Sabishii Hito
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I saw a thread about the X79 Dark board having issues with Seasonic-based PSUs, In my testing the Z97 Classifed also will not power on when connected to two different power supplies based on a Seasonic design (Corsair AX860, CoolerMaster V1200). Just an FYI.
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the_Scarlet_one
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Re: Z97 Classified & Seasonic-based PSUs
2014/10/08 19:51:38
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I wonder what causes this! I had the same problem. Seasonic 1050w on the x79 Dark. I actually sent the board back and found this issue after getting an RMA board. Sorry you are going through the same issue.
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mongolianmonday
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Re: Z97 Classified & Seasonic-based PSUs
2014/10/30 23:53:06
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I have RMA'd one Classified z97 board because it wouldn't power on. The replacement board is doing the exact same thing. I have a SeaSonic SS-760XP2 PSU and a SeaSonic SS-660XP2 PSU :(
post edited by mongolianmonday - 2014/12/10 00:55:06
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Alex M.
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/07 15:23:52
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Hi, I have exactly the same problem with Z97 Classified and Seasonic 760Watt Platinum PSU. I thought first that the PSU would be defective, Seasonic has sent me a new one but the problem is still there.
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xbiker321
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/07 21:54:31
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Well this is splendid, I just bought parts for a new, expensive, build. Seasonic 1050w platinum PSU, Z97 Classified, and yup, not compatible. This should have been addressed by EVGA and listed on their listings when purchasing this $400 motherboard... Not too pleased.
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the_Scarlet_one
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/07 22:02:10
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No, seasonic is the issue here honestly. It is how they set up their cables. SINGULARITY COMPUTERS goes into this in one of the build log about ompatibility issue that seasonic has with many things. I am not taking EVGA's side here, but most PSU companies set it up to where two cables can power on the PSU but seasonic requires at least 4, so it is their problem, not EVGA here.
Even when running 2 PSUs to a very demanding system, normally you jump the green wire and a ground.. Seasonic requires the use of 4very specific cables, and has compatability issues with more than one company/product so it seems.
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xbiker321
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/07 22:37:05
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Thanks for the quick response! Is there anything I can do to this Seasonic 1050w Platinum PSU to get it to work? Splicing wires or whatnot..
I see you're in Korea, my unit went there while I went to Iraq, lol. I hear I missed out on a lot of drinking.
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the_Scarlet_one
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/07 22:57:05
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Iraq was 100x better than this place. I say that with an open heart after spending 6 months in Kirkuk. Lots of drinking here. I don't drink often, and I like working, so I enjoyed Iraq a LOT.
I could not find a fix, aside from replacing the PSU. This may sound like an advertisement for EVGA, and I almost hate to say this, but the 1000G2 and 1300G2 are both really nice powers supplies with some pretty nice cables.
The individually sleeved cables that are available are also really nice.
Enermax makes some great PSUs as well. I currently have two, and like both a lot. Their cables aren't so nice though.
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xbiker321
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/07 23:10:59
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The cable management with the Seasonic 1050 was so nice, easy, and visually appealing.. even the PSU itself is nice looking. I really wish I could keep it. I called EVGA tech support earlier tonight (before I found this thread) and he couldn't help so they put in a case number and will have someone calling me in a day or two. Probably just telling me it isn't compatible. I just never would have thought a brand new motherboard and a brand new power supply wouldn't be compatible with one another.
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the_Scarlet_one
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/08 02:28:34
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I had the same issue with the x79 Dark, and really liked my PSU, but since it was the issue, I got rid of it. You could get a new motherboard, but it may just be easier to get a new PSU in the end. It all depends on what you decide is easier honestly.
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nmk64
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/08 05:39:24
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Scarlet-Tech
No, seasonic is the issue here honestly. It is how they set up their cables. SINGULARITY COMPUTERS goes into this in one of the build log about ompatibility issue that seasonic has with many things. I am not taking EVGA's side here, but most PSU companies set it up to where two cables can power on the PSU but seasonic requires at least 4, so it is their problem, not EVGA here.
