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PostPosted: Sat Dec 08, 2007 3:13 pm 
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If you want quiet look at the better quality Seasonic or Corsair units.

If you want cheap quiet look at Antec Earthwatts 500W, but I don't recommend it or the the regular S12-II models anymore. The Corsair VX and HX models have stolen the spotlight.

Code:
Model       Output (W)  150     200     250     300     400     500
        Efficiency
Corsair VX450W          82.6%   84.8%   83.3%   83.0%   81.8%
Corsair HX520W          81.0%   84.5%   85.2%   85.1%   83.7%   81.3%
     S12-550E+          81.9%   84.8%   84.3%   84.1%   82.9%   81.2%


         Temp Rise (°C)
VX450W                   4       7       9      11      16
HX520W                   7       9      12      13      12      11
S12-550E+                5       8      12      10      12      13

         Noise (dBA@1m)
VX450W                  21      21      22      26      35
HX520W                  22      22      22      22      29      43
S12-550E+               20      20      21      25      38      40


Corsair VX450W $75
HX520W $100
S12E+550W $120

VX450
Pros:
Best efficiency of the three when under 200W
Lowest Price of the three
roughly tied for 2nd flattest fan curve (only the HX520 has a flatter curve)

Cons:
lowest output in watts of the three (pretty minor con)


HX520
Pros:
Modular
Flattest fan curve
2nd lowest price of the three
Highest efficiency above 250W and highest of the three PSUs at any of the measured points (85.2%)

Cons:
Efficiency is low under 150W (this can be significant when you buy this PSU for a system that can't get above 150W.)


S12-550 E+
Pros:
Lowest idle noise
roughly tied for 2nd flattest fan curve (only the HX520 has a significantly flatter curve)

Cons:
Expensive compared to the VX450 and HX520

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PostPosted: Thu Dec 13, 2007 10:27 pm 
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Corsair Hx750


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PostPosted: Fri Dec 14, 2007 6:43 am 
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Huh?

afunguy26 wrote:
Corsair Hx750


This is about 2.5X more power than the OP needs... :roll:

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PostPosted: Sat Dec 15, 2007 1:45 pm 
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afunguy26 wrote:
Corsair Hx750


First off there is no such thing as a HX750. The corsair 750 watt PSU is a TX model. I'm not sure why you want to recommend the TX750.

I still think paying the extra for the HX620 is a waste of money for the average system but I wouldn't have complained if you suggested he go for it over the HX520. Going up one grade for the color preference or just to future proof your investment has it's merits but don't be fooled into thinking you absolutely have to buy a 750 watt PSU just because you read some joe on a board recommending it with no data to back up his recommendation.

Code:
Model       Output (W)  150     200     250     300     400     500
        Efficiency
Corsair VX450W          82.6%   84.8%   83.3%   83.0%   81.8%
Corsair HX520W          81.0%   84.5%   85.2%   85.1%   83.7%   81.3%
Corsair HX620W          79.9%   83.6%   84.5%   84.7%   83.9%   81.9%

         Temp Rise (°C)
VX450W                   4       7       9      11      16
HX520W                   7       9      12      13      12      11
HX620W                   7       9      12      12      12      11

         Noise (dBA@1m)
VX450W                  21      21      22      26      35
HX520W                  22      22      22      22      29      43
HX620W                  22      22      22      22      29      43


Take a close look at the numbers comparing a HX520 and HX620 and tell me you see a good reason to spend the extra 40% (I see them as about $100 to about $140) for what is only an extra 20% in wattage.

Heck you can get the VX450W for under $75. At least in that comparison the HX520 gets you a flatter fan curve, modular cables, and better heat management.

For 40% higher price you ought to be pretty darn sure you need that wattage unless you have money to burn...

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PostPosted: Sat Dec 15, 2007 3:40 pm 
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Heh, Corsair has their own PSU calc now

http://www.corsair.com/psufinder/default.aspx

Core2Quad + Geforce 8 series other + 4 hard drives with no overclocking = VX450W

overclock the CPU less than 30% - no change still VX450W

overclock the CPU less than 30% and overclock the video and it still allows the VX450W.

overclock the CPU more than 30% and it still recommends the VX450W

to get it to stop recommending the VX450W I had to change it to:

Core2quad over 30% overclocked
Geforce 8800GT overclocked
and 8 or more hard drives.

Or just change it to SLI anything with even 1 hard drive. As the VX450W is never recommended for SLI even though it would work quite well in a midrange SLI setup.

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PostPosted: Sat Jul 12, 2008 9:02 am 
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Location: Sweden
I have actually had both the Corsair 750 and the corsair 650 along with bluestorm II and thermaltake 750 at home.

The blustorm 2 sounded worst of them. I didnt have time to compare the Corsair 650 with the thermaltake but the specs are the same if not better with the Corsair 750 so......

Well, the Thermaltake sounded a litter less than the corsair 750 actually. I had the same equipment connected to them and had them side by side switching on and off by jumpstart. The Corsair 750 souned as i said more overall and most important, it sounded a lot more than the Thermaltake at the back where its hard to do anything about it. :( The corsair 750 also had some strange noise from the fan rotating which the Thermaltake didnt. Ive compared them extremely carefully as i HATE noise!!!! The corsair 750 went back :) No coil whine from either of them. I use watercooling system so i dont want any extra noise from the PSU!!
I also compose music so a quiet psu is a must!

A few reviews of the Bluestorm 2 at the stores website told me that it was totally quied. Yeah, if u have a CPU fan running at 40db im sure it is ;)

Is i recall the Corsair 650 was about the same as the Corsair 750 in noise.

Have to compare yourself i guess....


/Fredrik


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