run on slot power only, so that is perhaps 75w more.

You have a expensive setu there with good parts.
I think it is foolish to go cheap on the psu.
If your will be mining, the psu should probably be a gold rated one to improve your economics.
Seasonic focus gold 650w would be my suggestion.
https://www.newegg.com/Product/Product.aspx?item=N82E16817151186

One other potential issue:

Looks like you are trying to add 3 8gb sticks to your existing 8gb to get 32gb.
That may very well not work.
Ram is sold in kits for a reason.
A motherboard must manage all the ram using the same specs of voltage, cas and speed.
The internal workings are designed for the capacity of the kit.
Ram from the same vendor and part number can be made up of differing manufacturing components over time.
Some motherboards, can be very sensitive to this.
This is more difficult when more sticks are involved.
That is why ram vendors will NOT support ram that is not bought in one kit.

I suggest you buy a 2 x 16gb kit and keep your 8gb as a spare or sell it.

Lastly, if you want to put a good overclock on the 8600K, get a stronger dual tower cpu cooler like the noctua nh-D15s.
 
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samiraziz5th

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Thank you for your help. I will look into getting a 750W PSU for my new rig. Out of curiosity, would this setup work if I only used 1 GPU at a time? For example, use the 1070 Ti when gaming and have the 1050 Ti off, but otherwise have the 1070 Ti off and the 1050 Ti mining. The reason why I am not using the 1070 Ti for mining is I read that using the GPU at full power for excessive periods of time wears down the component much faster.
 
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samiraziz5th

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Thank you. I did not realize that potential issue with the RAM. I likely will not overclock any of my parts as I am not very experienced in that and do not want to ruin my parts. Do you know what some of the potential consequences to having 3 sticks of RAM from the same company, part number, etc. but maybe different material as you suggested would be?
 
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geofelt

geofelt

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The potential consequence of mismatched ram is that it might not work at all or it might work with instability.
No damage will happen.
Intel is reasonably tolerant of ram and 2133 speed is the stock DDR4 speed.
You may not have an issue at all. I might guess perhaps 90% success.
But, why take a chance?
What is your plan "B" if the new sticks do not work properly together.
 
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samiraziz5th

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When I upgrade my RAM, I will probably just get a few 16GB sticks and replace my 8GB, I was just curious of the consequences. I would rather play it safe and not risk wasting money or hurting my components.
 
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TJ Hooker

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If you mine and game and the same time, which card will be used for what? You realize mining profits are basically non existent these days? Buying a 2nd card purely for mining is almost certainly a waste of money. If you really want to mine just do it on the 1070 Ti when you're not using it for anything else.
 
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geofelt

geofelt

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Buy a 2 x 8gb kit that matches the specs of what you have.
You will be guaranteed 16gb, and if the old stick plays nice you win and have 24gb.
 
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samiraziz5th

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I would mostly mine using the 1050 Ti. The mining isn't meant to be a main source of income or anything, just a way to make a few bucks here and there. I am living in a college dorm so electricity expenses are not a problem.
 
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samiraziz5th

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I happen to have a 150$ Best Buy gift card and found this RAM on their website. https://www.bestbuy.com/site/corsair-vengeance-lpx-16gb-2pk-8gb-2-133ghz-pc4-17000-ddr4-dimm-unbuffered-non-ecc-desktop-memory-kit-black/6256219.p?skuId=6256219. Although it is not the exact same model as the ram, do you think it has a shot at working with it so I can have the added benefit of the 24GB or do you think I should try to find a more similar 2x8GB set? This RAM has all the same specs except for the CAS latency (15 for the old one and 13 for the new one). This may seem like a silly question but I am still fairly new to this.
 
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TJ Hooker

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Oops, I missed the fact that you already have the 1050 Ti.

But you still have the opportunity cost of not selling the card. Based on today's prices, if you were able to sell the card for even 100 USD (I'm not sure what the used 1050 Ti market is looking like) it'd take you over a year to make that in mining, even with free electricity. Doesn't seem like it's worth the hassle.
 
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geofelt

geofelt

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Give it a shot.


 
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