ATX3.0 psu’s and coil whine

Just realised those reports for the ATX3 Thermaltake PSUs are for the ATX sized versions. So not sure if its CWT that do the SF ones. The ATX ones do seem to have decent performance from what I can gather from reading threads about ripple, etc and the numbers on those reports.
I will keep an eye on the Cybenetics website to see if they update any further future SFX-L high wattage psu's. They seem to have some pretty detailed testing and i can post in the other forum for technical advice if needed which i can relay back to here.
 
Whilst not exactly the same, the Seasonic TX700 is supposedly able to do 969W before OPP kicks in. So there's some precedence with regards to PSU's being WAAAAaaaaayyyy overspec'd for the rating they are sold at. I think the typical PSU OPP is set at 10% or a bit more than that? And usually not close to 40%.
It does beg the question though, how much wear and tear does running these psu's at that wattage over a long period of time does to the components? Would hate to see one of these things go bang especially when coupled with expensive components.
 
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It does beg the question though, how much wear and tear does running these psu's at that wattage over a long period of time does to the components? Would hate to see one of these things go bang especially when coupled with expensive components.
I'm afraid the first part of your question will need a professional in that area. :) But I imagine the 12 year warranty and 700W goal is likely part of why it can hit this number, as in the worst case scenario over those 12 years (dust, poor management of heat dissipation, constantly over 800W power, etc) this heavy level of overspec likely means even at the end of those 12 years, it can meet a 700W + 10% OPP delivery still.

Personally, I agree. I wouldn't want to push the PSU at these beyond sales spec numbers all the time and then see components die from it. I'm only interested in this (TX700) PSU's OPP level because I was wondering if it could power a 7900XTX with my current new system. And the total power draw would according to all calculators put it between 690W and 770W, which if normal 10% OPP, would have been a sure fail due to how close it borders that number. But with the knowledge it can hit 969W befre OPP kicks in (believe me, I was like.... :confused: :eek: :confused:), I feel safer knowing I can fit that 7900XTX in there and take any transient spikes that might take it beyond. But I'm still only aiming for as close to 700W as possible. Not trying to drive it to the max.
 
It does beg the question though, how much wear and tear does running these psu's at that wattage over a long period of time does to the components? Would hate to see one of these things go bang especially when coupled with expensive components.

I had a super flower platinum rated for the last 5 years and have had zero issues with whine on that I've had a 1080ti a 3090fe and now an XTX, recently swapped it for an EVGA platinum that I had lying around the OEM on that is also super flower afaik and again zero issues maybe its the brand maybe its the rating who knows. The only card I ever had issues with was a 1080 evga that absolutely screamed but was with an old zalman PSU that subsequently failed so maybe it is all about the brand and "you get what you pay for" I honestly don't know.

Seems its CWT for the Thermaltake ones. Not sure if they are any good.

TT and CWT are not names you want to hear together in my experience CWT have traditionally a poor reputation and TT well I had one of their cases once and can honestly say its the worst I've ever owned very poor materials and construction.
 
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Just following up on this, started building my system yesterday and had all manner of issues. The ThermalTake PSU has coil whine, I'm assuming it sounds the same as the Asus PSU as it sounds like a failing hard drive!

It also doesn't work with my 4090, it just doesn't power up. And the card is good as I hooked it all up out of the case with an EVGA ATX PSU and it all worked.
 
Just following up on this, started building my system yesterday and had all manner of issues. The ThermalTake PSU has coil whine, I'm assuming it sounds the same as the Asus PSU as it sounds like a failing hard drive!

It also doesn't work with my 4090, it just doesn't power up. And the card is good as I hooked it all up out of the case with an EVGA ATX PSU and it all worked.

Oh man thats bad, any idea what could be causing the gpu not to work? Did you connect using the native 12vpwr cable that comes with the psu or did you try using the adapter?

Maybe a bad cable?

Yup thats exactly how mine sounded like but different games produce different sounds, one would make it sound like a failing hard drive where as the other would make it sound like an electrical pylon buzz!
 
Oh man thats bad, any idea what could be causing the gpu not to work? Did you connect using the native 12vpwr cable that comes with the psu or did you try using the adapter?

Maybe a bad cable?

Yup thats exactly how mine sounded like but different games produce different sounds, one would make it sound like a failing hard drive where as the other would make it sound like an electrical pylon buzz!
I used the cable that came with the PSU. Perhaps because it has those sense wires, the GPU is not getting enough juice so doesn't power on. There are no lights or fans spinning on the GPU when I power it up. Bummer as SFX PSUs are out of stock everywhere!
 
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I used the cable that came with the PSU. Perhaps because it has those sense wires, the GPU is not getting enough juice so doesn't power on. There are no lights or fans spinning on the GPU when I power it up. Bummer as SFX PSUs are out of stock everywhere!
Very odd, my Loki has the native cable as well but it has sense pins on both ends so i assume it will just work.

Is it the 1000w version you have?

Maybe try using the adapter that does 12vhpwr to 4x8pin pcie?

I have a sneaky feeling it maybe a faulty cable.

I've seen 4090's been powered by 750w psu's so it should be more than fine assuming you have the 1000w version or even the 850w version.
 
Very odd, my Loki has the native cable as well but it has sense pins on both ends so i assume it will just work.

Is it the 1000w version you have?

Maybe try using the adapter that does 12vhpwr to 4x8pin pcie?

I have a sneaky feeling it maybe a faulty cable.

I've seen 4090's been powered by 750w psu's so it should be more than fine assuming you have the 1000w version or even the 850w version.
I have the 750w version as the others were out of stock. I'll try the standard PCIe cables with the nVidia adapter and see how I get on.
 
Okay you're too limited, not enough cables natively to make it work but i don't understand why the native 12vhpwr cable isn't powering the gpu. Did you plug it in the correct way? I think the cable may only work one way? Worth a check!

With my Loki i got a 12vhpwr native cable and a 12vhpwr to 2x6+2pin pcie cable along with a single 2x6+2pin pcie cable so i could power a 4x8pin pcie gpu if whatever reason the native cable didn't work.

There just isn't enough cables to make yours work unless the PCIe (6+2Pin) has 2 ends on each cable so effectively its a 4x(6+2pin) pcie but according to the specs its not.
 
If your psu came with this sort of cable then it could work to test out whether its a faulty cable or not.

I also checked the specs of the 850w version and weirdly the amount of cables is the same. I'm guessing its a limitation of the SFX form factor as i think its not a SFX-L unless im looking at the wrong product.


(Stock image of Asus Loki 850w cable package)
 
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Unfortunately it only comes with a single cable with a daisy chain on it, so 2 connections. Perhaps the 4090 only power up if the power source is capable of feeding it 450w? Which is why it's not powering up as I know with my ATX power supply, it has to be connected via 3 PCIe connections, with 2 it won't power up. I'm guessing the power supply is communicating to the card that it can only supply 300w.
 
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Unfortunately it only comes with a single cable with a daisy chain on it, so 2 connections. Perhaps the 4090 only power up if the power source is capable of feeding it 450w? Which is why it's not powering up as I know with my ATX power supply, it has to be connected via 3 PCIe connections, with 2 it won't power up. I'm guessing the power supply is communicating to the card that it can only supply 300w.
This is a possibility, however with the native 12vhpwr cable it should be able to deliver the full 600w from that one rail. According to the spec sheet the 12v rail should be able to deliver the full 750w at 62.5amps so should be no problem powering the 4090 at bootup.

Shame there's no way to test it, i would return it tbh and think about getting the 1000w version when available as that has the necessary cables and its also SFX-L provided that form factor works in your case.
 
Going to just get a Corsair SF750 for now. I usually run an UV on my 4090 anyway so it should be able to handle it until the PSU market settles down.
The SF750 is a great unit, used it for a good part of a year before i upgraded. Only thing i didn't like was the noisy fan during loads like gaming. No coil whine either so that's a plus!
 
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