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Poor OC / PSU Problem |
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Ky0sHiR0 
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 Topic: Poor OC / PSU ProblemPosted: 20 Dec 2016 at 7:24pm |
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Hello,
In October I bought computer with following specification (I built it) i5 6600K CPU Cooler Fortis 3 GTX 1070 Palit Super Jet Stream 2800 MHz DDR4 Corsair Vengeance LPX PSU Corsair CX450M The first case - Poor OC Im not able to get higher OC than 4,4 GHz @ 1,344 V its really really poor. What is more CPU is delidded and temps are low. Someone suggest me that my PSU isn't meet requirements for GTX 1070 and is a low tier PSU. In that case I bought FSP/Forton Hydro-G 750W from Tier One (PSU Tier list 2.0 etc.) and then... we are coming with second case - PSU Problem I mounted PSU and everything have gone right but... Everything is connected to my power strip - computer PSU, monitor, speakers etc. If I am out of home I turn off power strip and in that case : 1) When You are trying to turn on computer I just turn on power strip 2) Push ON button on my computer 3) PC starter for 2-3 seconds (fans test etc) and then power goes off 4) After 1 sec PC computer will turn ON and boot normally There was no problem with previous PSU (Corsair CX450M) I contacted AsRock and get following response: Dear Patrick,
This is not caused by the board. When you press the start button, you start the PSU, NOT the board, this is how it works: 1. The start button short circuits 2 pins in the big ATX power connector, sending the PSU a signal to start 2. The PSU runs a selftest 3. When the selftest is okay, and the system is stable and within specs, the PSU send a "Power Good" signal to the board 4. Then the board starts
I know for a fact this is PSU related, I had a Enermax PSU, and had this issue, when I replaced it for a XFX PSU, the problem was gone. I understand that it is not nice when you change the PSU, the system waits 2 seconds before it starts, but this cannot be solved by the board, or BIOS.
I have spoken to several manufacturers, but no one can really tell me why this is, but the fact that one PSU, works fine, and another gives this delay, makes this clearly a PSU issue. Manufacturers do not make the PSU's themselves, there are only a few manufacturers of PSU, all the others buy from these, and just ask them for specific options and specifications, and of course by their own design. also created topic on reddit: https://www.reddit.com/r/overclocking/comments/5i9xfh/new_psu_and_weird_selftest/ important message: I have the same motherboard and the same issue when unplugging the PC for a longer time period. My PSU is the EVGA 650GQ so that shouldn't be the problem. With all that knowledge I think that problem is MOBO related not PSU related. Can anyone help me ? Thank You for reading :)
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Xaltar
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Joined: 16 May 2015 Location: Europe Status: Offline Points: 25028 |
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Posted: 20 Dec 2016 at 7:58pm |
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What is happening is the system is running additional post tests after "power loss" is detected. This is a standard safety feature with most motherboards today (of all brands). Happening with one psu and not another could be caused by any number of reasons. The original PSU may hold a small charge for longer than the new one thus preventing the "power loss" flag or the older PSU discharges it's capacitors in a more agreeable way that the motherboard does not flag etc. I can reproduce the "issue" on 2 of my own systems by doing as you say, switch off at the wall. This happens on my Zalman 700w PSU as well as my Cooler Master 500w unit but does not occur with my OCZ 1000w unit. It varies from one PSU model to another I guess.
As for the overclocking, I don't see a board listed in your specs so I can't offer any tips/suggestions.
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Xaltar
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Posted: 20 Dec 2016 at 8:15pm |
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Just as an aside, it is not at all healthy for your system to continually power off and on at the wall. It creates a power surge every time you power off and on that will over time damage your PSU and possibly even other components.
It is also likely that the more expensive, higher tier PSU cuts power more abruptly to mitigate the power off surge which does not allow the board to enter a proper power off state before power is cut completely. Even higher end PSUs have additional capacitors and protections that again mitigate this effect but without causing the power loss flag. The system barely draws a few watts of power when in it's usual powered down state. It is recommend to not switch off at the wall unless you plan to be away for a while (like a month holiday for example).
Edited by Xaltar - 20 Dec 2016 at 8:16pm |
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Ky0sHiR0
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Posted: 20 Dec 2016 at 9:25pm |
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Ky0sHiR0
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Posted: 20 Dec 2016 at 9:35pm |
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I can return current PSU. I should decide before 25 December
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wardog
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Posted: 20 Dec 2016 at 9:45pm |
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That line above grabs my attention. Let's for a moment not consider it a Power Supply issue but instead one of simply proper power. What does your term "etc' consist of connected wise? IMO you have too much connected to the power strip now, w/o knowing what that "etc' includes. If that includes a laser printer, all bets are off the table. To test, pull the strip and all connected out of the wall. Now, with just the computer and essentials to operate it, plugged directly into the wall outlet(s) sans all that other hardware,, does the system behave the same or better? Now let's move on to discuss the damaging inrush current that you are unnecessarily subjecting all the items connected to the power strip. An excellent article I post here every time I read of people cutting power at the strip instead of leaving their newer highly efficient computers in a powered down state. http://sound.whsites.net/articles/inrush.htm Leaving capacitors charged in a powered down state is far far better on parts/components than justifying ANY energy saved by doing what you currently do, flip the strips switch and cut all power. Possible short term and definitely long term damage happens each and every time you flip the strips switch to On. |
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wardog
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Posted: 20 Dec 2016 at 9:52pm |
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And I should include that ALL computer power supplies are switching mode power supplies.
Important when digesting the article I linked of inrush current above. It directly apples to all desktop computers. |
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Xaltar
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Posted: 20 Dec 2016 at 10:00pm |
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Thanks for posting the article link Wardog, I remembered reading it last time you posted it but couldn't find it to share here. A very interesting read.
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Xaltar
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Posted: 20 Dec 2016 at 10:02pm |
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Basically just shut down the system and walk away, it's that simple  The only time my systems are ever cut from the wall is when there is a thunderstorm or when I am away for more than a day or 2.
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Ky0sHiR0
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Posted: 20 Dec 2016 at 10:28pm |
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I am coming home right now. Will check cables, and connection without power strip and post results :)
Thank You guys
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Ky0sHiR0 wrote: