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post #21 of 96
7/17/12 at 12:09pm
Quote:
Originally Posted by DeXel View Post

I may end up doing that because I won't risk using that PSU on any system.
I have had many RMAs (Corsair, Logiech, EVGA, and few more), and they all either send the same product back, or better (G9 to G9x).
GX series is a proper replacement for eXtreme Power series not for Real Power Pro units which were on recommended psu list on OCN (although marked as overpriced).
From their business viewpoint, yes GX series is the closest as far as connections and fact that they are non-modular, but the quality of GX series is just terrible.

Extreme Power carry a 2 year warranty. GX carry a 5 year warranty.

How is the quality terrible? Can you please elaborate? We wish to know so we can make the adjustments accordingly. Have you used one yourself? If so, what sort of trouble did you have?
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post #22 of 96
7/17/12 at 12:12pm
Quote:
Originally Posted by DeXel View Post

And 2 weeks later I received what is most likely a faulty psu...
The psu won't start my system until I leave only motherboard and 2 storage devices connected. If I add one video card the system won't boot.
I am going to get new psu tomorrow to make sure that it is not the Real Power Pro 1000W.
Totally disappointed by Cooler Master quality control.
Uploading a video to YouTube atm, will add link soon.
http://www.youtube.com/watch?v=l9uUUuy9hpg

I believe one of our reps is already in contact with you on this matter. We will get this rectified.
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post #23 of 96
7/17/12 at 12:50pm
Thread Starter 
Quote:
Originally Posted by CoolerMasterUSA View Post

Extreme Power carry a 2 year warranty. GX carry a 5 year warranty.
How is the quality terrible? Can you please elaborate? We wish to know so we can make the adjustments accordingly. Have you used one yourself? If so, what sort of trouble did you have?

Not everyone have the proper equipment to test the power supplies unfortunately. As many of other people I have to rely on many reviews as the ones done by JonnyGuru.

While I used GX750W it worked OK. As a user I can't really tell a difference between working great and OK though, unless in comparison with another psu something is worse (i.e. overclock, temperature of the components).

One thing I know for sure that according to the reviews GX750 is worse than Real Power Pro 750W as far as quality. Yes GX750 has same wattage and more amperage on paper, but as JonnyGuru's review shows it is incapable of running more than 600 something watts of load. Moreover, it has terrible voltage regulations.

I am also taking into account this thread created by Phaedrus2129 to make proper comparison of "good" and "bad" PSUs sold by Cooler Master.

The Gx750 that I got was older version build by Sevensteam as somebody mentioned in this thread. There are new units that are enhance build for which I can't find proper reviews, so I cannot judge them.
Quote:
Originally Posted by CoolerMasterUSA View Post

I believe one of our reps is already in contact with you on this matter. We will get this rectified.

Yes, that's true. The thing is I don't know what will happen really at this point... At this moment I am really starting to regret that I opened RMA case since RRP 750W was working fine besides the noise.

This 1000W won't turn my system on even if I add additional fan to molex peripheral plug. I am not even sure how the PSU was tested prior to sending to miss this issue.
Quote:
Originally Posted by CoolerMasterUSA View Post

Is there anything wrong with the replacement? Have you used it?
The reason why we replaced it with the GX is because the Real Power series has been discontinued for quite some time. The next model available up that matches both the wattage and warranty would be the GX 750.

GX750 at least properly worked, RPP1000W doesn't.

And I understand why it cannot be replaced to the same unit due to being discontinued, but I don't agree that GX750 is the proper replacement as well.
Edited by DeXel - 7/17/12 at 12:52pm
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post #24 of 96
7/17/12 at 1:04pm

Did you connect the 4-pin or 8-pin power connector to the motherboard? I can't tell because the Noctua is in the way.

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post #25 of 96
7/17/12 at 1:14pm
Thread Starter 
Quote:
Originally Posted by listen to remix View Post

Did you connect the 4-pin or 8-pin power connector to the motherboard? I can't tell because the Noctua is in the way.

8 pin of course.

Hm... I need to try to use 4pin and see if my GTX460 will get enough power from 6 pin connectors to boot.

UPDATE: Nope, didn't work.
Edited by DeXel - 7/17/12 at 1:44pm
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post #26 of 96
7/17/12 at 5:26pm
The GX750 is a 450W power supply. Demonstrably so. Ripple on the +3.3V rail goes out of spec at 450W; the +12V rail goes out of spec at 550W. That's pathetic. The "revised" version released after the terrible JonnyGURU reviews only stayed on store shelves for a couple months before production was switched back to the higher-margin crap version.
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post #27 of 96
7/18/12 at 9:56am
Quote:
Originally Posted by DeXel View Post

