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Power supply upgrade...

post #1 of 36
Thread Starter 
Just a year and a half ago I bought a 1000w PSU for about $100 and so far it's run really good, but I'm seeing a lot of movement in the CPU voltage, at first I was wondering why the hell it was going from 1.5 to 1.1 and then figured out that Cool 'n' Quiet was enabled, after that I did feel a little bit more comfortable.

But now here are my main questions:

Do I really need a 1kw PSU? Here's what I plan on running:

Top of the line Bulldozer CPU whenever it comes out, but for now it's a overclocked Athlon x4 @ 3.63ghz

2 AMD Radeon HD 6970s at about 950mhz and 1.175v

5 Hard drives. 2 CD Drives 4 120mm fans, 1 140mm fan and 2 80mm fans.

If I don't need a 1kw PSU, where am I going to get the best for stability that isn't going to fail on me.

Or is my current PSU really good enough? It's a 1kw Xion, and in the event that I do need a new PSU, I want something with longer cables, as they just don't always reach in my NZXT Whisper Case.

Another note, after disabling Cool 'n quiet, I don't see any more than .04v movement in the CPU.
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post #2 of 36
Even a quality 650-750W power supply would have quite enough power to handle your system (that is, with two 6970s in it) and still be able to deliver very clean and stable power - even when overclocking everything.

May I recommend a few from Newegg?


Edit: AMD recommends using a 550W power supply to power a system with one 6970 in it, so they would be recommending a 650-700W power supply for Crossfire. However, they're referring to peak-rated units while I would be recommending continuous-rated units which is why I could recommend a high quality 650W power supply.
Edited by TwoCables - 5/7/11 at 9:05pm
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post #3 of 36
You can get by with a quality 750w like the Corsair AX750 or an Antec HCP-750.

I'd opt for a 850w though for a few bucks more for future upgrades.
    
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post #4 of 36
Yes cool n quiet lowers the vcore so the cpu can run cooler! Disabling that will flow a constant stream of voltage to the cpu...and with the parts that you listed above you may need a 1k powersupply 1x 6970 at peak wattage is 250w so two is 500w and thats with them not overclocked. Also with a BD chip overclocked im sure it will pull around 130-150w not sure since there not out! So i would say a 1k psu wouldnt be a bad idea. But i dont think xion is a really trusted brand You may want to get a corsair, seasonic, Antec PSU but i would ask one of the PSU GURU guys on here they know everything about PSU's
post #5 of 36
Thread Starter 
Wow, I was thinking at least a 850w PSU would be the minimum, in the case that it's only 750w then It's going to cost a whole lot less than I thought it would.

As for recommending something from Newegg, go for it, It's always good to hear what different people like / would recommend.

EDIT:

Wow fast responses, it's good to know that I don't need anything too crazy, I think I'll just look for a good 850 PSU with 80+ Gold
Edited by Dr.Pepper - 5/7/11 at 9:10pm
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post #6 of 36
750w would do just fine, look at Antec, Corsair, XFX or Seasonic. Pick and choose with the features you want (modular cables, longer warranty, cheaper price).

EDIT: Make sure to post the PSU you find just to make sure
Edited by jellis142 - 5/7/11 at 9:11pm
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post #7 of 36
Quote:
Originally Posted by Dr.Pepper View Post
Wow, I was thinking at least a 850w PSU would be the minimum, in the case that it's only 750w then It's going to cost a whole lot less than I thought it would.

As for recommending something from Newegg, go for it, It's always good to hear what different people like / would recommend.
Even a quality 650W would be plenty because a good 650W would have a continuous 650W rating and would therefore easily handle your system if it had two 6970s in it.

If I were to recommend some PSUs, then would I have a price limit?
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post #8 of 36
Thread Starter 
I think that I'll just opt for a 750 / 850, I don't want to go to crazy, but I don't want to run things too close where I have no room for modifications, eg liquid cooling.
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post #9 of 36
Quote:
Originally Posted by Dr.Pepper View Post
I think that I'll just opt for a 750 / 850, I don't want to go to crazy, but I don't want to run things too close where I have no room for modifications, eg liquid cooling.
Even if you added a complete liquid cooling system, a high quality 650W would still have enough because you'd only be drawing maybe 20-50 more watts.
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Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #10 of 36
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
Even if you added a complete liquid cooling system, a high quality 650W would still have enough because you'd only be drawing maybe 20-50 more watts.
You're more than likely right, I just wouldn't feel right doing that, especially since this PSU is priced just right:

http://www.newegg.com/Product/Produc...82E16817371026
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