PSU Guide

[silkstone]

Nice, My PSU manufacturer is there with a respecatble 69 80+ certified. Everyone thinks they are crap

 

[de.das.dude]

being there does not warranty quality. only efficiency is guaranteed
corsair cx series is 80plus certified as well, but, it uses very cheap components.

 

[silkstone]

My current PSU uses Taiwanese Caps, I believe. Not as good as the Japanese ones you get in seasonic PSU's, but apparently, the build quality is pretty good.

 

[de.das.dude]

it all depends. just google for your caps name and model and you will know from some forum if its good or bad.

 

[light70]

Hi there!


I need some suggestions, I was thinking to buy a corsair CX750M but I have just discovered that it has a some problems expecially the coil whine one and it seems to afflict an high percentuality of the CX750M. So I'm actually looking for a power supply to be modular, of 750w with just one +12v line of current and to be cheap. I have found the thermaltake smart 750 which is what I'm locking for but it's a little more expensive of the corsair CxX750M, is there something else out there??

 

[TheoneandonlyMrK]

Hi there!


I need some suggestions, I was thinking to buy a corsair CX750M but I have just discovered that it has a some problems expecially the coil whine one and it seems to afflict an high percentuality of the CX750M. So I'm actually looking for a power supply to be modular, of 750w with just one +12v line of current and to be cheap. I have found the thermaltake smart 750 which is what I'm locking for but it's a little more expensive of the corsair CxX750M, is there something else out there??

I've used a 750cx and I had and my cousin now has no issues with it .
I just use corsair psu now on all builds and no issues yet.

 

[light70]

I've used a 750cx and I had and my cousin now has no issues with it .
I just use corsair psu now on all builds and no issues yet.

so I should be ignoring those:

http://forum.corsair.com/v2/showthread.php?t=115228
http://www.tomshardware.com/answers/id-1633476/cx750m-making-high-pitched-whine.html
http://forum.overclock3d.net/showthread.php?t=50863
Corsair CX750M coil whine? - YouTube
http://forum.corsair.com/v3/showthread.php?t=117907

and finally:

http://forum.corsair.com/FORUMS/showthread.php?t=116308 this is the worst case, I would like to avoid those experience. Also those are preatty much recent post so I doubt that corsair has introduced a newer revision

 

[crmaris]

Corsair sells a huge volume of PSUs and usually mostly users with bad experience post on the net about their problems. The ones that are satisfied totally forget the PSU and do not of course post around stating that it works fine unless asked.

Also from the moment they cover you with guarantee, which they actually honor, you won't have a problem. Nevertheless, if you want something more reliable go for their TX or HX series (if you can afford it).

 

[de.das.dude]

Corsair FTW, one of the handful companies who actually make quality stuff AND sincerely care for their customers as well!

depending on the use you may get a modular CX series. they work good enough.
GS series is good, but not modular.

 

[light70]

Corsair FTW, one of the handful companies who actually make quality stuff AND sincerely care for their customers as well!

depending on the use you may get a modular CX series. they work good enough.
GS series is good, but not modular.

a user report that after his fallen power supply was sent back, corsair send him back 2 replacing units that were defectves as well. I would not say that corsair this is taking care of clients!

 

[d1nky]

i was told the GS series wasnt too good! actually i was told to stay away from it.

xfx = seasonic inside....

 

[light70]

Let me understand one thing, let's say I get the corsair CX750M and it doesn't have the coil whine problem immediadly, then is possibile that the problem could appear with time? I mean in the next mounths. I would like to have something that actually works for some times!!

 

[cdawall]

a user report that after his fallen power supply was sent back, corsair send him back 2 replacing units that were defectves as well. I would not say that corsair this is taking care of clients!

Then buy something else? It's pretty simple if you are worried after reading bad reviews simply find something else. That's the benefit of having choices.

 

[light70]

Then buy something else? It's pretty simple if you are worried after reading bad reviews simply find something else. That's the benefit of having choices.

the problems is that all 750 seems to have problems, the ocz zt750 seems good but I have discovered that it soffers of hard noisy fan and need to be replaced ( also it seems that RMA send you back very often a PSU with the exact same problem ). The thermaltake smart 750 has no particolar problem but on 2 different review the articles states that their units had excedeed the 40°C degree point listed on the box under full load and arrive to 50°C which is not that great. If you know a good PSU of 750w, one line of current on the 12v, modular and of about 80 euro/100 us dollars...link at me!

 

[cdawall]

the problems is that all 750 seems to have problems, the ocz zt750 seems good but I have discovered that it soffers of hard noisy fan and need to be replaced ( also it seems that RMA send you back very often a PSU with the exact same problem ). The thermaltake smart 750 has no particolar problem but on 2 different review the articles states that their units had excedeed the 40°C degree point listed on the box under full load and arrive to 50°C which is not that great. If you know a good PSU of 750w, one line of current on the 12v, modular and of about 80 euro/100 us dollars...link at me!

No the exhaust temp of 50C has nothing to do with the box stating 40C. All that means is that the powersupply is rated to deliver a continuous 750W with intake temperatures of 40C. Exhaust temps that reach 50C is pretty standard.