Not everyone have the proper equipment to test the power supplies unfortunately. As many of other people I have to rely on many reviews as the ones done by JonnyGuru.
While I used GX750W it worked OK. As a user I can't really tell a difference between working great and OK though, unless in comparison with another psu something is worse (i.e. overclock, temperature of the components).
One thing I know for sure that according to the reviews GX750 is worse than Real Power Pro 750W as far as quality. Yes GX750 has same wattage and more amperage on paper, but as JonnyGuru's review shows it is incapable of running more than 600 something watts of load. Moreover, it has terrible voltage regulations.
I am also taking into account this thread created by Phaedrus2129 to make proper comparison of "good" and "bad" PSUs sold by Cooler Master.
The Gx750 that I got was older version build by Sevensteam as somebody mentioned in this thread. There are new units that are enhance build for which I can't find proper reviews, so I cannot judge them.
Yes, that's true. The thing is I don't know what will happen really at this point... At this moment I am really starting to regret that I opened RMA case since RRP 750W was working fine besides the noise.
This 1000W won't turn my system on even if I add additional fan to molex peripheral plug. I am not even sure how the PSU was tested prior to sending to miss this issue.
GX750 at least properly worked, RPP1000W doesn't.
And I understand why it cannot be replaced to the same unit due to being discontinued, but I don't agree that GX750 is the proper replacement as well.

I have checked Johnnyguru reviews. He tends to focus on the 12V and 12V only. Total wattage is not only determined from the 12V rail but from all the rails including 5V, 3.3V etc. which add up to equal the total wattage of the power supply. If you check his results and compare them to what is listed on the power supply itself (the table showing Amperage for each rail) you will see he neglects the other rails in regards to amperage. We still follow reviews good and bad and will continue to do our best to improve. (there is always room for improvement).

In regards to your case, i believe a rep has emailed you with a satisfactory solution.
Edited by CoolerMasterUSA - 7/18/12 at 9:59am
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post #28 of 96
7/18/12 at 10:15am
Quote:
Originally Posted by CoolerMasterUSA View Post


I have checked Johnnyguru reviews. He tends to focus on the 12V and 12V only. Total wattage is not only determined from the 12V rail but from all the rails including 5V, 3.3V etc. which add up to equal the total wattage of the power supply. If you check his results and compare them to what is listed on the power supply itself (the table showing Amperage for each rail) you will see he neglects the other rails in regards to amperage. We still follow reviews good and bad and will continue to do our best to improve. (there is always room for improvement).
In regards to your case, i believe a rep has emailed you with a satisfactory solution.

Do you think that most computers draw much more power from +5V and +3.3V? Particularly gaming computers, which may possibly be the focus of the GX line?

Anyway, also see here:
http://www.hardwaresecrets.com/article/Cooler-Master-GX-750-W-Power-Supply-Review/917/7

Just saying, that this has been the reputation of the (old) GX series line, for a reason.


Anyway, this user's situation was handled properly, so that's that. At least for this person—maybe not for anybody else with the RS-750-ACAA-E3 that actually has a system that can fully test its supposed limits.
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post #29 of 96
7/18/12 at 10:19am
Quote:
Originally Posted by Phaedrus2129 View Post

The GX750 is a 450W power supply. Demonstrably so. Ripple on the +3.3V rail goes out of spec at 450W; the +12V rail goes out of spec at 550W. That's pathetic. The "revised" version released after the terrible JonnyGURU reviews only stayed on store shelves for a couple months before production was switched back to the higher-margin crap version.

The GX 750 is a 750W powersupply. In regards to johnnyguru's unit, if its out of spec, it is deemed faulty. If it is deemed faulty, we replace it. That is what warranty is for. Keep in mind, johnnyguru tests 1 or 2, and he doesn't say where he got it from or doesn't provide cooler master with the serial number to identify the lot number so we can double check on it and see if there is a bad batch or just a bad unit. Highly doubt 86 people ( going by newegg) had this trouble.

To sum it up, does he have valid points for us to investigate? yes, definitely. Is it a guarantee that all units will have this problem: no. If you have a problem with ANY product, please let us know so we can rectify the problem.
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post #30 of 96
7/18/12 at 10:19am
Quote:
Originally Posted by CoolerMasterUSA View Post


I have checked Johnnyguru reviews. He tends to focus on the 12V and 12V only. Total wattage is not only determined from the 12V rail but from all the rails including 5V, 3.3V etc. which add up to equal the total wattage of the power supply. If you check his results and compare them to what is listed on the power supply itself (the table showing Amperage for each rail) you will see he neglects the other rails in regards to amperage. We still follow reviews good and bad and will continue to do our best to improve. (there is always room for improvement).

You're full of crap.

Modern PCs draw 80%-95% of their total power from the +12V rail. Only 5%-20% is drawn from the +5V and +3.3V, and usually no more than ~3W from the +5VSB and -12V (when system is on; up to a couple amps from +5VSB possible when system is off). Additionally, the +5V/+3.3V have a combined wattage rating in most PSUs since they generally share a transformer tap and that circuit has a maximum wattage rating. This value is typically between 100W and 150W, and you'll see that JonnyGURU generally gets into that ballpark when testing PSUs with wattage high enough to make that reasonable.

CoolerMaster does have room for improvement. I could certainly help with that improvement, but so far you folks have shown no interest in moving in that direction. How can I blame you, when you're selling $20 300W PSUs as 500Ws for $50 a piece at Fry's?
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