Is my psu too small for future upgrades?

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FwdMoparJunkie

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Feb 9, 2014
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Currently stock right out of the box. Plans include: adding (1) 140mm, (3) 120mm fans. Overclocking to 4.5ghz

Specs:
nzxt 410
darkpower 650w psu
780 ti
i7 3770k
hyper 212 evo
asrock z77 extreme6
WD black hdd
SSD
Blueray combo drive
2 sticks 16gb





 
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markwp

markwp

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Jan 22, 2013
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You're right on the border with that. The 780ti needs a 600w psu and the one you have is a good solid supply. You should be ok, but personally, I like to have a little headroom when I build. If you are not planning to go SLI, I think you will be fine.

Mark
 
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FwdMoparJunkie

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I figured I would be borderline. For now, I'll just add the fans and not oc until I get the 850W version. Just to be on the safe side. I want to do a raid setup anyways. Maybe some other stuff too.
 
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tsnor

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Nov 20, 2008
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http://www.hardwaresecrets.com/article/be-quiet-Dark-Power-Pro-10-650-W-Power-Supply-Review/1568

Nice PSU. no problem delivering clean power to that config. Make sure that the connectors for the 780ti come from DIFFERENT wires, your PSU has 4 different rails. When the 780ti is pulling power you want two rails providing it. (although there was a note saying you coulds configure the psu to use a single rail.)

p.s. A kill-a-watt meter ($20 amazon) or a UPS with a display will show you are no where near needing the 850.
 
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FwdMoparJunkie

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There's a jumper that you can plug in to make a single rail. I only need to plug one y cord into the gpu instead of both y cords. right? My motherboard doesn't have a pci express power option.

So in a nutshell, if I did sli, I could still use this very same psu. Just switch it to a multiple rail setup?
 
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tsnor

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"..So in a nutshell, if I did sli, I could still use this very same psu. Just switch it to a multiple rail setup?.."

The multi-rail setup is a safety thing. It limits the power any one set of connectors (rail) can pull. The downside to running as separate rails is one connector can be low on power while another connector can have power to spare but the extra power is not shared. With SLI where you are looking to using a good percent of the PSU you'd leave the PSU configured as a single rail and get the most out of a single shared pool of wattage. I'd run your PSU in a single rail configuration, I've never understood the safety value of the separate rails.

Aside: Your system as configured will top out between 350w and 450w assuming mild OC of your i7 3770k. SLI (2X 780ti) will push you closer to the 650w PSU than I would run if you OC. http://techreport.com/review/25611/nvidia-geforce-gtx-780-ti-graphics-card-reviewed/11 http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/63987-nvidia-geforce-gtx-780-ti-3gb-review-11.html
 
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markwp

markwp

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Jan 22, 2013
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The kill-a-watt measures power use from the wall not from the psu. While there may be some correlation between amps used at the wall and amps required at 12v dc from the psu, your statement is misleading.

 
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tsnor

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Nov 20, 2008
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Misleading? How so? In this case the OP will see a 400W peak (give or take). You know that the efficiency of this PSU is 85% in this range, so you know that the actual draw from the PC parts is (400 x 0.85 = 340w). EITHER the 340W number or the 400W number will work just fine to show OP that his PC is well under the limit of the 600W PSU. You also know that nearly all sites including tomshardware.com report total system power usage at the wall in their video card reviews (some then infer the graphic component of power mathematically) which is exactly what a kill-a-watt measures.
 
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