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Two different? same? PSUs from Corsair?

Gamer Guy
By Gamer Guy
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32 minutes ago, Gamer Guy said:

75$ for newer CX650M (amazon link). 80$ for the older one.

DAMN!  What?

 

That's weird.

 

Well.. I would normally say get the old one to help clean up old inventory.  But if it's $5 more than the new one, get the new one.  LOL!

 

Posted

I wonder what is the difference between the black label + white font CX550M vs this Gray label + Black font CX550M units, apart from the label and fan grill?
Is there any revision on the new units (Black label+white font)? If so, where can I see/read what are the improvements/revision? The Black label+white font unit is not available to order here.

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9 hours ago, Gamer Guy said:

I wonder what is the difference between the black label + white font CX550M vs this Gray label + Black font CX550M units, apart from the label and fan grill?
Is there any revision on the new units (Black label+white font)? If so, where can I see/read what are the improvements/revision? The Black label+white font unit is not available to order here.

black label, with wqhite text is never model

I Use my knowledge as business owner and self taught technician aswell as an AI to help people. AI might be controversial but it actually works pretty well 90% of the time.

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11 hours ago, Gamer Guy said:

I wonder what is the difference between the black label + white font CX550M vs this Gray label + Black font CX550M units, apart from the label and fan grill?
Is there any revision on the new units (Black label+white font)? If so, where can I see/read what are the improvements/revision? The Black label+white font unit is not available to order here.

I understand the confusion.

 

Amazon is showing a picture of the old CX-550M.  But the part number for the new one.  

 

CP-9020220 is the newer CX-M.

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20 minutes ago, jonnyGURU said:

I understand the confusion.

 

Amazon is showing a picture of the old CX-550M.  But the part number for the new one.  

 

CP-9020220 is the newer CX-M.

Are the only differences the label and housing?

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25 minutes ago, jonnyGURU said:

CP-9020220 is the newer CX-M.

Amazon India is showing CP-9020221 instead of 220. Amazon is wrong again?

1 minute ago, jonnyGURU said:

The new one got a lot of engineering improvements.

Can you share what are all the improvements in short?

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3 minutes ago, Gamer Guy said:

Amazon India is showing CP-9020221 instead of 220. Amazon is wrong again?

‎CP-9020221 is the 650W.  CP-9020220 is the 550W.

 

3 minutes ago, Gamer Guy said:

Can you share what are all the improvements in short?

Maybe later.  For now, you can look at the Cybenetics reports for each.

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16 minutes ago, Gamer Guy said:

Thanks! I will wait. In the mean time, I will check cybentics report.

Looks like no Cybenetics report either.  Only on the "private server".  I just pinged Aris telling him to make it live on the public site.

 

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21 minutes ago, Gamer Guy said:

Great, I will keep checking Cybenetics occasionally but if you come to know its public, kindly post a reply here.

Will do.  

 

Also need to get the "before/after" spreadsheet from work.  But it's Sunday, soo....  😉

 

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12 hours ago, jonnyGURU said:

I just pinged Aris telling him to make it live on the public site.

The review at Cybenetics is live now.

 

Links:

2017 Gray label 650W unit - https://www.cybenetics.com/d/cybenetics_Vn3.pdf

2021 Black label 650W unit - https://www.cybenetics.com/d/cybenetics_TsU.pdf

 

These are what I cane see is new in CX-M (2021) 650W unit:

 

Fan bearing type changed from sleeve to rifle

Max. Amps on the 3.3V and 5.5V rails are reduced by 5A and from 0.8A to 0.3A on the -12V rail

24-pin ATX cable and 4+4 pin EPS cable gauges changed from 16-22 AWG to 18-22 AWG

Seems like a lot changed in Primary and Secondary side electrical components (which I don't know anything in detail)

Increased Avg. Noise output (by 4dB)

Stand-by power consumption is increased a bit

Ripples are lower in 12V rail but more in 5V rail

Holdup time reduced from 12.67ms to 9.7ms

AC Loss to PWR_OK Hold Up Time reduced from 9.54ms to 8.9ms

PWR_OK Inactive to DC Loss Delay reduced from 3.02ms to 0.8ms

 

Things I noticed in gray label review data:

1) The "Fan model" row in secondary side in pdf shows Hydro dynamic bearing in the pdf but it is sleeve bearing. (DUT specifications table in pdf shows sleeve bearing)

2) The efficiency rating inside PDF is Gold but the table data in website shows Silver.

3) 10-110% load test, 20W-80W load tests and ripple measurement test doesn't show input voltage, I guess it's 115V.

