Psu with the lowest tolerance and highest efficiency...

[Memphisto]

Hey there Guys!

I was wondering if the more expensive Powersupplies have a lower tolerance than others...
At the moment i am using a Inter-Tech Nobility NitroX 900 Watt which is 80 Plus Silver rated...

Recently i upgraded my Computer.. now i got a 7700k @5.1 GHz on a Asus ROG Maximus IX Apex Motherboard with 16 Gb of G.Skill 4266 Mhz RAM..

In the process of overclocking i noticed that the 12V under heavy load sometimes spiked to 12.78 Volts... and the 3.3 Volt were at 3.51 Volts...
Most of the time they where in the 5% tolerance but i dont like those spikes and also think those could also be a thing why i have problems getting the system as stable as i want...

Soo to the point of my question:
I have already searched but didnt find any useful information.... does anyone know which powersupply has the lowest tolerance or do all of them just have the 5% tolerance when they are new?

I am thinking about buying a platinum or titanium rated PSU but i also want a low tolerance if that is possible....
Maybe that will also reduce the coil whine of my GTX 1080??


Thanks!
Greez Memphisto

 

[the nerd 389]

The regulation capabilities of PSUs varies widely. Your's is pretty bad.

The best PSU out there is the Corsair AX1200i.

The PSU is (probably) not responsible for coil whine on the GPU. Your PSU is pretty bad, so it might have significant coil whine.

 

[Memphisto]

The regulation capabilities of PSUs varies widely. Your's is pretty bad.

The best PSU out there is the Corsair AX1200i.

The PSU is (probably) not responsible for coil whine on the GPU. Your PSU is pretty bad, so it might have significant coil whine.

hey there nerd!
Thanks for the quick answer!

In which category is the Corsair ax1200i the best PSU?
You mean altogether or in terms of efficiency or tolerance?

Wouldnt the ax1500i be better?
Or are they the same, only that the 1500 is able to handle 1500 W compared to the other 1200 Watts?

thanks!

 

[the nerd 389]

The regulation capabilities of PSUs varies widely. Your's is pretty bad.

The best PSU out there is the Corsair AX1200i.

The PSU is (probably) not responsible for coil whine on the GPU. Your PSU is pretty bad, so it might have significant coil whine.

hey there nerd!
Thanks for the quick answer!

In which category is the Corsair ax1200i the best PSU?
You mean altogether or in terms of efficiency or tolerance?

Wouldnt the ax1500i be better?
Or are they the same, only that the 1500 is able to handle 1500 W compared to the other 1200 Watts?

thanks!

The AX1200i and AX1500i differ only in their rated output. They have the tightest regulation of any PSU on the market, only one PSU has better efficiency, and that's only in a narrow range of loads. At most loads, the AX1200i has the best efficiency available.

It also has the best protection features outside of the server market, and it's got one of the quietest fans out there.

For reference, see the entry for it here:
http://www.tomshardware.com/reviews/best-psus,4229.html

 

[Memphisto]

The regulation capabilities of PSUs varies widely. Your's is pretty bad.

The best PSU out there is the Corsair AX1200i.

The PSU is (probably) not responsible for coil whine on the GPU. Your PSU is pretty bad, so it might have significant coil whine.

hey there nerd!
Thanks for the quick answer!

In which category is the Corsair ax1200i the best PSU?
You mean altogether or in terms of efficiency or tolerance?

Wouldnt the ax1500i be better?
Or are they the same, only that the 1500 is able to handle 1500 W compared to the other 1200 Watts?

thanks!

The AX1200i and AX1500i differ only in their rated output. They have the tightest regulation of any PSU on the market, only one PSU has better efficiency, and that's only in a narrow range of loads. At most loads, the AX1200i has the best efficiency available.

It also has the best protection features outside of the server market, and it's got one of the quietest fans out there.

For reference, see the entry for it here:
http://www.tomshardware.com/reviews/best-psus,4229.html

Thanks again!
One last question then i'm happy

The Titanium Rating is of course at 115 Volts.... is there any website where i can look how efficient those Powersupplies are at 230 Volt?

Greetz Memphisto

 

[the nerd 389]

The Titanium rating has different requirements for 220V. Those requirements are more stringent at 220V than at 110/120V. In order for a PSU to be rated as 80 Plus Titanium, it must meet both requirements.

In a pinch, the efficiency curves for 110V can be treated as the minimum efficiency you will see at 220V.

 

[lrrelevant]

The regulation capabilities of PSUs varies widely. Your's is pretty bad.

The best PSU out there is the Corsair AX1200i.

The PSU is (probably) not responsible for coil whine on the GPU. Your PSU is pretty bad, so it might have significant coil whine.

hey there nerd!
Thanks for the quick answer!

