Corsair Readies CX-F RGB Line of Entry-level PSUs Targeted at Gamers

[Searing]

Oh. I am VERY familiar with Noctua.

We use this machine to compare competitor's fans and found that Noctua is among the worst for static pressure:

Corsair Takes Fan Testing Seriously

Corsair spent $45,000 on a fan testing machine, takes fan testing seriously.

www.tweaktown.com

Noctua relies heavily on misleading marketing. They only show you CFM vs. RPM with dBA data and say, "look! We're quieter!", but they leave out the data for static pressure (meansured in Ps, or mmAq). A true PQ curve graph has THREE plot points. RPM, CFM and Ps. In "free air" (eg: case fan) you can use a Noctua fan at it will be adequate and quiet. But in an application that requires higher static pressure (eg PSU, radiator, etc.), the RPM of a Noctua fan needs to be cranked up so high that the "noise advantage" is completely negated.

So yeah... putting a Noctua in a PSU is putting a shitty fan in a PSU. I mean... there are worse fans used in some low end PSUs, sure. But the Noctua is NOT the best choice for a PSU.

I'll just leave it at "I disagree". Noctua fans are very quiet at low RPM especially, and I am much less likely to get a broken fan in the box. Spending my life dealing with Gigabyte PSU's with fans that are broken in the box, or MSI fans in their cases, or Bitfenix HDB fans sounding wrong out of the box... Noctua excels at avoiding weird noises at low RPMs, sound that is not picked up on a decibel metre.

Getting side tracked, this all started with me just wanting a totally silent bronze PSU (since in Canada right now the cheapest silent Gold is $150 which is a lot to spend on every computer you build. Sadly the Corsair CV and CX and Gigabyte models (all of them) have been very loud.

Also what is with PSUs coming with broken thermal regulators? I've had 3 this year that ran at max speed even on low loads. Gold PSUs. One Rosewill, one Cooler master, one Gigabyte one. That clearly isn't 20 db out of the box. I want more than 2 out of 3 PSUs I unbox to be quality... under $150...

I basically just buy the RM650/X everytime I want problem free, but that cost adds up.

 

[jonnyGURU]

I'll just leave it at "I disagree". Noctua fans are very quiet at low RPM especially

You disagree because you don't know/understand fans. Quiet at low RPM is true of most PWM fans. With DC fans, if you need higher RPM at the top end, you have to increase the number of windings in the motors. This increases the starting voltage required, which translates to higher RPM/noise. Unfortunately, a PWM controller is a 15 cent cost adder and a lot of companies aren't willing to eat that cost. Also, a decent driver IC is needed to keep the sine wave smooth, but that too is a cost adder (like 20 cents) and again, many companies don't want to eat that cost.

Spending my life dealing with Gigabyte PSU's with fans that are broken in the box, or MSI fans in their cases, or Bitfenix HDB fans sounding wrong out of the box...

You're comparing apples to oranges here. Gigabyte PSUs come with garbage DC fans with cheap IC drivers. MSI cases come with garbage fans that don't even have good bearings, never mind with a good driver IC. Not familiar with Bit Fenix.

It sounds to me you just need to stop buying garbage parts. Gigabyte PSUs? MSI cases? Really?

Noctua excels at avoiding weird noises at low RPMs, sound that is not picked up on a decibel metre.

Yeah. It's called using a decent driver IC.

Getting side tracked, this all started with me just wanting a totally silent bronze PSU (since in Canada right now the cheapest silent Gold is $150 which is a lot to spend on every computer you build. Sadly the Corsair CV and CX and Gigabyte models (all of them) have been very loud.

Because they're all cheap PSUs. So you're willing to pay a premium for super hyper-marketed fans, but can't be bothered to buy a decent PSU? Sounds like your priorities are out of whack.

Also what is with PSUs coming with broken thermal regulators? I've had 3 this year that ran at max speed even on low loads. Gold PSUs. One Rosewill, one Cooler master, one Gigabyte one. That clearly isn't 20 db out of the box. I want more than 2 out of 3 PSUs I unbox to be quality... under $150...

Again: Why are you buying garbage PSUs?

I basically just buy the RM650/X everytime I want problem free, but that cost adds up.

Well.. you get what you pay for. Right? Not willing to pay for quality, you get garbage. Somehow, you think that's only true with fans????

 

[Searing]

You disagree because you don't know/understand fans. Quiet at low RPM is true of most PWM fans. With DC fans, if you need higher RPM at the top end, you have to increase the number of windings in the motors. This increases the starting voltage required, which translates to higher RPM/noise. Unfortunately, a PWM controller is a 15 cent cost adder and a lot of companies aren't willing to eat that cost. Also, a decent driver IC is needed to keep the sine wave smooth, but that too is a cost adder (like 20 cents) and again, many companies don't want to eat that cost.



You're comparing apples to oranges here. Gigabyte PSUs come with garbage DC fans with cheap IC drivers. MSI cases come with garbage fans that don't even have good bearings, never mind with a good driver IC. Not familiar with Bit Fenix.

It sounds to me you just need to stop buying garbage parts. Gigabyte PSUs? MSI cases? Really?



Yeah. It's called using a decent driver IC.



Because they're all cheap PSUs. So you're willing to pay a premium for super hyper-marketed fans, but can't be bothered to buy a decent PSU? Sounds like your priorities are out of whack.



Again: Why are you buying garbage PSUs?



Well.. you get what you pay for. Right? Not willing to pay for quality, you get garbage. Somehow, you think that's only true with fans????

I don't care about energy efficiency. I want a PSU that I can stick in a client's computer which doesn't make any noise, and doesn't cost $150 or more. A good fan and silent operation means it is good. Welcome to Canada in September 2020. Anyways you're begin toxic, I don't hear you suggesting anything under $100 CAD... bye.