Even when running 2 PSUs to a very demanding system, normally you jump the green wire and a ground.. Seasonic requires the use of 4very specific cables, and has compatability issues with more than one company/product so it seems.
Hi, can you please explain what is this 2 wire vs 4 wire thing in order to boot the Seasonic PSU?
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the_Scarlet_one
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/08 06:13:21
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nmk64
Hi, can you please explain what is this 2 wire vs 4 wire thing in order to boot the Seasonic PSU?
Normally, when you want to "Jump" a second PSU from a main one, so that both run simultaneously, you use a small jumper that connects the PC-on and the Ground:   While using 2 Seasonic Powersupplies, Singularity computers found that they couldn't jump the second PSU the traditional way in which he starts discussing the issue at 15:10 : I was wrong about it being 4 wires, as it is actually 3 after watching the video again. You need to run the traditional green (pc on) and black (ground) plus another ground that he doesn't go into great detail about which one it takes. Unfortunately, I do not have a Seasonic PSU anymore, of I would beat myself senseless trying to figure this out, or blow up the powersupply, which ever came first.
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nmk64
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/11 07:57:01
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Ok, thanks for the update. I contacted Sea Sonic and they said the extra wires are needed otherwise the protection circuits will kick in. I guess the other PSUs don't have such protection circuits? I would guess it is better to have the protection than not considering it was never really intended to use 2x power supplies per single system?
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waldojim
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/11 12:06:28
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On the subject of suggesting other PSU's, it is worth noting that according to the professional reviews, EVGA does have some top-notch power delivery on their supernova units. Haven't gotten one yet personally, but thought it was worth mentioning... I still use my trusty PC Power and Cooling Silencer. http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=380 Much beautiful power.
Laptop/gaming rig: Alienware 14. Intel 4700mq, 8GB ram @ 1600Mhz, nvidia GTX765m, Plextor M3 SSD 256GB, 1080P IPS display
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xbiker321
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/12 01:00:17
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In JaysTwoCents video on youtube, he was using the Cooler Master v1200w power supply built by Seasonic. Same OCP problem for him. He had to ditch it and use an EVGA 1000w for his build in the video. I uploaded (Search YouTube for " Seasonic and EVGA Z97.. OCP") I had the Seasonic 1050w xp3 installed in the case and hooked up to everything, so it being outside the case and hooked up to the 24pin and 8pin CPU is irrelevant in the video. When inside the case, and outside the case, it was able to turn on an older Asus P8P67 motherboard just fine. The OCP is only tripped when using the EVGA Motherboard. edited because I cannot post links on the forum..
post edited by xbiker321 - 2014/11/12 01:08:10
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xbiker321
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/12 01:00:19
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I just wanted to reiterate that I am just wanting to use ONE power supply, not two. I know other members here wanted to use a Seasonic PSU as a second PSU and weren't able to. In JayzTwoCents review he had just ONE cooler master v1200 (built by Seasonic) and he had the same OCP trip that I am having on a Seasonic 1050w xp3. I'm currently in contact with both Seasonic and EVGA customer support and they both are looking into this. Seasonic customer support is very responsive btw, I'd hate to not use their quality products.
post edited by xbiker321 - 2014/11/12 10:42:54
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mongolianmonday
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/12 01:30:32
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EVGA should really have a compatibility list because their techs are completely clueless about this issue. Very disappointed in EVGA right now. My brand new board didn't have to be sent in for someone else's rejects (twice) and now I have to find a compatible PSU to replace my Seasonic's. Does anyone know if the Cooler Master V550 PSU will work with the Classified Z97? I heard they are Seasonic OEM like Corsair's.
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xbiker321
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/12 10:43:48
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mongolianmonday
EVGA should really have a compatibility list because their techs are completely clueless about this issue. Very disappointed in EVGA right now. My brand new board didn't have to be sent in for someone else's rejects (twice) and now I have to find a compatible PSU to replace my Seasonic's. Does anyone know if the Cooler Master V550 PSU will work with the Classified Z97? I heard they are Seasonic OEM like Corsair's.
I hear ya, I just threw over $500 at a power supply and motherboard that aren't compatible, like I said I am in touch with both companies right now.
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ttingley
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/18 15:31:07
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Are all SeaSonic power supplies incompatible with the Z97 Classified? I just got a brand new Seasonic X-1250 (SS-1250XM2) for a really good deal and I would really hate to have to return it. I'm still waiting on the motherboard, but I'd hate to open up the PSU and find out it's incompatible. It'd be nice to see if there was an official statement concerning this issue.
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jll544
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/18 19:55:51
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Scarlet-Tech
While using 2 Seasonic Powersupplies, Singularity computers found that they couldn't jump the second PSU the traditional way in which he starts discussing the issue at 15:10 : I was wrong about it being 4 wires, as it is actually 3 after watching the video again. You need to run the traditional green (pc on) and black (ground) plus another ground that he doesn't go into great detail about which one it takes. Unfortunately, I do not have a Seasonic PSU anymore, of I would beat myself senseless trying to figure this out, or blow up the powersupply, which ever came first. Actually, the video shows the three wires around the 16:40 mark: On the 10-pin PSU connector, pin 5 (PS_ON#) On the 18-pin PSU connector, pin 5 (GNDs) and pin 6 (GND) According to the available pinouts, the two ground wires correspond to pins 3 and 5 on the 24-pin MB connector. If someone with a Z97 Classified has a multimeter, it would be interesting to know if there's continuity between those pins on the MB.
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THX_Engineer3
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Re: Z97 Classified & Seasonic-based PSUs
2014/11/28 13:04:18
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Was anyone able to figure out a workaround for this, other than a new PSU? I think I can add another PSU to the incompatibility list: Corsair AX860i isn't compatible with the Z97 Stinger 3D board (I know the AX860 was mentioned earlier in the thread, but it seems the "digital" version of the PSU has the same issue). The PSU actually boots the system, the CPU fan spins up, then as the CPU fan slows down, the PSU just shuts off. The PSU will sit there cycling itself trying to boot the system, then dying. It has nothing to do with the OS (Linux Mint 17, BTW) because I can go straight into the BIOS configuration and the PSU still shuts off within a few seconds of running.
What's crazy is that I have a ancient Corsair CX500 PSU that boots everything just fine, so I don't think it's a motherboard defect, just a compatibility issue.
Not sure whether to return the Corsair PSU or Z97 (read my other thread with this board's immature BIOS issues). I like both, but this is just frustrating!
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Mackan42
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Re: Z97 Classified & Seasonic-based PSUs
2014/12/10 11:03:21
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THX_Engineer3
Was anyone able to figure out a workaround for this, other than a new PSU? I think I can add another PSU to the incompatibility list: Corsair AX860i isn't compatible with the Z97 Stinger 3D board (I know the AX860 was mentioned earlier in the thread, but it seems the "digital" version of the PSU has the same issue). The PSU actually boots the system, the CPU fan spins up, then as the CPU fan slows down, the PSU just shuts off. The PSU will sit there cycling itself trying to boot the system, then dying. It has nothing to do with the OS (Linux Mint 17, BTW) because I can go straight into the BIOS configuration and the PSU still shuts off within a few seconds of running.
What's crazy is that I have a ancient Corsair CX500 PSU that boots everything just fine, so I don't think it's a motherboard defect, just a compatibility issue.
Not sure whether to return the Corsair PSU or Z97 (read my other thread with this board's immature BIOS issues). I like both, but this is just frustrating!
Seasonic make many of Corsair's PSUs, so no surprise it has the same problem. Seasonic is big, so I'm not sure why EVGA would want to ship motherboards for many years that are incompatible with their PSUs, while other motherboard manufacturers don't seem to have the same problem.
