best 750W and quiet

X

xorbe

Supreme [H]ardness
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Sep 26, 2008
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Just discovered my 520w Seasonic can pull 620w from the wall (prime + heaven) ... it needs more headroom than that. Hit me with the best of the best suggestions. Typical boring setup in signature. NE has 1,591 power supplies!
 
Well what video card do you have?

Unless you were using an expensive tool to measure power draw, that 620W figure is more than likely wrong.
 
Dangman said:
Well what video card do you have?

Unless you were using an expensive tool to measure power draw, that 620W figure is more than likely wrong.
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Titan X with bios mod. It's in my sig as stated in first post.
 
xorbe said:
Titan X with bios mod. It's in my sig as stated in first post.
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Then yeah, unless you have 12+ hard drives in that system, I'm not seeing a good reason for you to upgrade your current PSU. Even with the TItan X, a heavily OC'D 4790K and a hard drive or two, you're looking at around 450W.
 
Man, once you start reading JonnyGuru website, it's hard to escape.

One reason I want to "over-buy" is the report from Tom's that shows a 250W average gpu actually pulls 125-375W in smaller time slices. The cpu is probably more of the same, digital in nature and all.
 
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xorbe said:
Man, once you start reading JonnyGuru website, it's hard to escape.

One reason I want to "over-buy" is the report from Tom's that shows a 250W average gpu actually pulls 125-375W in smaller time slices. The cpu is probably more of the same, digital in nature and all.
Click to expand...

There are websites out there that measure not only average, but peak wattage. it's typically not that much higer than the average. See here for your Titan X:

http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_Titan_X/27.html

Difference between average and peak in Metro : Last Light = just 20w (223w versus 243w), and the maximum during Furmark is card-limited to 275w..


So, no need to worry about any crazy power spikes. Chips these days are controlled to hell and back, in order to get the most out of them.
 
More fine grained like this. Average looks around 275w but perhaps 420w momentary spikes.

17-Gaming-Detail-Power-Consumption-Overiew.png
 
Overclocking anything throws your power use assumptions out the window. A specified TDP on a major component could easily double on what you may think is a mild overclock, and the OP somehow measured that they are pulling 620W from the wall (I assume a Kill-A-Watt or a UPS that has a readout). Even accounting for PSU efficiency, and without accounting for PSU degredation due to age, that's overloading the existing PSU.

So yeah - to all those posters saying you should be fine and your over-doing it on your PSU - I agree with the OP, time for a new PSU. I can't yield any better recommendations other than whatever passes the testing on reviews here though.
 
80+ Bronze PSUs are about at most around 85% efficient. That's 527 watts being pulled from the PSU assuming near top efficiency, which it won't be at. Additionally, active PFC of these power supplies have been known to screw up Kill-A-Watt readings.

Increasing frequency on it's own only linearly increases power consumption. Thus, a 4790K at 4.5 ghz with no voltage increases is likely pulling only around 100-120 watts. Overvolting is what massively increases power consumption. A Titan X at stock is around 250 watts.

If it's time for a new PSU, it would only be because the old PSU is getting old, not because more wattage is required. Unless massive overvolting is planned, or SLI is planned.
 
This is the first time a "sold and fulfilled by Amazon" item hasn't shipped by its delivery date for me. 11 days and counting! C'mon SS-860.
 
Finally got the SS-860 installed. It's so quiet compared to the old SS-520!
 
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