x7200 single or dual PSU

I dont know if this has allready been answered. BUt the math is simple.
LGA 1366 cpu=130W
SIngle GPU1=100W
Single GPU2=100W

Total = 330W.

And a single PSU is only 300W.
I know for a fact that if one use a lga 1366 cpu, even an extreme one and 2 100W gpu without overcloking the 300W single PSU is enough.

What does this mean ?
1)THat the psu can output more than 300W ?
2)That the second GPU doesnt consume more than 100W in load ?

I havent asked myself thse questions since my 460m consume 75W each (75*2+130=280W obviously less than 300)

But what if i replace them with 2 100W gpus. How is that going to work? ; because ppl say it does, and i just want to understand how.
Not to mention there are other things besides gpus and cpu that need powering ?

I also heard that mxm3.0b somehow can use 130W per gpu, and that this is suppose to be something new from clevo.
Is this something the x7200 can handle if it has enough power (say add a second psu ?)

 

it can do up to 400w, as long as you managed to keep it cool

 

LOL really ? And why is it specified at 300W then ? SHouldn,t it be called 400W PSU then?

Now i baffled still.

What does it mean, keep it cool ? It does get pretty hot. i must admit.

 

300w should be ok from official site, 400w CAN be ok, but not guaranteed.
One or more of the resellers confirmed that it can at least take 330w (don´t know where and when though).
It´s just like a GPU/ CPU - they are clocked so and so, but you can overclock it in many cases.
Keeping it cool because of overheating - just like your CPU/ GPU etc.

 

I want to mention the dual PSU solution which is available for the x7200/NP7280, just in case someone hasn't heard of it.

 

I am baffled to say the least. Its like sazing i bought a 600W PSU, but it can do 800W if you keep it in the fridge. AND believe me when i say that, i have never heard of such a thing.

So which one is it ? 300 or 400 ?

 

its rated to safely operate at 300watts in many more extreme conditions, but if it is cooled properly it can output up to 400watts, so basically dont have it sitting outside in the sun and you should be fine.

 

So when the initial tripping issue was discovered, that was happening because sistem, through full load (prime 95 12 thread and furmmark) was drawing more than 400W, or because the psu overheated ?

 

probably it was more that 400W and then if it hadn't switched off, it would have began to overheat.

 

Mainly the GTX 480m caused this problem. It seemed to be very "power hungry"

 

As far as I know, 100W is the maximum TDP of the MXM3.0b board they use, at least for now. I could be wrong though, but that should mean that the cards cannot eat over 100W on their own. PSUs often push out more than their listed wattage. The listed wattage is the guaranteed minimum output of the PSU; does not mean it's incapable of pushing out more, just that it isn't guaranteed.
As for the heat, I think he meant the heat of the Power Brick. Mine does get very hot, though I've been told how I could possibly mod it to help, but I don't have the tools with me, so I never did it.

On a side note, some places are jerks and market them as their max possible output, and in smaller print will list its guaranteed one. I had my boss buy a 600W PSU for his wife's PC and when it arrived, the PC kept crashing. When he looked at the PSU closer, it stated "500W guaranteed, 600W maximum". It was a pain for him to return it for a money-back, as it was internationally bought. So be careful when asking what a PSU can do.

 

From experience with the x7200 in my sig, a single PSU absolutely will trip after gaming or benching for a period (normally after 2-3 runs in vantage) with a heavy OC. I've been able to trip both my PSUs separately when running them by themselves. I also keep my PSUs in a cool , well-ventilateed spot.

 

well you could add some fans to them, or use one of those passive cooling pads that absorbs the heat, to keep them cool.

 

Really strange thing with the PSU´s - did some overclocking with my GTX 485m´s as far as I can go and overclocked the 970, too... at the same time - did it once more and so on, never got a PSU trip...
Maybe it´s kind of luck, some PSU´s doesn´t trip as fast as others...

 

A couple resellers lost my business because they were unaware and/or insisted against the need for dual PSU's with 990x and two 485's. With a single PSU it will trip from everything I read.

 

Was this power hungry 480m sucking more than 100W ?

Cause if it did, that would contradict the first quote. If it didn.t that would mean it would be beneath 100W and it would contradict the second quote.

So who is right ?

Tirenz, you seem to be from Berlin. I live in germany also. Is there a way we can get a watt measuring gerät here in germany ? Like the kill.o.watt unit some ppl use ? I.m curious to see how much power my laptop uses on full throttle.
http://www.p3international.com/products/special/p4400/p4400-ce.html
Of course we need a version with european power plug

 

Power supplies are inefficient, 80+ Certification means you put in 100 watts ac and get ~80+ dc watts, which is the high, most aren't even that efficient. What happens to those other 20 watts? HEAT. Entropy. Moreover, the hotter your psu gets the less consistent the current becomes, which is not good for those highend components...

A 300watt RATED psu can handle more than 300 watts, it just isn't made to do that on a long term basis. A decent system builder would err on the side of caution and use something greater than the expected draw from the pc for consistent power. But there are costs to consider.

TDP (thermal design power) is a technical estimate of what you will encounter through whatever the manufacturer decided constitutes real-world use. It is NOT the maximum theoretical power the part will draw. And it's not always even comparable to other manufacturers' numbers.

This is all a lot less exact than it's been made out to be. Don't forget, your ram + that LCD (even if LED) + any usb peripherals + wi-fi + chipset + HDD (or multiple HDDs).

 

I did say I could be wrong... haha. If I am, I'll accept it, but that's what I thought was the case. What I did say about the PSU is right though, they will almost always push beyond their rated wattage, just it's not guaranteed =). Better cooling helps too.

 

@Bytales:
Do you mean something like that?
Hinkel - SHOP: Energieverbrauch, Energiekosten, Leistungsmessgerät - UPC 12..., Einbaubuchsen, Montageflansch, bis max 2 A, FEP / Silikon-Schaltlitzen, hochflexibel, Kabelbinder mit Doppelverschluss, schwarz, Breite: 9 mm, MSM..., National Z 55 SYSTE
I think in "Baumärkten" there should be some of them, too.

I only remember from reading that the people had the most problems with tripping with the 480m. Some resellers said that, too. The 480m was not as power optimized as the 485m.
From my experience, there is no tripping, neither with the 485m SLI nor the 6970m crossfire. And to tell the truth, I even didn´t pay attention to keep my PSU cool...