 

[Frick]

@light70: Coil whine can appear over time. With any unit. People fall through the net for all companies. As crmaris said, few sad customers vs tons and tons of happy customers. If you like the Tt Smart, get that.

 

[light70]

@light70: Coil whine can appear over time. With any unit. People fall through the net for all companies. As crmaris said, few sad customers vs tons and tons of happy customers. If you like the Tt Smart, get that.

I see, it seems that the ocz zt750 has a protection for that as the 2 main bobins are fixed with somethings that seems white glues, I have red this on a review on overclocker, I have included the photo. The review states:

Notably lacking is a MOV or TVS diode for surge protection. The aPFC unit can soak up many surges that would kill older designs, but I would still prefer to see some form of surge protection.

But still a lot of people reporting loud noise from the fan...arghhhh no one is decent!!

 

[cdawall]

Then buy the thermaltake it meets all of your needs. A 50C exhaust temp is not a reason to discredit a powersupply...

 

[light70]

Then buy the thermaltake it meets all of your needs. A 50C exhaust temp is not a reason to discredit a powersupply...

techpowerup review refer to the temperature inside the box not at the outside fan.

Finally, if the manufacturer states that the maximum operating temperature of the test unit is only 40°C then we try to stay near this temperature, otherwise we crank up the heat inside the hotbox up to 45-50°C.

so not that good..

 

[cdawall]

techpowerup review refer to the temperature inside the box not at the outside fan.



so not that good..

That means that they pushed 50C air INTO the PSU. That has absolutely nothing to do with PSU quality. In fact it passed those tests with 50C intake air without an issue so what are you complaining about? Do you plan to force 50C air into your powersupply? Even in the desert I do not force 122F air into my case.

 

[light70]

That means that they pushed 50C air INTO the PSU. That has absolutely nothing to do with PSU quality. In fact it passed those tests with 50C intake air without an issue so what are you complaining about? Do you plan to force 50C air into your powersupply? Even in the desert I do not force 122F air into my case.

Well I guess you right anyway during summer it get very hot, in my room 28°C are reach in no time! Anyway I was thinking: I have seen 3 photos, one of the open CX750M, one of the thermaltake smart 750 and finally one of the TX750m. The first 2 are build from the same manufacturer ( CWT ) and both have coils inside without protection ( the reason of coil whine is that the coil is unprotected and then it vibrate generating that loud sound ) while the TX750 has a plastic protection on it to avoid the vibration. So maybe it's better to go to the TX750 because it won't vibrate with the protection, the others 2 are essentialy the same and could start makiing loud sonds with time! What do you think??


EDIT: Maybe I have found something else, the aerocool x-strike 800w, it seems good to me, it even has coil protected with gum!

 

[silkstone]

How does this look?
http://translate.google.es/translate?hl=es&sl=auto&tl=en&u=http://www.playwares.com/xe/20787215

I have the 700 W version; it should be able to power 2x 7870 Tahiti's, right?
http://www.acbel.com/eng/Product.aspx?id=60&&sd=31&&pid=256

 

[Frick]

How does this look?
http://translate.google.es/translate?hl=es&sl=auto&tl=en&u=http://www.playwares.com/xe/20787215

I have the 700 W version; it should be able to power 2x 7870 Tahiti's, right?
http://www.acbel.com/eng/Product.aspx?id=60&&sd=31&&pid=256

I have no idea, McSteel or someone should know. I did find this review of an older unit though:

http://www.hardwaresecrets.com/article/AcBel-Polytech-iPower-660-Power-Supply-Review/552/7

Which can't do anything above 40C.

But again that is an old unit, maybe things have changed now.

 

[silkstone]

I have no idea, McSteel or someone should know. I did find this review of an older unit though:

http://www.hardwaresecrets.com/article/AcBel-Polytech-iPower-660-Power-Supply-Review/552/7

Which can't do anything above 40C.

But again that is an old unit, maybe things have changed now.

Yea, that's one of the s***ty old i-power units. They were pretty bad. I had one and it lasted about 3-4 years close to 100% load and the 12v line finally failed.

 

[westom]

... ( the reason of coil whine is that the coil is unprotected and then it vibrate generating that loud sound ) ...

That 'protection' is irrelevant. We made power supplies including making those coils. The coil is wrapped. Then placed into a vacuum. Then a sealant (ie varnish) enters. Vacuum sucks varnish into all empty coil spaces. Thereby locking each wire in place.

Sometimes varnish does not get into some spaces. The wire vibrates. And makes noise. That says nothing about and does not affect power supply reliability. That noise is only an irritation.

Nothing outside a coil will avert that noise.


All computer parts must work perfectly fine and happy in any 40 degree C room. Which means internal temperatures are higher (and normal).

Heat is how to find defects. Many see a defect, then assume heat created it. Nonsense. Heat is a diagnostic tool to find a hardware defective (an intermittent) BEFORE that defect causes a hard failure after the warranty expires. If it fails in a 40 degree C room, then it was probably defective when manufactured.