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

post #1 of 20
Thread Starter 
...and that just seems too high to me, from all that I have read on these boards.

I am planning a new build, and did not expect to have this much trouble deciding on a new PSU. The build will be as follows:

ASUS Rampage III Formula
Intel i7 950 Bloomfield (will be OC'd to 4.2)
3 X 2GB Mushkin Blackline
2 X EVGA Geforce GTX 560 Ti Superclocked in SLI (will also prolly OC)
2 X C300 SSD 64GB in Raid 0
1TB 7200rpm WD HDD
Blue Ray Burner
DVD/CD combo
X-Fi sound card
Windows 7 ultimate
and will have 1 or 2 external drives hooked up occasionally.


I am planning on keeping this rig for 5 plus years (with the occasional upgrade to a part here or there, 'natch), and I did notice that the wear % made a big factor on the wattage size, but 928W?

I was thinking more along the lines of an AX850, or even the AX750. I guess EVGA's min amp suggestion for the 560 Ti (30A) are pretty high, but I am not sure what the combined draw of a pair of these in SLI would be, nor have I been able to find that info (would it really be 60A?!!).

Any help or suggestions would be great, and what do you guy's think about that calculator? It is accurate?
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Hard DriveOSMonitorKeyboard
2 X C300 64Gb/80Gb Barricuda/1Tb WD RE3 series Windows 7 Pro 64bit ASUS VE249H Microsoft 
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post #2 of 20
You'd be surprised how much power those 560's consume. It seems accurate to me.
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Lightning
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post #3 of 20
What a freaking joke. No, that won't use anywhere near 900W.
A good 650W unit will be perfectly fine. Anything beyond 750W would be silly.
post #4 of 20
Quote:
Originally Posted by GoTMaXPoWeR View Post
You'd be surprised how much power those 560's consume. It seems accurate to me.
Please understand how a product works before you respond to someone's question. 560's use VERY little power, even under full load and in SLI. They use even less than the 460's while producing about 15% more processing power.

Quote:
Originally Posted by Shub View Post
What a freaking joke. No, that won't use anywhere near 900W.
A good 650W unit will be perfectly fine. Anything beyond 750W would be silly.
This person is correct. PSU calculators are largely a joke because they constantly tell you to get a unit that produces 200-300 more watts than you need.

To the OP if you don't plan on doing anything else to the system like adding a Physx card etc you can get away with a 650w but you won't have much headroom or go with a 750w and have a decent amount of headroom(~80% capacity used when system at full load).

Someone had a similar question a few days ago and I remembered that Newegg had this up for a decent price(100 bucks after MIR):

http://www.newegg.com/Product/Produc...82E16817139006
Edited by Lampen - 2/25/11 at 9:50am
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post #5 of 20
Let me guess. You turned CPU TDP % and System Load % to 100%, right?
post #6 of 20
PSU Calculators are absolute garbage. At the most you'll need about 750W-800W.
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post #7 of 20
62 amps =/= 928 watts
928 watts = 77 amps
62 amps = 744 watts
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post #8 of 20
Thread Starter 
Quote:
Originally Posted by Phaedrus2129 View Post
Let me guess. You turned CPU TDP % and System Load % to 100%, right?
I don't think so, but I'll have to check when I get home tonight. I did have the capacitor aging set to 25%, and noticed a huge jump from that.
New Build
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CPUMotherboardGraphicsRAM
i7 2600k @ 4.7 1.34v ASUS Maximus IV Extreme 2 X ASUS GTX 560 Ti CU II SLI 2 X 4Gb G.Skill Ripjaws 1866 
Hard DriveOSMonitorKeyboard
2 X C300 64Gb/80Gb Barricuda/1Tb WD RE3 series Windows 7 Pro 64bit ASUS VE249H Microsoft 
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New Build
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 4.7 1.34v ASUS Maximus IV Extreme 2 X ASUS GTX 560 Ti CU II SLI 2 X 4Gb G.Skill Ripjaws 1866 
Hard DriveOSMonitorKeyboard
2 X C300 64Gb/80Gb Barricuda/1Tb WD RE3 series Windows 7 Pro 64bit ASUS VE249H Microsoft 
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Corsair AX850 HAF 932 Razor Death Adder 
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post #9 of 20
Thread Starter 
Quote:
Originally Posted by obsidian86 View Post
62 amps =/= 928 watts
928 watts = 77 amps
62 amps = 744 watts
You're right. I was going from memory (and she ain't what she used to be) from what I ran last night. I'll re-check the suggested amps, but I know the 928W was correct.
New Build
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 4.7 1.34v ASUS Maximus IV Extreme 2 X ASUS GTX 560 Ti CU II SLI 2 X 4Gb G.Skill Ripjaws 1866 
Hard DriveOSMonitorKeyboard
2 X C300 64Gb/80Gb Barricuda/1Tb WD RE3 series Windows 7 Pro 64bit ASUS VE249H Microsoft 
PowerCaseMouse
Corsair AX850 HAF 932 Razor Death Adder 
  hide details  
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New Build
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 4.7 1.34v ASUS Maximus IV Extreme 2 X ASUS GTX 560 Ti CU II SLI 2 X 4Gb G.Skill Ripjaws 1866 
Hard DriveOSMonitorKeyboard
2 X C300 64Gb/80Gb Barricuda/1Tb WD RE3 series Windows 7 Pro 64bit ASUS VE249H Microsoft 
PowerCaseMouse
Corsair AX850 HAF 932 Razor Death Adder 
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post #10 of 20
The CPU could draw a lot of power depending on the voltage you feed it. But near 1000W for the rig is a bit excessive, agreed.
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My System
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