In which category is the Corsair ax1200i the best PSU?
You mean altogether or in terms of efficiency or tolerance?

Wouldnt the ax1500i be better?
Or are they the same, only that the 1500 is able to handle 1500 W compared to the other 1200 Watts?

thanks!

The AX1200i and AX1500i differ only in their rated output. They have the tightest regulation of any PSU on the market, only one PSU has better efficiency, and that's only in a narrow range of loads. At most loads, the AX1200i has the best efficiency available.

It also has the best protection features outside of the server market, and it's got one of the quietest fans out there.

For reference, see the entry for it here:
http://www.tomshardware.com/reviews/best-psus,4229.html

Sorry for breaking it down to you, but that's wrong. The seasonic primes are more efficient and have tighter voltage regulation/ripple than the corsairs. Far better value than AXi aswell.

 

[the nerd 389]

Sorry for breaking it down to you, but that's wrong. The seasonic primes are more efficient and have tighter voltage regulation/ripple than the corsairs. Far better value than AXi aswell.

That happens to be the PSU I was referring to with regards to efficiency. It's better from about 200w to 300w. Outside of that range, the AXi is more efficient.

With regards to load regulation, the AXi clocks in at 0.14%, 0.26%, 0.39%, and 1.68% for the 12V, 5V, 3.3V and 5VSB rails.
The Seasonic clocks in at 0.23%, 0.28%, 0.42%, and 2.07% for the same.

With regards to transient response, on those same rails:
AXi: 0.62%, 1.30%, 3.12%, and 0.72%
Prime: 0.75%, 1.85%, 4.55%, and 0.84%

With regards to ripple (max values):
AXi: 17mV, 13.5mV, 12.4mV, 13.9mV
Prime: 13.8mV, 8.3mV, 14.5mV, 8.5mV

From these, we see that the Prime does have slightly better ripple ratings. Otherwise, it's a total wash for the AXi. That said, you are right in that the AXi is insanely expensive for what it is. The OP didn't ask for the best value, though. He asked about the best, and that's the AXi.

 

[lrrelevant]

Sorry for breaking it down to you, but that's wrong. The seasonic primes are more efficient and have tighter voltage regulation/ripple than the corsairs. Far better value than AXi aswell.

That happens to be the PSU I was referring to with regards to efficiency. It's better from about 200w to 300w. Outside of that range, the AXi is more efficient.

With regards to load regulation, the AXi clocks in at 0.14%, 0.26%, 0.39%, and 1.68% for the 12V, 5V, 3.3V and 5VSB rails.
The Seasonic clocks in at 0.23%, 0.28%, 0.42%, and 2.07% for the same.

With regards to transient response, on those same rails:
AXi: 0.62%, 1.30%, 3.12%, and 0.72%
Prime: 0.75%, 1.85%, 4.55%, and 0.84%

With regards to ripple (max values):
AXi: 17mV, 13.5mV, 12.4mV, 13.9mV
Prime: 13.8mV, 8.3mV, 14.5mV, 8.5mV

From these, we see that the Prime does have slightly better ripple ratings. Otherwise, it's a total wash for the AXi. That said, you are right in that the AXi is insanely expensive for what it is. The OP didn't ask for the best value, though. He asked about the best, and that's the AXi.

Thats funny, because on the jonnyguru reviews the AX1500i and AX1200i scored 0.4% and 0.76% respectively in average voltage regulation across 3.3, 5 and 12v rails. Seasonic Prime 850 and 750 scored 0.03% and 0.27% respectively. Total wash you say? Don't really get you on that one.

On a side note, the prime 850 touched 94.5% efficiency tops. The AX1500i only touched 93.6. Total wash? Don't think so. One does never in a lifetime need 1500W or 1200W for that matter, so it would be an absolutely complete waste to spend DOUBLE for watts you are never gonna come close to consuming with a single GPU or even 2, for that matter.

Prime 850 is the way to go.

 

[FullmetalJacket]

Why would you spend that much money unless you are doing High end studio sound recording for films or bands and need total silence you would have to have a massive server or super computer to use wattage's any where near that ,Your basically opening your wallet and throwing money out the window Even a ten core intel overclocked with 2 titans overclocked wouldn't even hit 800 watts You would have to use Xeon quads up to 12 core Cpus with crossfire or Sli studio design graphics processors to get up anywhere near 1200 to 1500.

 

[the nerd 389]

Sorry for breaking it down to you, but that's wrong. The seasonic primes are more efficient and have tighter voltage regulation/ripple than the corsairs. Far better value than AXi aswell.

That happens to be the PSU I was referring to with regards to efficiency. It's better from about 200w to 300w. Outside of that range, the AXi is more efficient.

