BSOD when OC QX6850

[imported_spike99]

Need some help in OC'ing. I have changed multiplier from 9 to 11 and change vcore to get stability.

Below is my result when OC'ing with vcore at 1.425

QX6850 @ 3.66 vcore 1.425 Room Temp 26C
High fan cpu 17 idle, 46 load. Increase of 29C
High fan core#1 25 idle, 59 load. Increase of 34C

Medium fan cpu 25 idle, 54 load. Increase of 29C
Medium fan core#1 35 idle, 67 load. Increase of 32C

I had a similar PC with but it ran stable with vcore of ~ 1.3543 and I remember that my PC was able to boot with a minimum vcore of 1.29

With this PC my PC barely boots up with vcore of 1.35. I'm currently using Everest Ulitimate for stress testing and temp monitoring and I also use Prime95 for stress testing.

I start with a low vcore and start to increase until my PC boots up. After I'm able to boot PC (vcore a little above 1.35) I continue to incrementally increase vcore but with vcore at 1.4, I get BSOD less than 5mins... There are some instances where I also get BSOD with vcore at 1.425 too.

Using Prime 95 & Everest Ultimate, I never see any error messages from these programs, I just get BSOD. When stress testing at stock speed with vcore set at AUTO, I don't get any BSOD or errors.

Does that mean I need to continue to increase vcore ? Not seeing any error messages from Prime95 or Everest Ultimate and just getting BSOD.... Could that possibly indicate a problem with my hardware ?

Thank you in advance for any suggestions.

 

[The-Noid]

Not enough vcore.

Some chips clock far better than others.

 

[imported_spike99]

Not enough vcore.

That's what I thought... I'll continue to increase vore until I don't get any BSOD.

One last question... According to Intel I believe their limit of vcore is 1.5. If I continue to get BSOD vcore below 1.5, should I continue increasing vcore past 1.5 ?

One thing to note... During normal usage and long days of playing games... I never get BSOD's... Only when stress testing... Which I don't consider real world usage.

 

[AMDZen]

This could be any number of things and not just the vcore of the CPU, in fact I sincerely doubt its that.

Probably related to your FSB or memory timings, could also be your motherboard settings. You're not providing enough information to know for sure what it is but I would guess that you should try loosening your timings just a touch or increase the voltage on the memory

 

[imported_spike99]

This could be any number of things and not just the vcore of the CPU, in fact I sincerely doubt its that.
Probably related to your FSB or memory timings, could also be your motherboard settings. You're not providing enough information to know for sure what it is but I would guess that you should try loosening your timings just a touch or increase the voltage on the memory

I have not modified any settings other than multiplier and vcore.

I really consider myself a noob when it comes to overclocking but I believe FSB is set at 333. If I'm not mistaken, I believe my memory timing is 5-5-5-15 but I need to double check.

When I get home (at work now), I will see what the voltage is set for memory and get back.

 

[AMDZen]

Originally posted by: spike99

This could be any number of things and not just the vcore of the CPU, in fact I sincerely doubt its that.
Probably related to your FSB or memory timings, could also be your motherboard settings. You're not providing enough information to know for sure what it is but I would guess that you should try loosening your timings just a touch or increase the voltage on the memory

I have not modified any settings other than multiplier and vcore.

I really consider myself a noob when it comes to overclocking but I believe FSB is set at 333. If I'm not mistaken, I believe my memory timing is 5-5-5-15 but I need to double check.

When I get home (at work now), I will see what the voltage is set for memory and get back.

OK well there you go, you might need to bump up one of the motherboard voltages as well as the memory voltage.

 

[imported_spike99]

OK well there you go, you might need to bump up one of the motherboard voltages as well as the memory voltage.

I don't know what the motherboard voltages are.... Are you referring to timings 5-5-5-15 ?

When I get home this afternoon, I will check settings for memory voltage.

 

[AMDZen]

It says different things depending on your MB, I don't know ASUS but it should be something like

MCH Voltage

ANd it might just say

MCH OverVoltage Control

And I would put it at something like +0.1V above default

 

[imported_spike99]

OK, not sure what MCH stands for... but checking my MOBO these are the options I have available.

I can change the below voltages:
vcore = Currenty set it at 1.425
Memory voltage = 2.00v
1.2 HT voltage = 1.2v
North Bridge voltage = AUTO
South Bridge voltage = AUTO
CPU VTT voltage = AUTO

Also, checking some other settings...
FSB MHz = 1333
Memory MHz = 667

I did call my vendor CyberPowerPC, and according to them... When they OC their PC's they set vcore at 1.525v and told me that at minimum it should be at 1.5v

Let me know if I should be changing other voltages other than vcore or should I just keep increasing vcore until possibly reaching 1.525 as recommended by CyberPower ?

 

[AMDZen]

Originally posted by: spike99
I did call my vendor CyberPowerPC, and according to them... When they OC their PC's they set vcore at 1.525v and told me that at minimum it should be at 1.5v

Let me know if I should be changing other voltages other than vcore or should I just keep increasing vcore until possibly reaching 1.525 as recommended by CyberPower ?

Oh hell no, don't listen to CyberPower. I think you're running a bit high for the speed your running even at 1.425, but it depends because every motherboard is different. Get CPU-z and see what tthe CPU voltage really is, every board I've ever had was inaccurate - either it undervolts by a small bit or undervolts. For instance my Opty 170 is at 1.375 in BIOS but actually runs at 1.344-1.360

As far as your other voltages, I would read around on what the ASUS guys with your board are using. I'm sure Asus has a forum of their own. I'd try to take the SB and NB up a smidge though to start

 

[imported_spike99]

Get CPU-z and see what tthe CPU voltage really is, every board I've ever had was inaccurate - either it undervolts by a small bit or undervolts. For instance my Opty 170 is at 1.375 in BIOS but actually runs at 1.344-1.360

According to CPU-Z, my Core Volatage moves between 1.296 & 1.312V but mainly stays at 1.312V
I also have Everest Ultimate, and this displays Core Voltage as 1.35V, but its odd because when I open the system stability test window, you can see various voltages and the CPU Voltage is at a constant 1.39V

Since both softwares... CPU-Z & Everest Ultimate display different voltages... not sure by which one to go by...

So does that mean that my MOBO undervolts ? Does this mean that this voltage is okay ?