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Outervision.com psu calculator says I need 928W and 62.7A - Page 2

post #11 of 20
Never screw with capacitor aging either.

I'd prefer if they removed those three settings altogether.
post #12 of 20
Those calculators always overshoot.
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post #13 of 20
Thread Starter 
Quote:
Originally Posted by Phaedrus2129 View Post
Never screw with capacitor aging either.

I'd prefer if they removed those three settings altogether.
So I'll set that cap aging to 0. What should I set the TDP and load to for a more realistic calc.? I mean below their recommended setting?


Also, I'll be using a CM HAF 932 case and Venomous-X with two 120's.

Total fans;
3 X 230mm
1 X 140mm
2 X 120mm

for whatever difference that makes.
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post #14 of 20
Fans, SSD's, HDDS, lights, DVD/Bluray Drives, fans, etc don't really consume that much power so they can usually be left completely out of the equation. And before someone tries to chime in and negate this I'm referring to your typical system.
Edited by Lampen - 2/25/11 at 12:57pm
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post #15 of 20
Set TDP and load to 90%, that's the default. That won't put you too far off.
post #16 of 20
Quote:
Originally Posted by obsidian86 View Post
62 amps =/= 928 watts
928 watts = 77 amps
62 amps = 744 watts
You have to account for the difference in efficiency. PSU's are typically rated by how much power they draw from the wall, not by how much power they can actually provide to the components. 62/77 = 80%, which is a typical number to use when calculating PSU efficiency.
post #17 of 20
Quote:
Originally Posted by SgtSpike View Post
You have to account for the difference in efficiency. PSU's are typically rated by how much power they draw from the wall, not by how much power they can actually provide to the components. 62/77 = 80%, which is a typical number to use when calculating PSU efficiency.
incorrect,psu's are rated by the amount they can deliver the efficiency numbers account for the amount of power lost during ac/dc conversion

for an 80% efficient psu to provide 100% of its rated wattage it draws 120% of its rated wattage to compensate for the loss due to heat and other factors

same for a psu rated 90% efficiency to provide 100% its labeled wattage it will draw 110% from the wall
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post #18 of 20
Quote:
Originally Posted by SgtSpike View Post
You have to account for the difference in efficiency. PSU's are typically rated by how much power they draw from the wall, not by how much power they can actually provide to the components. 62/77 = 80%, which is a typical number to use when calculating PSU efficiency.
It's the other way around, PSUs are rated for what they can deliver to the components, i.e. a 750W unit can deliver 750W of power, but in so doing will be drawing 937.5W from the wall assuming it's 80% efficient.
post #19 of 20
My bad, I always thought it was the other way around.
post #20 of 20
Thread Starter 
Quote:
Originally Posted by Phaedrus2129 View Post
Set TDP and load to 90%, that's the default. That won't put you too far off.
Much better. That puts it at 653W/3.3v=6.7A/5V=11.8A/12V=47.7A

Add in a sound card and fan controller, and it goes to;
670W/3.3V=6.7/5V=14.2/12V=48.1

Based on this I would opt for the AX750. However, I see on Newegg that because of different rebates, the AX750 and the AX850 are both going for $169.99. Price being equal, is there any reason not to buy the AX850? Reading the tests at JG, it looks like this unit has pretty high efficiency even at lower wattage needs. Or am I reading that wrong?
Maybe the SeaSonic X-750?
Edited by Rellen13 - 2/25/11 at 4:24pm
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