disabling the C state in BIOS

[Usman Anwar]

is it ok if i turn off the C state in BIOS. i only want it because I think my PSU is not Haswell certified & is thus giving me random shutdowns in IDLE state.
what are the pros & cons, if i disable it ?

 

[Gingerbread]

The shutdowns you are getting are most likely not caused by the C state. What is your full setup if you don't mind?

 

[helpstar]

Which processor?
Which motherboard brand and model?
Which power supply is it? Brand and model are written on it.

Bios version of the motherboard?

 

[Usman Anwar]

The shutdowns you are getting are most likely not caused by the C state. What is your full setup if you don't mind?

intel core i5 4690k
Kingston 8 gb ram
MSI z97 gaming 5
Antec tp-750
keep in view that the PSU is a 2nd hand unit(maybe 2-3 years old). all other componets are new & a year old

Also, the random sgutdowns only occur when i browse the internet, watch movies & youtube.
they have NEVER occured in games like GTA V, The Division etc

 

[helpstar]

You need at least bios version 1.2 to fully support your haswell refresh cpu. But there are much more updated ones. The latest is version 1.D
https://us.msi.com/Motherboard/support/Z97-GAMING-5.html#down-bios
Update it in bios, not in Windows

Edit:
To disable Intel C-State, enter bios. Enter sub menu "CPU feature"-> set Intel C-State from auto to disable

 

[Usman Anwar]

You need at least bios version 1.2 to fully support your haswell refresh cpu. But there are much more updated ones. The latest is version 1.D
https://us.msi.com/Motherboard/support/Z97-GAMING-5.html#down-bios
Update it in bios, not in Windows

Edit:
To disable Intel C-State, enter bios. Enter sub menu "CPU feature"-> set Intel C-State from auto to disable

are u sure !?
'coz a lot of people are saying, its the PSU thats faulty

 

[helpstar]

It could be faulty too. But why not have a look at your bios first? Which bios is installed? Before 1.2, the CPU was not supported, that's fact. The c-state can be disabled in bios too, if the PC still shuts down in idle. After these steps, I would consider the psu faulty. At this moment, all possibilities could be true.

If you disable c-states, a non haswell ready psu would work without problems, that's pro

Contra is that the CPU will use more power in idle, but if you wouldn't need to buy a new psu, that's ok.

 

[Usman Anwar]

It could be faulty too. But why not have a look at your bios first? Which bios is installed? Before 1.2, the CPU was not supported, that's fact. The c-state can be disabled in bios too, if the PC still shuts down in idle. After these steps, I would consider the psu faulty. At this moment, all possibilities could be true.

If you disable c-states, a non haswell ready psu would work without problems, that's pro

Contra is that the CPU will use more power in idle, but if you wouldn't need to buy a new psu, that's ok.

that still doesn't solve the problem, i guess i'll have to wait to get enough money to get a gold rated PSU
one more thing, the PSU thats giving me shutdowns is a 2nd hand unit. i replaced it with a a spare Corsair 550w PSU. & it seems to be working fine in normal usage, only ths time, the Corsair PSU is not capable to handle my Strix GTX 970 in heavy games.
so i am convinced that the problem lies in the PSU.
what do u say ?

 

[Usman Anwar]

It could be faulty too. But why not have a look at your bios first? Which bios is installed? Before 1.2, the CPU was not supported, that's fact. The c-state can be disabled in bios too, if the PC still shuts down in idle. After these steps, I would consider the psu faulty. At this moment, all possibilities could be true.

If you disable c-states, a non haswell ready psu would work without problems, that's pro

Contra is that the CPU will use more power in idle, but if you wouldn't need to buy a new psu, that's ok.

i don't think the BIOS update is needed, i mean i have been using this PC for 2 years & the only issue i've encountered uptil now is that of the PSU; this is the 2nd time i'll have to replace the PSU

 

[helpstar]

Which bios version is on it now?

A 550w psu should handle a gtx970. What's the problem with this?
Bios update could solve this too.

Which corsair model is it?

 

[Usman Anwar]

Which bios version is on it now?

A 550w psu should handle a gtx970. What's the problem with this?
Bios update could solve this too.

Which corsair model is it?

Corsair vs550

i used this PSU for 6 months b4 buying the GTX 970. When i installed the gtx 970, it worked fine for2-3 months until it started to give me PC shutdowns in games like GTA V, the Division, Black Ops 3 etc
other than that, my PC works fine in normal usage such as internet browsing, movies, streaming, etc
the problem only occur in games wid this PSU

 

[helpstar]

Well, beside both PSUs are most likely the cause of your problems, updating the bios will improve the compatibility of your whole system. Which version is it now? It has to be at least version 1.2 to work properly.

 

[Usman Anwar]

Well, beside both PSUs are most likely the cause of your problems, updating the bios will improve the compatibility of your whole system. Which version is it now? It has to be at least version 1.2 to work properly.

i'll check it....

 

[Usman Anwar]

Well, beside both PSUs are most likely the cause of your problems, updating the bios will improve the compatibility of your whole system. Which version is it now? It has to be at least version 1.2 to work properly.

i've checked the BIOS version, u were asking.
its 1.8