Recommendations for a "silent" PSU

OCrhino

OCrhino

OCrhino

Associate
Joined
19 Mar 2008
Posts
29
Hi All,

I want a quiet PSU!!!. I currently have a corsair hx 650 and I think is noisy. In a quiet home office and the standalone PSU "jumped" to give power - I can the transformers humming (no jokes please). I have a thermaltak 750 tru-power which is even worse. In my other box I have a Nexus realsilent 400w psu - which on the table jump I cant hear it.

I need a 700-800w PSU that is dead silent. Using the http://www.extreme.outervision.com/psucalculatorlite.jsp I calculate I will need about 360w idle and between 600-660w at 95% load depending on graphics card.

Comments on using hiper 750w or the be Quiet 700ish or any other recommendations.

Thanks

Mike
 
The Zalman heatpipe psu's are excellent. I have the 750w version and it is totally silent. Due to the heatpipe the fan spins very slowly. It is by far the best psu i have ever owned. For god's sake don't get a Hiper.

What on earth will it be powering to require a draw that high? According to that calculator my rig draws 316w yet at the wall it only draws 242w when gaming and that includes the monitor, speakers and watercooling as well.
 
Last edited:
Tried different power cord / plug ? You either have a really bad luck and got faulty psus or something is wrong. And if you hear humming from PSU, rma it, its faulty.
 
My rig:

Q6600 overclocked to 3.8, 1.6v
8gb 6400 RAM
1 x 500gb Sata-II
4 x750Gb Sata-II
1 x switech mcp655 (??) water pump
1 x big side door fan (Thermaltak Armour)
3 x 120mm fans on Pa120.3 rad
1 x 120mm fax across disks
1 x 120mm extracting
1 x sound card (creative labs)
1 x TV card

Current video card 6600gt

According to the psu calculator I would user 356w @ 60% and 534w @ 95%

aiming for either gtx260/280 or similar i would expect to draw about between 572-664w @ 95%. Therefore assuming that most power supplies are 80% efficient a 750w unit would be OK.

As for the corsair - this is my second RMA, the first ticked. I now just want another brand.
I will look at the Zalman.
 
What on earth will it be powering to require a draw that high? According to that calculator my rig draws 316w yet at the wall it only draws 242w when gaming and that includes the monitor, speakers and watercooling as well.[/QUOTE]

How did you measure at the plug?
 
OCrhino said:
In a quiet home office and the standalone PSU "jumped" to give power - I can the transformers humming
Click to expand...
Let me guess, it's without any load?
Try adding for example fans so that 12V load rises above 1A and come back then.


And that Extreme BullS**t calculator is like dumb free fall iron bomb, most of the time can't hit anything smaller than earth and using its fuzzy logic 100W lightbulb draws 150W at minimum!
Already type of ads should there's plenty of conflicts of interests going on in that site.

This is only calculator I know which gives consistently realistic values:
http://web.aanet.com.au/SnooP/psucalc.php
 
According to the calculator in the OPs post, my system needs 297watts to operate. The PSU calculator as posted by EsaT gives a far more realistic rating of 167watts. As my PSU is a 300watt fanless, there's no way in heck it's going anywhere near 297watts at any point.
 
EsaT said:
Let me guess, it's without any load?
Try adding for example fans so that 12V load rises above 1A and come back then.

Hi, I had also performed this when leak testing - so it had 3 120mm fan and a pump - and still noisy.

The nexus in a similar environment with a smaller pump and 3 x 120mm fan was still silent.


And that Extreme BullS**t calculator is like dumb free fall iron bomb, most of the time can't hit anything smaller than earth and using its fuzzy logic 100W lightbulb draws 150W at minimum!
Already type of ads should there's plenty of conflicts of interests going on in that site.
This is only calculator I know which gives consistently realistic values:
http://web.aanet.com.au/SnooP/psucalc.php
Click to expand...


interesting, checking this site the recommended PSU should be 501w and 600w

Based on this do I need a 750w?
 
80% efficient doesnt mean it will only give 80% of its rated output. It means that 80% of the energy that goes into it, comes out as wattage into the PC, and the other 20% is lost as heat and other things.
 
UPDATE:

Thanks to all who posted. I have since purchased a plug power monitor. The results are amazing. I now agree with those who posted saying the calculators are a bit extreme!!!.

My results: peak on boot 301w, idle 195w, running vmware with 4 windows 2003 servers all active 250w, prime95 - 318w

so, I guess I will be looking for a smaller PSU now ;-)
 
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