OC with Asus optimal on i5 2500k

[litleboy]

Just upgraded to Fractal D. Redefine R5 and MC hyper 212 evo.

I got a blue screen on the second day after OC. CPU was showing 40C at the time. is it posible that I can get an unstable system eve if the CPU temp is below 45C.

or could it be something else.

Thanks

Summary
Operating System
Windows 7 Professional 64-bit SP1
CPU
Intel Core i5 2500K @ 3.30GHz 38 °C
Sandy Bridge 32nm Technology
RAM
12.0GB Dual-Channel DDR3 @ 668MHz (9-9-9-24)
Motherboard
ASUSTeK COMPUTER INC. P8P67 LE (LGA1155) 30 °C
Graphics
HP 2211 (1920x1080@60Hz)
DELL SP2009W (1680x1050@60Hz)
1024MB ATI Radeon HD 5670 (XFX Pine Group) 42 °C
Storage
232GB Samsung SSD 850 EVO 250GB ATA Device (SSD) 33 °C
931GB Western Digital WDC WD10 EADS-00L5B1 SCSI Disk Device (SATA) 31 °C
Optical Drives
HL-DT-ST BD-RE WH14NS40 ATA Device
Audio
AMD High Definition Audio Device

 

[clutchc]

Sure. A bad OC will do that every time. What were your OC settings when it crashed?

 

[litleboy]

Sure. A bad OC will do that every time. What were your OC settings when it crashed?

Default setting by ASUS optimal mode, Will check tomorrow what are those default settings.

Thanks for answering. I was under the impression only heat was the cause of unstability.

 

[clutchc]

Sure. A bad OC will do that every time. What were your OC settings when it crashed?

Default setting by ASUS optimal mode, Will check tomorrow what are those default settings.

Thanks for answering. I was under the impression only heat was the cause of unstability.

You shouldn't use the auto AI mode. That always fails early. If you want to OC, set it to manual and then change one parameter at a time, starting with the CPU Ratio found in the CPU Configuration section. But first disable turbo mode.

 

[litleboy]

ok, so I followed two videos that are using the same MoBO and CPU
https://www.youtube.com/watch?v=UlRw-1V6-Yk
https://www.youtube.com/watch?v=WMZoWOpry40

Im noticing the intel CPU stepping is not working the same way... before the OC, the multiplier was constantly changing from 16x to 33x after the OC its always 45x until the heat gets to 85C then it goes to 33x.

 

[clutchc]

ok, so I followed two videos that are using the same MoBO and CPU
https://www.youtube.com/watch?v=UlRw-1V6-Yk
https://www.youtube.com/watch?v=WMZoWOpry40

Im noticing the intel CPU stepping is not working the same way... before the OC, the multiplier was constantly changing from 16x to 33x after the OC its always 45x until the heat gets to 85C then it goes to 33x.

That's because it it too hot! 85C! It is throttling to save itself.

 

[litleboy]

Thanks clutchc, I understand that. Now i'm testing with x37. but still intel stepping is not working as with the default MoBo settings few second after computer is on I see x16 when computers is IDLE, now it's all the time x37 (except when it gets hot). I don't understand why step is not working when computer is IDLE.

 

[clutchc]

Thanks clutchc, I understand that. Now i'm testing with x37. but still intel stepping is not working as with the default MoBo settings few second after computer is on I see x16 when computers is IDLE, now it's all the time x37 (except when it gets hot). I don't understand why step is not working when computer is IDLE.

Could it be that you have enough stuff running in the background that one or more cores is almost always busy? Watch the CPU activity in Task Manager.

 

[litleboy]

no, CPU usage is 15% to 30%, all cores, stepping is not working.

 

[clutchc]

no, CPU usage is 15% to 30%, all cores, stepping is not working.

If all cores are active at 15% to 30%, then Speed Step will be off. Speed Step is only active when a core is inactive for several seconds. Or did I misunderstand your comment?

 

[litleboy]

no, CPU usage is 15% to 30%, all cores, stepping is not working.

If all cores are active at 15% to 30%, then Speed Step will be off. Speed Step is only active when a core is inactive for several seconds. Or did I misunderstand your comment?

it's just that with default settings I do see CPU stepping. multipliers goes as los as x16 when PC is 15% to 30% CPU usage.