 

[jonnyGURU]

I don't care about energy efficiency. I want a PSU that I can stick in a client's computer which doesn't make any noise, and doesn't cost $150 or more. A good fan and silent operation means it is good. Welcome to Canada in September 2020. Anyways you're begin toxic, I don't hear you suggesting anything under $100 CAD... bye.

I'm not being toxic. I'm just trying to point out your own logic to you.

Lower efficiency units are cheaper to make and are made for cheaper customers, and part of saving money is using garbage fans. It's a matter of meeting a price point. Average "Bronze" PSU buyer isn't willing to pay for a better fan. Average C+P buyer isn't willing to pay for better fans. Average customer that wants a better PSU wants one with better components, like a better fan.

People want to pay hundreds of dollars on high end CPUs and high end graphics cards, then buy garbage PSUs to power them, and then complain that the PSU is not as good as they expected. To me, it lacks logic. Like I said before, you get what you pay for. An all around quality PSU (quality in all aspects, and not just efficiency as efficiency does not equate to quality) is not < $100 CAD.

 

[Searing]

I'm not being toxic. I'm just trying to point out your own logic to you.

Lower efficiency units are cheaper to make and are made for cheaper customers, and part of saving money is using garbage fans. It's a matter of meeting a price point. Average "Bronze" PSU buyer isn't willing to pay for a better fan. Average C+P buyer isn't willing to pay for better fans. Average customer that wants a better PSU wants one with better components, like a better fan.

People want to pay hundreds of dollars on high end CPUs and high end graphics cards, then buy garbage PSUs to power them, and then complain that the PSU is not as good as they expected. To me, it lacks logic. Like I said before, you get what you pay for. An all around quality PSU (quality in all aspects, and not just efficiency as efficiency does not equate to quality) is not < $100 CAD.

Well even OEM computers don't come with bad fans though. At least THEY pay some attention to the noise the PSU makes even if they aren't gold.

 

[ExcuseMeWtf]

I'll just leave it at "I disagree". Noctua fans are very quiet at low RPM especially, and I am much less likely to get a broken fan in the box. Spending my life dealing with Gigabyte PSU's with fans that are broken in the box, or MSI fans in their cases, or Bitfenix HDB fans sounding wrong out of the box... Noctua excels at avoiding weird noises at low RPMs, sound that is not picked up on a decibel metre.

This is not unique to Noctua though.

I can say the same about be-quiet! Silent Wings. Or Enermax magnetic bearing based fans like TB Silence. Or even have old Fander Selekta bought in 2008 or so, still no noticeable bearing noise at min voltage. I now wish I bought a few more of those while they were still around...

And that's just what I can back up from personal experience. Really, any company selling non ball bearing fans that does good job cherry picking samples for no bearing noise fits the bill.

I want a PSU that I can stick in a client's computer which doesn't make any noise, and doesn't cost $150 or more.

If be-quiet! is available where you live, go Pure Power or above. They are virtually silent.

 

[Searing]

This is not unique to Noctua though.

I can say the same about be-quiet! Silent Wings. Or Enermax magnetic bearing based fans like TB Silence. Or even have old Fander Selekta bought in 2008 or so, still no noticeable bearing noise at min voltage. I now wish I bought a few more of those while they were still around...

And that's just what I can back up from personal experience. Really, any company selling non ball bearing fans that does good job cherry picking samples for no bearing noise fits the bill.



If be-quiet! is available where you live, go Pure Power or above. They are virtually silent.

There are only two retail locations that I know of in Canada for Be Quiet!. $100+ and waiting 2-3 weeks for Amazon.ca, or Canada Computers has one for $100 also (only 500W though and plus shipping). Anyways it is like real estate, there are no quality supplies under $100 CAD anymore.

 

[londiste]

Noctua relies heavily on misleading marketing. They only show you CFM vs. RPM with dBA data and say, "look! We're quieter!", but they leave out the data for static pressure (meansured in Ps, or mmAq). A true PQ curve graph has THREE plot points. RPM, CFM and Ps.

True, but... even their fans page has all three nicely listed:

Noctua

Noctua's premium fans are internationally renowned for their superb quietness, exceptional performance and thoroughgoing quality.

noctua.at

Something like NF-F12 is usually considered a pretty good quiet radiator fan.

 

[kiriakost]

I would love to see pictures of CX750F internals, so to make my mind of how it compares with specific good revision of CX750 which I did repair recently.
Any PSU it can become RGB due a simple addition of a DC fan with LED's.

July 2020 PSU CORSAIR CX750 Repair - CP9020015 - CWT PUQ-G - Quality Monster

July 2020 PSU CORSAIR CX750 Repair - CP9020015 - CWT PUQ-G - Quality Monster

www.ittsb.eu

Something like NF-F12 is usually considered a pretty good quiet radiator fan.

Nothing compares against to a high quality NMB-MAT DC fan 38x120 (2400 rpm) this slowed down to 1200 rpm.
Size it does matter at air dynamics.

 

[-The_Mask-]

I would love to see pictures of CX750F internals, so to make my mind of how it compares with specific good revision of CX750 which I did repair recently.

Corsair Vengeance 650M Silver - Äußeres und Technik - Seite 2 - Hardwareluxx

Test des Corsair Vengeance 650M, dem Upgrade der Vengeance Series mit 80 PLUS Silver Effizienz

www.hardwareluxx.de

It looks like this one.

 

[kiriakost]

It looks like this one.

This is a smaller 650W , for an apples to apples comparison I need to see the 750W and it DC/DC 12V rail implementation.