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mongolianmonday
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Re: Z97 Classified & Seasonic-based PSUs
2014/12/10 11:45:48
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Just want to add that both of my Seasonic PSU's (ss-660xp2 and ss-760xp2) works perfectly with ASRock Z97 Extreme6 and Gigabyte Z97 Sniper boards while both PSU's failed on the EVGA Z97 Classifieds (3 boards total! 1 new, and 2 replacements). There has to be something EVGA is doing differently with these boards (FTW's and Classified's). I had an older EVGA board (Stinger) that worked perfectly with the Seasonic ss-660xp2 PSU.
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tyler13391
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Re: Z97 Classified & Seasonic-based PSUs
2014/12/22 03:22:02
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I'm actually running a EVGA Z97 Classified on a Corsair AX860 and it works perfectly.
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dave7798801
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Re: Z97 Classified & Seasonic-based PSUs
2014/12/29 20:35:13
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I just build a new system with a Asus Sabertooth Z97, Haswell 4790k and a Thermaltake Toughpower XT 575W and it would not power up at all. Found this on Corsair's site: http://www.corsair.com/en-us/support/faqs/power-supplies (scroll down to near the bottom) They're saying the problem is with Haswell's very low power consumption when the system is powered down kicking in the PS's protection circuit when you turn on the computer. Their work around was to hold down the power button while turning on the PS switch which does work on my system. Have a Corsair HX 750 coming to replace the Thermaltake. Hopefully it will be work, Corsair's site says it is Haswell compatible.
Asus Sabertooth Z97 Mark14790k Noctua NH-U12S CoolerEVGA GTX970SCSamsung 850 Pro SSD
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the_Scarlet_one
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Re: Z97 Classified & Seasonic-based PSUs
2014/12/29 20:38:57
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That is good information, Dave######## (too many number lol)
That would be a real hassle every time while trying to get the computer to boot. Seasonic did this on the x79 platform as well, so it isn't specific to haswell, but definitely makes sense for both.
Thanks for sharing.
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dave7798801
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Re: Z97 Classified & Seasonic-based PSUs
2014/12/29 21:17:30
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It's not too bad. It will reboot OK, only have to do it when I do a shut down. Haven't tried sleep yet but I don't think I'll use sleep much anymore since it boots up so fast with the SSD. Hope the Corsair takes care it.
Asus Sabertooth Z97 Mark14790k Noctua NH-U12S CoolerEVGA GTX970SCSamsung 850 Pro SSD
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dave7798801
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Re: Z97 Classified & Seasonic-based PSUs
2014/12/31 21:16:00
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Just got done putting in the HX750, same power up issue. Guess it's time to call Asus support.
Asus Sabertooth Z97 Mark14790k Noctua NH-U12S CoolerEVGA GTX970SCSamsung 850 Pro SSD
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mongolianmonday
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Re: Z97 Classified & Seasonic-based PSUs
2014/12/31 23:32:27
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i'm finally up with a BitFenix Fury 750 PSU. beautiful cables. looks really nice with the z97 classified. even has connectors for both the cpu connections on the z97 classified for a more stable overclocking. but now i want to ditch this whole setup and go mini itx haha
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dave7798801
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Re: Z97 Classified & Seasonic-based PSUs
2015/01/02 10:17:20
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Found out the problem. The Asus board has a button on the I/O panel that allows bios updates from a flash drive. I was looking everything over before calling Asus support and saw that the I/O shield was holding the button down, popped it up and it now powers up normally.
The Thermaltake PS may have worked too but I would have preferred a Corsair PS. I didn't want to wait for one and the Thermaltake was the best I could find locally so I guess it worked out for the best anyway.
Asus Sabertooth Z97 Mark14790k Noctua NH-U12S CoolerEVGA GTX970SCSamsung 850 Pro SSD
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