 

Coming to comparison, it looks FOR ME like the 2021 units are not improved over the 2017 ones or am I wrong?

Edited by Gamer Guy
Edited to add PDF links
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5 minutes ago, Gamer Guy said:

This is 2021 black label unit. Those 3 points I listed were for 2017 gray label units, mentioning them here just as an information.

 

I imagine you have downloaded the 115V document. You may notice that once you open the area for each brand in the database, you can select between 115V and 230V data. It was useful in the early days of the database, when Cybenetics Labs produced two different documents for each input voltage.

 

Cybenetics_Evaluation_Report_Corsair_CX650M-7.thumb.png.fcca01a7e579cca014ada471ef3dd9fc.png Cybenetics_Evaluation_Report_Corsair_CX650M-8.thumb.png.f278d975fb6fedc37c8bf7db9fc117a8.png

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1 hour ago, Phynsx said:

I imagine you have downloaded the 115V document.

No, I went to the "ETA & Lambda 230V", used Ctrl+F to highlight both CX650Ms and compared the PDFs.

 

Now I checked the PDF in "ETA & Lambda 115V" too, the PDF's are same and the three points I said still applies. I don't know what ETA (Redundant) 230V is for.

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Haha.. I guess on a high level it doesn't look better.  I just know off top of my head that we beefed up the primary side to make it bullet proof.  😄  We moved the OTP from the secondary to the primary and beefed up the bridge diode.

 

I forgot about putting the smaller bulk cap in there, though.  Can't believe it's been a year now.  😮

 

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7 hours ago, jonnyGURU said:

Haha.. I guess on a high level it doesn't look better.  I just know off top of my head that we beefed up the primary side to make it bullet proof.  😄  We moved the OTP from the secondary to the primary and beefed up the bridge diode.

 

I forgot about putting the smaller bulk cap in there, though.  Can't believe it's been a year now.  😮

 

 

That capacitor was the cherry on top of the cake... or the pineapple on top of the pizza. Wouldn't a larger, non-Japanese capacitor fit better?

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15 minutes ago, Phynsx said:

 

That capacitor was the cherry on top of the cake... or the pineapple on top of the pizza. Wouldn't a larger, non-Japanese capacitor fit better?

Yeah... 

 

Problem is, if you've used Japanese in the past, customer expect Japanese in the future because of the perception that they're better.  But money had to be saved to make up for the cost difference of the thermistor and BD, so we ended up with what we got.

 

That said, I would love to look into the cost  adder (if any) for a "Chinese/Taiwanese" brand cap that was 470uF instead of a Japanese 330uF cap.  Bet it's a wash and I can do a rolling change (except you have to redo safeties when you change the primary side).  Tell everyone, "F you it's an Elite/Teapo/Whatever.. at least you get your hold up time AND it doesn't cost more!"  LOL!

 

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8 hours ago, jonnyGURU said:

I just know off top of my head that we beefed up the primary side to make it bullet proof.  😄  We moved the OTP from the secondary to the primary and beefed up the bridge diode.

Does this mean the newer units are overall better for the end consumer?

 

8 minutes ago, jonnyGURU said:

at least you get your hold up time

Since the hold up time is lower, will my PC restart during a power cut before switching from mains to battery?

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38 minutes ago, Gamer Guy said:

Since the hold up time is lower, will my PC restart during a power cut before switching from mains to battery?

If you're using a UPS, then no.  Switch over time from mains to battery on 99% of the UPSs out there are typically less than 12ms.  And Aris did his testing at full load.  So unless you're actually using the PSU at 650W load, you won't have an issue.  At 80% load, the hold up time should be good as long as the PSU is only at 75% load when the power goes out.

 

39 minutes ago, Gamer Guy said:

Does this mean the newer units are overall better for the end consumer?

Well.. not "everyone".   If the majority of failures is for a particular reason, even if those failures account for .01% of units sold, we tend to hyper focus on those failures and figure out a reason to solve them.  Thus the changes.

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11 minutes ago, jonnyGURU said:

If you're using a UPS, then no.  Switch over time from mains to battery on 99% of the UPSs out there are typically less than 12ms.  And Aris did his testing at full load.  So unless you're actually using the PSU at 650W load, you won't have an issue.  At 80% load, the hold up time should be good as long as the PSU is only at 75% load when the power goes out.

 

Well.. not "everyone".   If the majority of failures is for a particular reason, even if those failures account for .01% of units sold, we tend to hyper focus on those failures and figure out a reason to solve them.  Thus the changes.

OK, straight question. What would you recommend? 2017 CX650M OR 2021 CX650M for an i5-11400 + RX 580 4GB system (No OC'ing)

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