With regards to load regulation, the AXi clocks in at 0.14%, 0.26%, 0.39%, and 1.68% for the 12V, 5V, 3.3V and 5VSB rails.
The Seasonic clocks in at 0.23%, 0.28%, 0.42%, and 2.07% for the same.

With regards to transient response, on those same rails:
AXi: 0.62%, 1.30%, 3.12%, and 0.72%
Prime: 0.75%, 1.85%, 4.55%, and 0.84%

With regards to ripple (max values):
AXi: 17mV, 13.5mV, 12.4mV, 13.9mV
Prime: 13.8mV, 8.3mV, 14.5mV, 8.5mV

From these, we see that the Prime does have slightly better ripple ratings. Otherwise, it's a total wash for the AXi. That said, you are right in that the AXi is insanely expensive for what it is. The OP didn't ask for the best value, though. He asked about the best, and that's the AXi.

Thats funny, because on the jonnyguru reviews the AX1500i and AX1200i scored 0.4% and 0.76% respectively in average voltage regulation across 3.3, 5 and 12v rails. Seasonic Prime 850 and 750 scored 0.03% and 0.27% respectively. Total wash you say? Don't really get you on that one.

On a side note, the prime 850 touched 94.5% efficiency tops. The AX1500i only touched 93.6. Total wash? Don't think so. One does never in a lifetime need 1500W or 1200W for that matter, so it would be an absolutely complete waste to spend DOUBLE for watts you are never gonna come close to consuming with a single GPU or even 2, for that matter.

Prime 850 is the way to go.

Fair enough. I still maintain that the AXi is a better PSU if only for the digital components that allow for features not available with the Prime.

Seriously, though, these PSUs are close enough that the differences in regulation are mostly academic. Both will outperform basic bench power supplies. If either one is insufficient, you aren't using the PSU for it's intended purpose.

 

[FullmetalJacket]

You make good points but because power supplies invariably don't reach peak efficiency curves until they are between 1/3 to 3/4 load . If you want to get the most out of any power supply you must match the systems power usage and pick the appropriate wattage depending on the hardware your using ,Specking up the power supply will not make the system more efficient,The Only thing that matters is the consistency of the power rails power delivery ,For components to run at peak performance without starving or overloading and the 80 plus rating and wattage.

 

[Memphisto]

If anyone is interested in what i ended up with...

I bought an Seasonic SSR-850TD...
I read many tests and in the end this one seemed to be one of the best PSU's in my needed Watt range..

Very low Tolerance in Voltage Regulation (0.5%.... ATX standard would be 5%) and it is 80 Plus Titanium Certified...
My Watt usage dropped by freaking 50 Watts! And the Volts also look very nice!

12V --> 12.096 V (most of the time.. sometimes 12.196)
5 V --> 05.000 V (exactly 5.0 Volt the whole time i watched it!)
3.3V --> 03.360V


So in conclusion:
I think this is one of the if not THE best powersupply for this Wattrange...
If you dont draw more than 50% of the 850 Watts over it the fan wont even turn on because it just doesnt need to...


If there is someone who chose the Corsair one.. i would be interested in how it turned out for him/her
Thanks again everyone
Greez Memphisto

 

[the nerd 389]

Bare in mind that motherboard voltage measurements are only accurate to +/- 5%. Also, they cannot be used to determine transient response or ripple. You'd need an oscilloscope for that.

 

[SENOR BURTOS]

thanks!

Firstly, A higher 80+ rating doesn't mean your power supply will be safer for your components or last longer.

It only means efficiency and even so, there are many PSUs out there that carry and 80+ logo and can't archieve the labeled efficiency. Hence many websites like johnnyguru, techpowerup, hardwaresecrets and this one test efficiency in all PSUS to make sure it is a real 80+ PSU and actually, there isn't a huge difference between an 80+ gold and 80+ titanium PSU wherein the titanium PSUS costs 2X more. 80+ titanium only saves you a couple of bucks in a year unless you are running a server

Secondly, buying a 1200-1500W for a system that uses a single graphics card is retarded. You are just wasting your money, the only reason for getting a 650+ PSU is either multi GPU setups or more silent PSUs. Maybe you could just consider it if the diffence in price were not so huge. This is not the case, that king of PSUs are rather overpriced

Now let's say you want a silent PSU, there are fanless and semifanless PSUs that cost less.

Thirdly, I really don't think AX power supplies are the best, corsair PSUs are a little bit overvalued, that is why they cost more. And it is and old power supply, I'd prefer Seasonic or EVGA supernova. Really comparable quality or even better (i.e seasonic prime series) at a lower price.

But it depends, The newer RMi and RMx series are flawless and the fans do not kick in under 40% load.

The point is, you do not need to spend that much money, a GTX 1080 and 7700K will be just fine with a good 550W power supply

Think about the options with that wattage, XFX fanless, seasonic semifanless, RMx like i said, etc.