i5 4690k and MSI z97 gaming 7 BOOT Problem

Not having a CPU installed proves absolutely nothing; the motherboard absolutely needs the CPU to work. Did you try another PSU? If it isn't the PSU, then RMA the motherboard.

I unselected the best answer since your issue is not resolved; you should pick a solution only once the issue has been resolved. A lot of components can fail on a motherboard; a CPU rarely fails. You could easily have the CPU tested at a shop; either the PSU or the motherboard most likely is defective. Any old ATX PSU that has a 20 or 24 pin connector and a 4 pin CPU connector can be used to ensure your PSU isn't the issue.

Your analysis is flawed: the motherboard is NOT working at all without the CPU. RMA the CPU first as it's easier, but don't have high hopes that it will resolve your issue.

Agreed, the motherboard may light up but won't even attempt to post (start anything) without a cpu installed. It's like a car, take out the engine and turn the key all day but without anything to start up it won't matter. In order to post at all the motherboard needs the cpu and at least some ram installed along with a video signal.

I'm not sure if this is your problem but Haswell chips has a sleep state that requires less power than when the CPU is active.,These low power states could trip a Power surge protector in some PSU's that ARE NOT fully compatibility power supplies making the unit shut off automatically to protect Mobo/CPU.


http://www.corsair.com/en-us/blog/2013/may/haswell-compatibility-with-corsair-power-supplies

your : VS650 is Likely compatible — currently validating(webpage hasn't been updated over 9 months)which means its most likely not 100% compatible and safe for the low power states.


Again I'm not sure if this the problem,IMO you should have Tried a new PSU before RMA'ing any part.,Rule of Troubleshooting....Try the cheapest or easiest method first, RMAing may not cost you anything but in most cases the PSU can be done in less then an hour time=money.


I hope you solve your problem soon ,When i built my computer i made sure i had Haswell compatibility power supply to avoid this very issue with haswell's sleep state.

I'm sorry for making another post but i was reading coming from the webpage i posted.



''''''''''Pedro said:

VS550 is not ready. Bought a i7-4790. Result: constant reboots. '''''''''

again i'm not an expert but i'm just trying to help you out,I REALLY think its your PSU.

The constant reboots for the guy with the 4790 are either using sleep states c6/c7 which should be disabled in bios if they're not using a 'haswell ready' power supply or from something else. If the pc goes to sleep with psu that isn't 'haswell ready' with the extended c6/c7 sleep states enabled, it won't 'wake' back up. It will function fine, enter sleep mode and then require a hard boot to restart the machine. If the pc isn't going into sleep mode and just perpetually rebooting at random times they have another issue that could be any number of things.

As quickly as the op's pc is shutting down or failing to boot properly it's not even getting a chance to enter sleep mode. If a person uses an old 'non haswell' psu with haswell and never uses the sleep settings it'll run just fine. The only difference is haswell has a deeper sleep state than previous cpu's and when mixed with a 'non compliant' psu, that psu lacks the capability of recovering from such low power and basically shuts off.

If the system worked for 4 months with the VS650 PSU, then it should still be able to power it up. I'm using very old PSUs for testing purposes and they power up Haswell based systems without issues. I wouldn't expect c6/c7 sleep states to work, but I would expect a VS650 to be better than an old P4 PSU.

I went to the products features
http://www.corsair.com/en-us/vs-seriestm-vs650-650-watt-power-supply

>>>>>>>Over-voltage, under-voltage, over-current, and short circuit protection provide maximum safety for your critical system components<<<<<<<


Some PSU's have features that shut the PSU off to protect the computer parts from either over-CURRENT or under-VOLTAGES..,the OP's PSU has this feature and is not haswell ready so it explains the rebooting.


I would order a new haswell ready PSU from amazon and test it then send it back for a FULL refund....if money is an issue for you


Good Luck

Checking if it's the PSU is easy. Use any old 300W or better ATX PSU and the system should power up. No GPU is required; you can connect the monitor to the motherboard.

Obviously not; the Intel graphics is on the CPU. A CPU and memory always are required.

Over current and under voltage protection have nothing to do with haswell cpu's. My psu has both of those features, is an older psu, non haswell ready and powers my 4690k just fine. Matter of fact my other 4690k system runs just fine on a non haswell ready psu as well. Haswell's "compatibility" issues stem from nothing more than sleep states and extended low power options previously not used. That's it, nothing more. Disable c6/c7 in bios, problem solved.

If it's the psu at fault, it's nothing to do with being haswell ready. If anything, most likely because it's a lower end corsair psu which have a history of problems from cheap capacitors to poorly molded mainboard power plugs that cause people grief getting them fully seated.

Just because it worked for 4mo doesn't mean a tier 3 psu didn't decide to crap out for no reason. Honestly I know a lot of people use corsair psu's because they're cheap, constantly on sale - I really can't think of one except 'maybe' the axi I'd use in my own systems much less wish on anyone else. People say corsair gets a bad reputation, well - who's fault is that, and why - theirs.

There can be no display without the 4690k installed. For one thing, if you're trying to boot the system it HAS to have a cpu installed. Period. Or it will not post. If you're testing the system with minimal power draw and/or don't have a graphics card, you'll be using the graphics port on the motherboard to get display to the monitor (or you can't see it post even if it does). The integrated gpu is built into the 4690k cpu chip so again, the cpu HAS to be installed.

One of two things - bad motherboard or bad power supply are most likely at fault. Too hard to guess from a distance but for all we know the low quality psu went out and took the motherboard with it. If at all possible, try and find a psu from tier 2 on this list. Just be sure to carefully check part numbers since some look very similar while being very different products. Tier 1 are great, probably overkill. Personally I try to avoid and rarely bother recommending anything from tier 3 and below.

http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html

I'd start with the psu, either swap for another or get a better quality unit or rma the one you have. If that brings no joy and still having the problem I'd look at the motherboard, rma'ing that next. The cpu was already replaced and was the least likely of the 3 to have problems but at least it's been replaced. For that matter it could be a bad power switch on the case. If the switch is faulty and went out, not maintaining connection of power current in the 'on' state then it's essentially a 'reset' switch with momentary power. Just something else worth looking at.

Yes lets dismiss People reporting there computers in a constant reboot loop because they didn't have a haswell compatible,I've read many reviews on power supplies sometimes out right dying from going into The sleep states.if your not worried about the ''c6/c7' sleep states WHY DISABLE IT?if its only a small crash if it goes into the sleep state then WHY DISABLE?

Yea lets call everyone who had PSU issues lairs and blame the the company for making Cheap PSU's.Facepalm\


Damn if i knew there was no problem at all and ignored the Reviews that claimed PSU's died after going into sleep state i could have saved myself 30$.......NOT,I'm glad I paid the extra money and saved me a headache.

however i shouldn't have even explained why the PSU might have went bad because clearly you have to tell me I'm wrong and that its Corsair's fault....At least we agree that it MIGHT be the PSU....... Faiz Aslam seems to be in his own world and not taking anyone's suggestion I guess he's a trolling.

Haswell compatible or non 'haswell ready' has nothing to do with reboots. The ill effect of using a 'non compliant' psu with haswell AND the newer extended c6/c7 sleep states is the psu's inability to 'wake' - it shuts off requiring a cold boot. That's it.

"The result has been power supply manufacturers scrambling to see if their power supplies can handle Haswell's requested 0.05A on the 12V rail as opposed to the ATX 2.3 minimum's 0.5A." "Both Corsair and Sea Sonic have been rigorously testing their power supplies to determine which ones definitely can handle Haswell's C6/C7 states"
http://www.anandtech.com/show/6953/sea-sonic-and-corsair-power-supplies-certified-for-haswell

http://coolermaster-usa.com/press_release/haswell/haswell.html
Nice list of psu requirement myths debunked.

This is from corsair directly.
"According to Intel's presentation at IDF, the new Haswell processors enter a sleep state called C7 that can drop processor power usage as low as 0.05A. Even if the sleeping CPU is the only load on the +12V rail, most power supplies can handle a load this low. The potential problem comes up when there is still a substantial load on the power supply's non-primary rails (the +3.3V and +5V). If the load on these non-primary rails are above a certain threshold (which varies by PSU), the +12V can go out of spec (voltages greater than +12.6V). If the +12V is out of spec when the motherboard COMES OUT OF THE SLEEP STATE, the PSU's protection may prevent the PSU from running and will cause the power supply to "latch off". This will require the user to cycle the power on their power supply using the power switch on the back of the unit."
http://www.corsair.com/en-us/blog/2013/may/haswell-compatibility-with-corsair-power-supplies

If users are complaining of cycling boot looping being related to using a non haswell compliant psu, they're mistaken. They have a different problem at hand and are blaming it on their psu not being 'haswell ready' which just means they're misinformed or don't understand the situation. I can claim my ferrari is junk because it won't go from 2nd to 3rd gear without using the clutch. Is there a problem with the car just because I said so as an end user? Or do I just need to learn how to drive?

The psu's don't die from going into sleep state - or shouldn't unless you're using a garbage psu and that's a totally different problem unto itself. Obviously your haswell ready psu works fine and I'm happy for you. A little investigation and research is all it takes to learn what the so called 'issues' are and how simple it is to avoid them. There's no need for people to shell out more money for a gimmicky label. Both my systems running 4690k's are using psu's built prior to haswell. One a seasonic 650w the other an ocz modxtreme 550w. Both have c6/c7 disabled in bios, took less than 3min to make sure the settings were disabled and like magic - both run 24/7 fantastically.

Not saying people shouldn't buy a psu because it's haswell ready, just isn't accurate to try and convince them it's the problem and it's a requirement. Especially in this particular users case. Their pc is constantly looping, ie stuck in a reboot sequence of power on/power off. It's not having trouble coming out of a sleep state requiring the psu to be restarted.

I tried googling for people reporting issues of boot looping problems specifically related to non haswell psu's and couldn't find any using varied search queries. All I could find were people who 'thought' that might be the problem suggested in their comments. A quick search on what haswell ready psu's are easily gives the relevant info I posted above outlining the only conflict using a 'compatible' vs 'non compatible' psu with haswell.

You say if not worried about c6/c7 why disable? Because that IS the known problem. Why would you not disable a useless feature for the majority of users that would cause a pc to knowingly crash? First off, it's ONLY pertinent to sleep modes. Not idling, sleep modes. Sleep states are low power conditions the pc 'can' enter (if the user has their pc setup in such a way) after a period of inactivity to save power. Under power settings in windows, users can enable/disable sleep states, hibernate etc. There are several levels of 'sleep' a pc can enter correlating to various levels of power savings. Most of these features are meaningless to desktop users and more designed for laptop users where battery life is a major concern - not when plugged into a power outlet like a pc is.

If you're willing to fall for marketing hype without educating yourself, that's up to you. You're obviously making arguments for things which you don't understand. As for blaming corsair for making crap power supplies, it's not 'blame', it's true. Aside from the axi line and maybe one other line, tell me how many corsair psu's rate tier 1 or tier 2 on anyone's psu list? The cx, vs, 'builder series' and so on are mediocre at best. Why is it companies like corsair and raidmax get bad reputations for low quality psu's and seasonic and evga don't? People just have a beef with corsair for no reason? They chose to go with bottom of the barrel parts on many of their units and fairly earned their reputation. No one forced them to.

Anyone is welcome to use whatever parts they want. If you want to build a machine using a biostar motherboard, a low tier corsair or raidmax psu or some other no name psu and so on, more power to you. You won't find any corsair psu's in my builds. To be honest, if I saw a person in a store with a corsair psu in one hand and an evga, antec, seasonic or something in the other - I'd give them $20 out of my own wallet just to save them the headache so they weren't stuck with the corsair.

quotemsg=15871270,0,1975790]Hold on till RMA of Motherboard :-D[/quotemsg]As I suggested in my first reply, did you try another PSU? You should RMA the motherboard only if another PSU doesn't resolve the issue. It will take time to resolve the issue because you started with the CPU that was the most unlikely component to be defective.

Glad you got it sorted out (hopefully for good now).