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Which is the best PSU for my system?

post #1 of 25
Thread Starter 
Im building this system in a few weeks and the only thing i dont have set in stone is my power supply (pretty much).
I plan on running 2 6950's in xfire in the near future, possibly throw in an ssd, maybe a second HDD for raid 0, my point is I need a psu with a lot of headroom for future upgrades, mainly my second 6950.

So far im stuck between these 2:
Corsair HX850 @200
http://www.newegg.ca/Product/Product...82E16817139011
Cooler master Silent 1000W PSU @ $166
http://www.ncix.com/products/index.php?sku=45896
both psu's are modular, both have 80plus certification w/ the corsair at silver


Now i heard that 1000W was overkill even for my setup so i decided to look for 850W PSU's and came across this corsair one. So even though the corsair psu has a more appropriate wattage, coolermaster offers more for less money

But I'm sure theres more to power supplies than just wattage and pricing so im counting on you guys to give me a good recommendation. Feel free to give suggestions!

EDIT: just one quick thing i want to add, im only asking about my psu, not my gpu and not my cpu so please no nvidia>amd quips or sandybridge will blow up statements, i know all about it

EDIT: I've decided to drop the coolermaster psu after further research, however i do have new psu's to consider:

Seasonic x750 for $180
Corsair ax850 for $150
From what I read, SeaSonic x series == corsair ax series
Which one would you recommend?
Edited by Xalexon - 2/10/11 at 6:35am
March 2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asus P67 Sabertooth AMD XFX Radeon 6950 Corsair Vengeance 8GB (2x4GB) 1600mhz 
Hard DriveOptical DriveOSMonitor
2x1TB Western Digital Asus 24X DVD Burner Windows 7 Home Premium Asus ML248H 
KeyboardPowerCase
Microsoft Comfort Curve 2000 Corsair AX850 Cooler Master HAF X 
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March 2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asus P67 Sabertooth AMD XFX Radeon 6950 Corsair Vengeance 8GB (2x4GB) 1600mhz 
Hard DriveOptical DriveOSMonitor
2x1TB Western Digital Asus 24X DVD Burner Windows 7 Home Premium Asus ML248H 
KeyboardPowerCase
Microsoft Comfort Curve 2000 Corsair AX850 Cooler Master HAF X 
  hide details  
Reply
post #2 of 25
A good 550w could run your system. I would look at this unit for some headroom. http://www.newegg.com/Product/Produc...easonic%20750w
post #3 of 25
Your Rig doesn't need 850w, you'll get by with a 650w just fine.

I'd recommend this one:

http://www.newegg.ca/Product/Product...82E16817151088

Or for $10 more, I'd get the X750 version.
    
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post #4 of 25
If you want to add in a second 6950 in the future, go for the HX850. It is really a 1,000 watter according to johnnyguru
Kill Bill
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Kill Bill
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post #5 of 25
Quote:
Originally Posted by jamborhgini313 View Post
If you want to add in a second 6950 in the future, go for the HX850. It is really a 1,000 watter according to johnnyguru
You could run two 6950s on the 750w I linked no problem.
post #6 of 25
Thread Starter 
right, but considering ive got a 1000W psu for ~160, shouldnt i go for that? Price is a big consideration since i want to spend less than 200 on my psu, around 160 if possible. Correct me if im wrong but isnt 1000W an amazing deal for that price? ic what you guys are saying with a 750W running my system just as well, but i feel as if im losing potential by going to a lower wattage. thoughts?
March 2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asus P67 Sabertooth AMD XFX Radeon 6950 Corsair Vengeance 8GB (2x4GB) 1600mhz 
Hard DriveOptical DriveOSMonitor
2x1TB Western Digital Asus 24X DVD Burner Windows 7 Home Premium Asus ML248H 
KeyboardPowerCase
Microsoft Comfort Curve 2000 Corsair AX850 Cooler Master HAF X 
  hide details  
Reply
March 2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asus P67 Sabertooth AMD XFX Radeon 6950 Corsair Vengeance 8GB (2x4GB) 1600mhz 
Hard DriveOptical DriveOSMonitor
2x1TB Western Digital Asus 24X DVD Burner Windows 7 Home Premium Asus ML248H 
KeyboardPowerCase
Microsoft Comfort Curve 2000 Corsair AX850 Cooler Master HAF X 
  hide details  
Reply
post #7 of 25
You can find a 1000w PSU at 70 bucks. The cooler master is OK that seasonic I linked is quality. Depends if you want more watts with a bigger ripple or a more reliable unit that will be able to handle everything you want.

Wattage is only a part of it. Just get the 750w seasonic I linked.

A good PSU is a happy system, a happy system is a happy you.

Or this unit right here. Again QUALITY.
http://www.newegg.com/Product/Produc...-102-_-Product
Edited by Live_free - 2/7/11 at 11:02pm
post #8 of 25
Don't buy watts you'll never use. Even a dual GTX480 system with an extremely overclocked i7 won't require a 1000W power supply.

Your system as specced would run on a quality 500W, and will be more efficient than running on a similar efficiency 1000W. If you plan on doing CrossFire then look at a quality 650W.

If you want the most bang for your buck, the Antec NeoECO 520C is very affordable. If you want the best available, the SeaSonic X560 and X650 / X660 are the best in their respective wattage ranges.
post #9 of 25
Thread Starter 
i see your point, both systems have enough wattage to support my system and future upgrades (second 6950, more HDD's etc.) but the seasonic can do it better because of the higher quality? Thanks i think ill go with the seasonic
March 2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asus P67 Sabertooth AMD XFX Radeon 6950 Corsair Vengeance 8GB (2x4GB) 1600mhz 
Hard DriveOptical DriveOSMonitor
2x1TB Western Digital Asus 24X DVD Burner Windows 7 Home Premium Asus ML248H 
KeyboardPowerCase
Microsoft Comfort Curve 2000 Corsair AX850 Cooler Master HAF X 
  hide details  
Reply
March 2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asus P67 Sabertooth AMD XFX Radeon 6950 Corsair Vengeance 8GB (2x4GB) 1600mhz 
Hard DriveOptical DriveOSMonitor
2x1TB Western Digital Asus 24X DVD Burner Windows 7 Home Premium Asus ML248H 
KeyboardPowerCase
Microsoft Comfort Curve 2000 Corsair AX850 Cooler Master HAF X 
  hide details  
Reply
post #10 of 25
Thread Starter 
maybe i dhould mention i plan on OCin my cpu and gpu's?
i just find it hard to believe that a 750W psu can run OC'd xfire...
not that i doubt you guys of course, this is my first build and I wouldnt be anywhere without you guys but I always had it in my head that you needed at least 1000W to use 2 gpus

thanks for all the help guys
March 2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asus P67 Sabertooth AMD XFX Radeon 6950 Corsair Vengeance 8GB (2x4GB) 1600mhz 
Hard DriveOptical DriveOSMonitor
2x1TB Western Digital Asus 24X DVD Burner Windows 7 Home Premium Asus ML248H 
KeyboardPowerCase
Microsoft Comfort Curve 2000 Corsair AX850 Cooler Master HAF X 
  hide details  
Reply
March 2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asus P67 Sabertooth AMD XFX Radeon 6950 Corsair Vengeance 8GB (2x4GB) 1600mhz 
Hard DriveOptical DriveOSMonitor
2x1TB Western Digital Asus 24X DVD Burner Windows 7 Home Premium Asus ML248H 
KeyboardPowerCase
Microsoft Comfort Curve 2000 Corsair AX850 Cooler Master HAF X 
  hide details  
Reply
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