Question about PSU Wattage

XxAkenoxX · Apr 23, 2014

I am planning to build this http://pcpartpicker.com/user/xxakenoxx/saved/4lAE
A person from reddit recommended that 750W PSU for future upgrading like SLI/adding another gtx 770.
However, I have an old PSU http://www.newegg.com/Product/Product.aspx?Item=N82E16817171039 .
Will this PSU be fine until I upgrade or is it also good for sli?
Also, I would like your opinions on what other PSU you guys would recommend for me for having one gtx 770 and/or sli.

Thanks!

Zucchini28 · Apr 23, 2014

750w should be good for sli. I would recommend the seasonic m12ii 750w.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151107

hunter315 · Apr 23, 2014

It is definitely not good for SLI, the eXtreme Power Plus PSUs are all grossly overrated. The 600W variant went out of spec at 80% of tis rated load during the HW secrets review.
http://www.hardwaresecrets.com/article/Cooler-Master-eXtreme-Power-Plus-600-W-Power-Supply-Review/1034/1

From their conclusions:
"Why manufacturers like Cooler Master are still carrying power supplies with fake wattages is a mystery to us. We know that is is a very low-end power supply, but this doesn't give the manufacturer the right to lie. This unit should be labeled as a 450 W unit and sold for half of its price. [...] If you pull more than 450 W from this product, it will offer real risk to your computer, plus it provides poor efficiency, between 69.2% and 77.6%."

I would step up the PSU you currently have listed. The CX series is alright, but its not great and if you are intending on doing SLI and OCing the extra capacity and aging potential provided by a better unit is worth it. For $20 more you can pick up a full modular XFX unit
http://pcpartpicker.com/part/xfx-power-supply-p1750bbefx

XxAkenoxX · Apr 23, 2014

awesome!
Is my old psu capable enough to handle one gtx 770 and the rest of the build?
If so, I can settle for that now and buy other 770 and upgraded psu later.

Dark Lord of Tech · Apr 23, 2014

A high quality 750w will do the job here's a nice one.

Seasonic made \ Gold Certified \ Full Modular.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: XFX ProSeries 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($99.99 @ NCIX US)
Total: $99.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-04-23 20:48 EDT-0400)

XxAkenoxX · Apr 23, 2014

hunter315 :

It is definitely not good for SLI, the eXtreme Power Plus PSUs are all grossly overrated. The 600W variant went out of spec at 80% of tis rated load during the HW secrets review.
http://www.hardwaresecrets.com/article/Cooler-Master-eXtreme-Power-Plus-600-W-Power-Supply-Review/1034/1

From their conclusions:
"Why manufacturers like Cooler Master are still carrying power supplies with fake wattages is a mystery to us. We know that is is a very low-end power supply, but this doesn't give the manufacturer the right to lie. This unit should be labeled as a 450 W unit and sold for half of its price. [...] If you pull more than 450 W from this product, it will offer real risk to your computer, plus it provides poor efficiency, between 69.2% and 77.6%."

I would step up the PSU you currently have listed. The CX series is alright, but its not great and if you are intending on doing SLI and OCing the extra capacity and aging potential provided by a better unit is worth it. For $20 more you can pick up a full modular XFX unit
http://pcpartpicker.com/part/xfx-power-supply-p1750bbefx

Oh man! Thanks for this. I didn't know my old psu was bad haha
I guess in the long run it'll be good to buy a great psu now than later.

Thanks!!

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Question about PSU Wattage

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