PC randomly shuts off when playing games

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michael9594

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Feb 26, 2014
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I over clocked my CPU to 4.5 GHz i5 4670k haswell and whenever I start up FSX (Flight Simulator) and click play it will run for 10 seconds then restart. The LED fans stay on but it just restarts. When it is on 4.4 GHz it is fine!! Could anyone help me?
Thanks
 
Solution
InvalidError

When overclocking, 1C when at otherwise acceptable temperatures can still make the difference between stability and crash/reboot.

A simple test for that would be to unplug the CPU fan and see at what temperature your system crashes/reboots at when under load at 4.4GHz. If it is still going at 75C or higher, the problem is probably elsewhere since the chip appears to have a fair amount of thermal tolerance left.
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rhysiam

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Mar 24, 2013
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A crucial part of the overclocking process is thorough testing to make sure that your OC doesn't make the system unstable. Clearly the system is unstable at 4.5Ghz as it restarts.

Have your read some overclocking guides? They would tell you to test thoroughly before settling on your final OC. You can start raising voltages to achieve higher OCs, but that can reduce the life or damage your CPU, so don't do that unless you're really sure you know what you're doing. Google some OCing guides and follow them closely. That's a really popular chip so you shouldn't have any troubles finding some good guides for it.
 
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InvalidError

InvalidError

Titan
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May 18, 2007
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If the HSF is improperly mounted, 10 seconds sounds long enough for the CPU to heat up and hit thermal trip. If you have a secondary display, put some hardware monitoring software on it and look at what happens to CPU/GPU temperature during those 10 seconds.

Many things warm up over those 10 seconds... the CPU, CPU VRM on the motherboard, wiring, components inside the PSU, etc. The PSU is usually at the top of the suspect list but CPU/GPU temperatures are much easier to check first.

Of course, there is also the possibility that you are simply trying to push the CPU beyond its stable limit as rhysian said. Beefier cooling (if you do not already have a high-end cooling solution) might help you stabilize 4.5GHz in this case.
 
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michael9594

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Feb 26, 2014
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Cheers, I don't need to go to 4.5GHz, 4.4 is fine. Thanks
 
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michael9594

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Feb 26, 2014
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I don't think its temperature, on 4.4 GHz it doesn't go above 55-60c, Thanks

 
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InvalidError

InvalidError

Titan
Moderator
May 18, 2007
23,815
5,265
108,890

When overclocking, 1C when at otherwise acceptable temperatures can still make the difference between stability and crash/reboot.

A simple test for that would be to unplug the CPU fan and see at what temperature your system crashes/reboots at when under load at 4.4GHz. If it is still going at 75C or higher, the problem is probably elsewhere since the chip appears to have a fair amount of thermal tolerance left.
 
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