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Help on Final PSU Decision

N

nitz12

Weaksauce
Joined
Dec 4, 2007
Messages
88
I am struggling to make a final call on these Corsair PSU's - all of which more than exceed the requirements to run my system. The two non-modular units are cheaper, but the modular unit , based on many reviews, appears to be quieter and will allow for better airflow in the case.

Any suggestions, votes, would be appreciated - or alternative PSU's within this price range. Is there any negative to having too many watts?

Corsair 650TX - $87.99
Corsair 750TX - $99.99
Corsair 620HX - $114.99
 
Definitely the 750TX. More power at a cheaper cost? Hell yeah! Though if you really want modular cabling, go for the 620HX. In fact, this is all up to you to decide now.

No major negatives to having to many watts.
 
nitz12 said:
I am struggling to make a final call on these Corsair PSU's - all of which more than exceed the requirements to run my system. The two non-modular units are cheaper, but the modular unit , based on many reviews, appears to be quieter and will allow for better airflow in the case.

Any suggestions, votes, would be appreciated - or alternative PSU's within this price range. Is there any negative to having too many watts?

Corsair 650TX - $87.99
Corsair 750TX - $99.99
Corsair 620HX - $114.99
Click to expand...

I used Antec newpower 480, 550vx, 650 tx. 480 is the quietest, i like it. 550VX is too loud for me. 650TX is in the middle.
 
Well, the modular cabling is obviously neater and less intrusive, but are the gains in airflow that significant to outweigh the added wattage at $15 less? Are there other considerations, pro and con, to a modular PSU?
 
nitz12 said:
Well, the modular cabling is obviously neater and less intrusive, but are the gains in airflow that significant to outweigh the added wattage at $15 less? Are there other considerations, pro and con, to a modular PSU?
Click to expand...

The airflow difference is not significant at all. In any decent case, you should have room to stuff a bundle of unused cables in a place that does not affect airflow. I just use a modular for the neat and tidy factor. Also it was only $78 shipped so I could not pass it up :D

If you want to save some money, a Corsair 450 would be plenty for your system as well.
 
I guess my main concern with going to a lower wattage, and perhaps this is false thinking, is that the PSU Noise increases in proportion to the Power Output. For instance, you might see a jump in PSU Noise at 300W for a 450W psu whereas you might not see that jump until 400W in a psu at 600W+. Theoretically, you might not see that jump until later with the TX750. You can see an example of something like this in the table here:

http://www.silentpcreview.com/article813-page5.html

Though I think the TX750 was built with CWT parts and the TX650 with Seasonic parts, which might impact the PSU noise differently altogether.
 
nitz12 said:
I guess my main concern with going to a lower wattage, and perhaps this is false thinking, is that the PSU Noise increases in proportion to the Power Output. For instance, you might see a jump in PSU Noise at 300W for a 450W psu whereas you might not see that jump until 400W in a psu at 600W+. Theoretically, you might not see that jump until later with the TX750. You can see an example of something like this in the table here:

http://www.silentpcreview.com/article813-page5.html

Though I think the TX750 was built with CWT parts and the TX650 with Seasonic parts, which might impact the PSU noise differently altogether.
Click to expand...


Well going by that, the 450 and 650 jump from almost nothing to >30db somewhere between 300 and 400w. With your configuration, you are using well under 300w of output from the power supply. The 450w is a Seasonic build and almost identical to the Antec Earthwatts 500 (the Corsair uses higher temp rated caps).
 
ocellaris said:
Well going by that, the 450 and 650 jump from almost nothing to >30db somewhere between 300 and 400w. With your configuration, you are using well under 300w of output from the power supply. The 450w is a Seasonic build and almost identical to the Antec Earthwatts 500 (the Corsair uses higher temp rated caps).
Click to expand...

Well, it is under 300W currently, but may not be in the near future. As far as Antec goes, I had to RMA three SmartPower's a couple years back, so one will never again enter this home. Don't know if they were Seasonic or not, hope not. If so, that would make my choice easy, the TX750.
 
nitz12 said:
Well, it is under 300W currently, but may not be in the near future. As far as Antec goes, I had to RMA three SmartPower's a couple years back, so one will never again enter this home. Don't know if they were Seasonic or not, hope not. If so, that would make my choice easy, the TX750.
Click to expand...

With Antec it just depends on who makes the internals, so its kind of a crapshoot between the product lines. I do not believe Seasonic made the Smartpowers.

Anyway just get the 650 or 750.
 
ocellaris said:
With Antec it just depends on who makes the internals, so its kind of a crapshoot between the product lines. I do not believe Seasonic made the Smartpowers.
Click to expand...

CWT made the Smartpower. But it was Antec who specified what parts and what quality the PSU was/is.
 
If you are running CF/SLI gpu's now or plan in the future, make sure your new PS has enough pci-e power connectors be it 6pin or 8pin.

Any of them corsairs will be fine but myself, prefer modular so hx620.
 
The TX750 is a bit louder than the other ones on your list, but has the most power output.
The HX620 is a good choice as well, a bit less power but adds modular cables.
 
From Hardware secrets:
...So you will be basically paying for a 620 W product and bringing home a 740 W power supply.
Click to expand...

This is why I vote for the HX over the TX if you got a bit of extra cash and like it being quiet and modular.

Losing 10Watts isn't really losing anything and other sites HAVE pushed this PSU to 750Watts at 50C load and seen over 80% efficiency...I myself pushed it to 700Watts while still Getting over 80% efficiency.
 
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