DC Load Regulation and AC Ripple
DC Output Load Regulation
To simulate real world and maximum loading conditions, the Corsair AX1500i PSU was connected to the load testers and supplied with a constant 115 VAC. In this test we are interested in seeing how well a PSU can maintain the various output voltages while operating under different loads.
The ATX12V V2.2 tolerance for voltages states how much each output (rail) is allowed to fluctuate and has tighter tolerances now for the +12V outputs. I have also included a second table of expanded tolerances (±1% to ±6%) for reference.
The following tables list the DC voltage results for the PSU while operating on 115 VAC, 60 Hz.
As you can see, the AX1500i produced outstanding load regulation on all of the outputs across a broad range of loads. Corsair isn’t kidding when they claim ±1.0% regulation on the +12V rail. Even when delivering over 100 amps, the +12V rail stayed well within ±1.0%. These are the best voltage regulation numbers we have seen from any power supply tested to date!
AC Ripple and Noise on the DC Outputs
The amount of AC ripple and noise present on the DC outputs was checked using a digital oscilloscope. This AC component may be present in the KHz range where most switching power supplies operate or it may be more prevalent at the 60 Hz line frequency. We adjust the O-scope time base to look for AC ripple at both low and high frequencies. The ATX12V V2.2 specification for DC output noise/ripple is defined in the ATX12V Power Supply Design Guide.
Ideally we would like to see no AC ripple (repetitive) or noise (random) on the DC outputs – the cleaner the better! But in reality there will always be some present. I measured the amplitude of the AC signal (in millivolts, peak-to-peak) to see how well the power supply complied with the ATX standard. The following table lists the ripple/noise results during all of the load tests for the main output voltages of interest.
The AC ripple and noise suppression results for the AX1500i PSU were also outstanding with all of the rails staying way below the max recommended ATX guidelines and well within Corsair’s claimed less than 30mVpk-pk for the +3.3V and +5V rails and less than 40mVpk-pk for the others. Again, these are outstanding numbers and among the best we have seen to date, especially for these power levels.
Minor Weaknesses:
•
Minor Weaknesses:
• Corsair Link not supported in Win XP
lol really minor at this time…
indeed don’t think that someone buys this beast to run it on Win Xp… would be unbelievable 😀
Agreed… very minor!
I
Agreed… very minor!
I almost didn't include it but the issue did come up during my testing as I initially tried to install Corsair Link on one of my old CPU cooler test beds that happens to be sitting next to the PSU test equipment (have retained Win XP environment for consistency over the years). Pretty good PSU if that was the only "weakness" that came up during testing.
Any chance you will test the
Any chance you will test the 2 295X2’s on this?
Already tested in this
Already tested in this video.
http://www.youtube.com/watch?v=Co7luj9ILr4
More details to come.
Sorry, we had to send back
Sorry, we had to send back the second R9 295X2 card before the AX1500i arrived to me. :/
Oh ya I remember you
Oh ya I remember you mentioning that. Well maybe someday in the future!
This is the first time I have
This is the first time I have heard of ATX 12V 2.4. Whats new? I am considering buying a new PSU now I am interested to know.
Good question: according to
Good question: according to our technical expert at Corsair… "The only difference between ATX12V 2.3 and 2.4, AFAIK, is that the 2.4 has the Haswell testing (0 load on the +12V to see if the PSU can support the C6/C7 sleep states)."
It doesn’t meets the
It doesn’t meets the efficiency requirements for 80 plus Titanium for 240v , 80 plus Titanium for 240v at 50% load mute be 96% or higher.
Hi,
I am testing Link
Hi,
I am testing Link software on my machine :
Config:
At IDLE load, PCIe A all current values are shown as ZERO,
Does this software have some threshold, above only it can sense current properly?
Following is sample data:
AX1200i PCIe 1 (A) Main (V) Main (A) Efficiency (%) Power In (W) Power Out (W)
Date Time AX1200i AX1200i AX1200i AX1200i AX1200i AX1200i
9/26/2014 4:15 0A 237V 0.4A 82.47% 87.4W 72.0823229576928W
9/26/2014 4:15 0A 236V 0.4A 82.44% 87.2W 71.8877801636352W
9/26/2014 4:15 0A 236V 0.4A 81.73% 83.2W 67.9962986383872W
9/26/2014 4:16 0A 237V 0.3A 79.18% 71.55W 56.6555688749302W
9/26/2014 4:16 0A 237V 0.3A 79.18% 71.55W 56.6555688749302W
9/26/2014 4:16 0A 237V 0.4A 80.98% 79.4W 64.2982873744608W
9/26/2014 4:16 0A 237V 0.4A 80.98% 79.4W 64.2982873744608W
would this Corsair AX1500i be
would this Corsair AX1500i be enough for powering two motherboards?
I want to install in a single box Linux and Windows and would need a good graphics card for a 4K monitor