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post #21 of 50
A 450 watt Power Supply and drawing 432 watts from it ??? That is seemingly running a system at 96% of a Power Supply's rated maximum. However, in the real world, a system drawing 432 watts would ideally use an 850 watt Power Supply. Simply because maximum efficiency occurs about 50 % loading. Just check the efficiency graphs for the PS tests and you will see where maximum efficiency peaks. As the efficiency reduces, there is an increase in heat, wastage of power, higher running costs and reduced reliability.
post #22 of 50
Quote:
Originally Posted by daMystery1 View Post

A 450 watt Power Supply and drawing 432 watts from it ??? That is seemingly running a system at 96% of a Power Supply's rated maximum. However, in the real world, a system drawing 432 watts would ideally use an 850 watt Power Supply. Simply because maximum efficiency occurs about 50 % loading. Just check the efficiency graphs for the PS tests and you will see where maximum efficiency peaks. As the efficiency reduces, there is an increase in heat, wastage of power, higher running costs and reduced reliability.

Your assumption is that a 450W PSU is rated for what it draws from the wall. You are incorrect; the 450W rating is what it can deliver as output.

As you can see from the 80plus test, at full load the the ST45SF pulls 534W from the wall.
cq. http://www.plugloadsolutions.com/psu_reports/SILVERSTONE_SST-ST45SF_ECOS%202052_450W_Report.pdf

Edit for further information: Here is a review where the test hardware was overclocked to draw 530W from the wall and the system was left for 24hours. Peak draw was 550W and voltage droop was only 0.17V.
http://vr-zone.com/articles/vr-zone-exclusive-silverstone-sst-st45sf-450w-sfx-psu-reviewed/8805-2.html
Edited by WiSK - 10/2/12 at 6:06am
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post #23 of 50
If mITX is even an option I'd blindly take the SG08 or Node 304. I'm almost sure I'll go into mITX next year just because hahahah biggrin.gif and that includes ditching my $200 Xonar ST and paying $200 extra for motherboard. Thats how much I want to go mITX
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post #24 of 50
Quote:
Originally Posted by WiSK View Post

Your assumption is that a 450W PSU is rated for what it draws from the wall. You are incorrect; the 450W rating is what it can deliver as output.
As you can see from the 80plus test, at full load the the ST45SF pulls 534W from the wall.
cq. http://www.plugloadsolutions.com/psu_reports/SILVERSTONE_SST-ST45SF_ECOS%202052_450W_Report.pdf
Edit for further information: Here is a review where the test hardware was overclocked to draw 530W from the wall and the system was left for 24hours. Peak draw was 550W and voltage droop was only 0.17V.
http://vr-zone.com/articles/vr-zone-exclusive-silverstone-sst-st45sf-450w-sfx-psu-reviewed/8805-2.html


No, I was not referring to what load in Wattage the Power Supply could, draw from the wall. Many Power supplies can output more than their rated wattage, some substantially more. My comment was referring to operation towards peak EFFICIENCY (wattage) - and that peak
efficiency of many Power Supplies occurs around 50% loading.
Many apologies if my comment was misconstrued.

Having viewed the linked reviews, I note from the graph/s that PEAK efficiency occurs somewhere around 45 %, straight lines to around 55% -at which it delivered 85% efficiency - and then falls away to an eventual 82% efficiency at maximum output. While I concede that the drop from maximum efficiency is only 3% at maximum output, and substantially better than many, the PS components are still becoming more highly stressed as loading is increased . Especially, with the fitment of less than optimal Teapo 85 degree capacitor/s to the unit in question. I prefer to have my PC operate somewhere within PEAK output. While more expensive to purchase the initial Power Supply, it should hopefully be rewarded in more stable voltage/s, ripple, minimal heat, less hardware failures and cheaper power bills.
post #25 of 50
You also need to consider how you will be running the system. Would an 850W be ideal with a 432W system? Maybe if you're folding and running it 100% 24/7. The fact of the matter is that maybe 70%+ of the time, it'll be running idle. Unless you turn off your computer. Even still, running at 100% of the system is not something that happens pretty much ever.
     
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post #26 of 50
Thread Starter 
Small update: I've just got the case(ordered an arc mini), but it is surprisingly big, I knew that it was going to be big, but it surprised me nevertheless. I think I'm gonna keep it and order the Maximus V Gene. It seems like a good quality case. I might be changing the case into a smaller one in the future, but I don't know when that time will come. Between u guys, which card should I pick? 670 or 680, and which brand. I've had a look at the EVGA FTW 670, asus DCII TOP 670 and the gigabyte windforce 670. All of them seem like amazing cards, but I'm not sure if I should be getting an external or internal blower, considering I might be moving the card to a smaller case or using it as sli later on. Too many choices!
I'll be using a triple screen setup at 5760x1080, I don't really know how much I'll be gaming over 3 screens though, but I want to keep the option open.

I know that this is a little bit off topic, sorry.
post #27 of 50
I would go with a 680 4gb if you are gaming on triple monitor. You could use the extra vram.
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post #28 of 50
Thread Starter 
Quote:
Originally Posted by NewHighScore View Post

I would go with a 680 4gb if you are gaming on triple monitor. You could use the extra vram.

why not the 670 4gb?tongue.gif
post #29 of 50
Quote:
Originally Posted by glyph0reo View Post

why not the 670 4gb?tongue.gif

Well considering 680 was in your original option why not the 680? It's that much better then the 670 and you are going to be gaming at an extreme resolution. Personally with the total cost of your gaming setup I wouldn't skimp out on the 100 dollars.
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post #30 of 50
Thread Starter 
Quote:
Originally Posted by NewHighScore View Post

Well considering 680 was in your original option why not the 680? It's that much better then the 670 and you are going to be gaming at an extreme resolution. Personally with the total cost of your gaming setup I wouldn't skimp out on the 100 dollars.

except the price difference where I'm from is more like 200-250 dollars, add another 100 for the 4gb version.. Is the 680 really worth that much, in terms of performance?
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