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01-25-2013, 07:26 PM
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#1
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Junior Member
Join Date: Jan 2013
Posts: 20
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Power Supply Calculator
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01-26-2013, 03:09 AM
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#2
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Diamond Member
Join Date: Dec 2010
Posts: 7,322
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What for? There are plenty of PSU calculators out there that are not stickied. I don't see how this Asus calculator is any better, in fact it seems to have fewer options than Thermaltake's calculator, for instance. It seems to overestimate the needed wattage to compensate for bad quality units, just like all the other calculators.
Also, wattage isn't everything. What's more important is the amount of amps on the +12V rail(s), the number of connectors needed for your graphics card, and the quality and reliability of the unit.
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Asus P8Z77-V | i7-3770K @ 4.2GHz | Scythe Mugen 2 with Noiseblocker B12-3 @ 5V | 2x4GB Samsung 1333 | Sapphire 7950 1100/1450 | Asus Xonar DX | OCZ Vertex 2 120GB | Samsung F4EG 2TB | WD Caviar Green 1TB | Seasonic X-660 | Fractal Design Define R3 | Bitfenix Hydra Pro with Noiseblocker B12-3 fans | BenQ XL2411T | Sennheiser PC350 | Logitech G710+ | Zowie AM-GS | Zowie G-TF
Last edited by lehtv; 01-26-2013 at 03:12 AM.
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01-26-2013, 04:03 AM
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#3
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Platinum Member
Join Date: Mar 2011
Posts: 2,122
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The PSU calculator is slightly flawed. I matched the my specs and the calculator churns out a 400W requirement. Definitely could do with less but I find it fair as most PSUs that I purchase is a minimum of 500W. What's flawed is when I add in a single HD7970 and the wattage shoots up to 700W. You certainly do not need that much for a HD7970, realistically 550-600W is plenty.
The hilarious part is that the calculator allows me to account for two Core i5 3570Ks. I'd wish. 
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Intel Core i5 3570K [4.5GHz @ 1.28V]|MSI Z77A-GD65|Samsung MV-3V4G3D 16GB 1866MHz@9-9-9-24/1.35V|Powercolor HD4650|Corsair Force GT 120GB|Samsung F3 1TB|Corsair CX500|Corsair 400R|XSPC Raystorm + XSPC EX240 + EK DCP 4.0
Intel Core i7 2600|ASRock H61M/U3S3|Kingston HyperX 8GB|Intel HD2000|WD Blue 320GB|Samsung F4EG 2TB|WD Green 2TB|WD Green 3TB|WD Green 3TB|FSP SAGA II 500W|CM Elite 343 || TeAm
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01-26-2013, 05:20 AM
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#4
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Junior Member
Join Date: Jan 2013
Location: Moscow
Posts: 6
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The Asus one is one of the worst ones, for certain. Gave a system that runs fine on 520W PSU an 800W as recommended, instead. Hmm, come comes? Aha... Asus makes PSU as well. Make your conclusions, gentelmen.
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01-26-2013, 06:07 AM
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#5
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Golden Member
Join Date: May 2011
Location: UK
Posts: 1,993
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PSU calculators (all the ones I've seen) are fatally flawed. The only way of making them vaguely accurate would be to make a short list of decent PSUs / brands of PSU and run the tests using those, and have a disclaimer of "if you're not using a PSU on this list, you may as well be using a ouija board to calculate the answer to your question".
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01-26-2013, 12:26 PM
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#6
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Platinum Member
Join Date: Jun 2012
Location: Memphis, TN
Posts: 2,990
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XD said my pc requires 700W when it doesn't even break 600W barely 550W
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Gaming/HTPC: CM Storm Scout | AMD FX 8320 @4.5GHz | Cooler Master Hyper 212+ Push/Pull| Crucial M4 128GB SSD|Western Digital 500GB x2|| ASUS M5A97 EVO|XFX HD 7870 DD 1200/1450|Corsair XMS3 16GB (4x4GB) DDR3 1600MHz|Lite-On Blu-ray 3D burner|Corsair TX850 850w
HTPC: Core 2 Duo E4500| ASUS IPIBL-LB| Samsung 2GB(512MBx4) DDR2 667MHz| Lite-On Blu-ray 3D Burner| Galaxy GT 440 2GB| Antec TruPower 480w| 2x western Digital 500GB HDD| Audigy 2 ZS w/ Live Bay (Optical)|
Last edited by Durvelle27; 01-26-2013 at 12:31 PM.
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01-28-2013, 01:34 PM
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#7
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Junior Member
Join Date: Jan 2013
Posts: 20
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fair points. perhaps a list of all the calculators, since a majority of posts here seem to be about needed wattage. 
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01-28-2013, 02:42 PM
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#8
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Diamond Member
Join Date: Dec 2010
Posts: 7,322
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None of the calculators are useful enough to be stickied. All of them estimate (or should I say overestimate) the PSU wattage, none of them calculate actual peak power consumption. Perhaps instead there should be a sticky with information about how to judge how much power your system uses, how to decide the PSU wattage needed, and whether a particular PSU is worth buying or not.
__________________
Asus P8Z77-V | i7-3770K @ 4.2GHz | Scythe Mugen 2 with Noiseblocker B12-3 @ 5V | 2x4GB Samsung 1333 | Sapphire 7950 1100/1450 | Asus Xonar DX | OCZ Vertex 2 120GB | Samsung F4EG 2TB | WD Caviar Green 1TB | Seasonic X-660 | Fractal Design Define R3 | Bitfenix Hydra Pro with Noiseblocker B12-3 fans | BenQ XL2411T | Sennheiser PC350 | Logitech G710+ | Zowie AM-GS | Zowie G-TF
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02-05-2013, 01:14 PM
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#9
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Junior Member
Join Date: Feb 2013
Posts: 6
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Some time we can't use it without electricity
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02-05-2013, 05:37 PM
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#10
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Diamond Member
Join Date: Mar 2006
Posts: 5,189
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Lol, that calculator added 200 watts for an HD7850 card, which is a 105w card.
It says I need a 550w supply for my system, which draws 200w from the wall when fully loaded.
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02-05-2013, 06:21 PM
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#11
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Golden Member
Join Date: Aug 2011
Posts: 1,609
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An i3/i5 pc with a 7850 won't take more than 200-220W peak while gaming, (more in furmark). The online calculators overestimate the power requirements alot.
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02-05-2013, 07:28 PM
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#12
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Senior Member
Join Date: Jan 2013
Posts: 460
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ASUS: 400W
Thermaltake: 356W
Actual PSU: 750W
Peak usage: about 270W (hypothetical since I actually haven't measured)
Result: power usage calculators fail, but are accurate enough in my case, re-confirmed my over-powered PSU. (cheap, matched color scheme, don't care)
Edit: MSI's calculator is pretty close (assuming "stock").
Power-On's isn't... though it doesn't have my CPU/GPU either, but it's way off.
Last edited by Vectronic; 02-05-2013 at 07:39 PM.
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