coolericed Posted January 3 Share Posted January 3 Hi all, Hope im in the right spot, since i can not pick the specific forum ie Power supplies it JUST WON'T let me select it! Anyway i am eyeballing the Corsair HXi1500W PSU which according to forum posts online has passed Intel/Cybernetics for the ATX 3.0. So this PSU can handle the transient spikes up to 3 times? Planned system = Intel i7-13700K and a MSI RTX 4090 Trio X and a Z790 mb. Will use 70% power plan on the RTX 4090 and will power cap the i7-13700K to 115w (PL-1:115w PL-2: 115w) Is there a link to see if the HXi truly has the ATX3.0 label? Yet i wonder WHY the effort in making a ATX 3.0 and PCIE5 PSU's? These new psu's can communicate with the GPU for tighter current control and most likely the new units are better build ie higher quality due to the tighter voltage control? If its not the case then there should be no need for any ATX3.0-PCIE5 psu's yet they are coming...for a reason no? Anyway with my settings and hardware used should i be worried for any possible transient power spikes? Or any voltage issues that may impact my system or even damage it over longer periods that is what bothers me greatly what are the impacts of this HXi + RTX 4090 in say a year? Thanks in advance Link to comment Share on other sites More sharing options...
LeDoyen Posted January 3 Share Posted January 3 the HX1500i will power your build with ease even overclocked. no need to reduce power limits. it's just so overkill for the build it won't really break a sweat. From what i understood from an earlier comment from jonnyguru, most of the current high end corsair PSUs (before the new HXi came out) were already "ATX3.0 compliant", meaning, internally they met the new specifications already but were obviously not officially certified. As for the HX1500i exact certifications, i'll let corsair answer since the documentation is always as barebones as it comes. Link to comment Share on other sites More sharing options...
coolericed Posted January 3 Author Share Posted January 3 13 hours ago, LeDoyen said: the HX1500i will power your build with ease even overclocked. no need to reduce power limits. it's just so overkill for the build it won't really break a sweat. From what i understood from an earlier comment from jonnyguru, most of the current high end corsair PSUs (before the new HXi came out) were already "ATX3.0 compliant", meaning, internally they met the new specifications already but were obviously not officially certified. As for the HX1500i exact certifications, i'll let corsair answer since the documentation is always as barebones as it comes. Thank you for the reply, Well PCIE5 has to do with the bandwith but no iisue for me with a 4090. ATX3.0 that one IS important since it is tied with voltage regulation i dont mind if their PSU the HXi = ATX3.0 certified but NOT PCIE5. Wait was it double transient spike or tripple? But i do read that the HXi 1000 and 1500 models passed the ATX3.0 hopefully i should be good with any of these units. Power cap is for less power consumption without loosing much performance ie 70% power limit is close to stock performance (check de8auer on YT on the power plan for 4090). And power cap for the cpu at 115watt has pretty much no difference then a i7-13700K at FULL power draw of 250+ watts. Link to comment Share on other sites More sharing options...
LeDoyen Posted January 3 Share Posted January 3 i believe it's triple. but anyway, even current PSUs do cope with it if you keep a little bit of headroom. People routinely run 4090s even with 850W PSUs and don't experience problems. PSU manufacturers don't stick to the ATX spec to the letter. like, ripple on the 12V rail is spec'ed at 120 mv peak to peak which is horrendous. a HXi will have maybe 1/4 of that or less. the spec is really a minimum requirement, that's why many modern high end ATX 2.# PSUs already match most if not all of ATX 3.0 electrical requirements (except the 12VHPWR connector). When you talk of HXi, or AXi, they are way above ATX 2 spec, same for the high end of other brands. Link to comment Share on other sites More sharing options...
coolericed Posted January 5 Author Share Posted January 5 (edited) Thanks for the reply So i found posts on reddit and overclock telling that the HX1000i and HX1500i have passed the ATX3.0 spec well the problem is NO link is provided to back their claims up! Which is really frustrating they keep saying it has passed the ATX3.0 from some discord chat with Corsair....Yet when you visit Cybernetics site NO ATX3.0 mentioned for both the HX1000i (2022) and HX1500i (2022) models.....I just wonder where did they came up with the "it passed the ATX3.0" do you know? I am also looking at: MSI MPG A1000G PCIe5 - which HAS ATX3.0 and PCIE5 yet when i look at Cybernetics this UNIT isn't even listed (yet) only the 1300w pl version which did pass the ATX3.0. OEM = CWT same OEM on the HX1000i and HX1500i correct? Edited January 5 by coolericed Link to comment Share on other sites More sharing options...
coolericed Posted January 13 Author Share Posted January 13 So i got the HX1500i (2022) I used a PSU tester hooked up the 24pin - gpu - cpu - molex cables: Is a PG rating of 90ms normal for THIS unit the HX1500i? Everything else seems within spec for the voltages on 12v - 5v - 3v correct? Please help/advise before i hook this up on my expensive rig. Thanks in advance. Link to comment Share on other sites More sharing options...
LeDoyen Posted January 13 Share Posted January 13 yep it is.. if it's not, the CPU will not allow startup anyway. Officially, the spec is like between 100 and 500ms, but i have not yet seen any PSU going beyond 100ms. Most are below that. Link to comment Share on other sites More sharing options...
coolericed Posted January 13 Author Share Posted January 13 11 hours ago, LeDoyen said: yep it is.. if it's not, the CPU will not allow startup anyway. Officially, the spec is like between 100 and 500ms, but i have not yet seen any PSU going beyond 100ms. Most are below that. Thx for the reply, You said: :yep it is"...? What do you mean? is 90ms normal for this unit? Link to comment Share on other sites More sharing options...
LeDoyen Posted January 13 Share Posted January 13 yes it's normal. The CPU will take care of it anyway. if the power good is too quick or too slow, it will not allow boot, but you won't damage anything. If any of the voltages is bad at startup, or goes bad in use, the PSU will cut the PG signal and the CPU will shut off the PC and you won't damage anything either. Link to comment Share on other sites More sharing options...
coolericed Posted January 14 Author Share Posted January 14 2 hours ago, LeDoyen said: yes it's normal. The CPU will take care of it anyway. if the power good is too quick or too slow, it will not allow boot, but you won't damage anything. If any of the voltages is bad at startup, or goes bad in use, the PSU will cut the PG signal and the CPU will shut off the PC and you won't damage anything either. Alright thanks for the reply. Makes me less at an edge knowing this is normal for latest gen psu's. Link to comment Share on other sites More sharing options...
coolericed Posted January 14 Author Share Posted January 14 But one thing according to this review: https://www.igorslab.de/en/corsair-hx1500i-power-supply-test-even-without-atx-3-0-a-juicy-power-source-for-enthusiasts/5/ (Look for Timings, 2nd and 4th image.) It reads: 145ms why is this because the PSU is hooked up to MB - cpu etc? Is there a difference between PG on just a bare psu tester AND on a full system? Confused...I hope this is all good and im worrying to much. Link to comment Share on other sites More sharing options...
coolericed Posted January 14 Author Share Posted January 14 And another one: https://www.techpowerup.com/review/corsair-hxi-series-1500-w/8.html (Look for Timing T3.) Link to comment Share on other sites More sharing options...
LeDoyen Posted January 14 Share Posted January 14 yes you worry too much ^^ I can already imagine the first question Jonnyguru would ask you here : "but does the PC boot?" just plug everyrhing and start it. if there's any issue, at all, it won't boot and that's it. the psu and the cpu have interlocked safeties everywhere Link to comment Share on other sites More sharing options...
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