Overclocking No BSOD But PC Reboots, Getting Stable?

[Shadowman]

I have overclocked many cpu's in the past and obviously when not stable while stress testing got the  BSOD (Blue Screen of Death) all the time and then PC reboots. However a past few days I have been stress testing my i9 7900x cpu with a 4.6GHz overclock I started with very low voltage and got the BSOD couple of times however I have reached a certain voltage where I don't get the BSOD at all but the PC just reboots itself few minutes after stress test has started? Could this mean it's getting near stable, reason why I say this is after this rebooting I added a bit more voltage and did a stress test for about 2 hours without the PC rebooting seems stable. 

[suchamoneypit]

Mine only did that when my CPU went in extreme thermal thottling (so way too hot).

 

What are your temps while doing these stress tests? I think too much voltage, be careful.

[suchamoneypit]

Could also be a chip that is just unstable at higher voltages, just bad odds on the silicon lottery?

[xg32]

19 minutes ago, Shadowman said:

I have overclocked many cpu's in the past and obviously when not stable while stress testing got the  BSOD (Blue Screen of Death) all the time and then PC reboots. However a past few days I have been stress testing my i9 7900x cpu with a 4.6GHz overclock I started with very low voltage and got the BSOD couple of times however I have reached a certain voltage where I don't get the BSOD at all but the PC just reboots itself few minutes after stress test has started? Could this mean it's getting near stable, reason why I say this is after this rebooting I added a bit more voltage and did a stress test for about 2 hours without the PC rebooting seems stable. 

whats ur full setup, the skylake x cpus are the hottest ever seen, if your chip is not delidded and ur going for 4.6, u are likely frying ur chip, overheating but stable=restart without bsod.

[SpaceGhostC2C]

I would say you are approaching the right voltage when there's no BSOD nor freeze, but the stress tests stops with an error message at some point.

The PC rebooting itself either means you are still not quite there or, as @suchamoneypit said, temperatures are rising too much / too quickly, regardless of whether the voltage is enough or not.

[Shadowman]

7 minutes ago, suchamoneypit said:

Mine only did that when my CPU went in extreme thermal thottling (so way too hot).

 

What are your temps while doing these stress tests? I think too much voltage, be careful.

Like I mentioned I actually started of with low voltage, with room temp at 24c 4.6GHz at 1.13v highest temp I hot was 69c after 2 hours of Aida64 test with CPU,FPU and Cache all checked PC did not reboot.

 

3 minutes ago, xg32 said:

whats ur full setup, the skylake x cpus are the hottest ever seen, if your chip is not delidded and ur going for 4.6, u are like be frying ur chip, overheating but stable=restart without bsod.

Motherboard is Asus Rampage VI Apex, Custom watercooled by a 360 and 420 radiator . Bought the cpu delidded from a online store. 

[xg32]

Just now, Shadowman said:

Like I mentioned I actually started of with low voltage, with room temp at 24c 4.6GHz at 1.13v highest temp I hot was 69c after 2 hours of Aida64 test with CPU,FPU and Cache all checked PC did not reboot.

 

Motherboard is Asus Rampage VI Apex, Custom watercooled by a 360 and 420 radiator . Bought the cpu delidded from a online store. 

what about the vrm temps? only other thing i can think of if the cpu isn't overheating.

 

[Shadowman]

Just now, xg32 said:

what about the vrm temps? only other thing i can think of if the cpu isn't overheating.

 

 

CPU Full load the vrm reaches around 52c

[Shadowman]

Seems like low voltage  of 1.13v for a 4.6Ghz but don't know if the temps are ok it is a delidded cpu with a 360 & 420 radiator cooling it GPU is on air. Hitting 69c on full load with room temp at 24c like mentioned above. 

[done12many2]

31 minutes ago, Shadowman said:

I have overclocked many cpu's in the past and obviously when not stable while stress testing got the  BSOD (Blue Screen of Death) all the time and then PC reboots. However a past few days I have been stress testing my i9 7900x cpu with a 4.6GHz overclock I started with very low voltage and got the BSOD couple of times however I have reached a certain voltage where I don't get the BSOD at all but the PC just reboots itself few minutes after stress test has started? Could this mean it's getting near stable, reason why I say this is after this rebooting I added a bit more voltage and did a stress test for about 2 hours without the PC rebooting seems stable. 

 

You're more than likely hitting the default power limits of the motherboard.  Simply increase them and the reboots should stop happening.  Bare in mind that it also means that the limits were preventing your CPU from hitting max performance at the given clock/voltage so expect temps to rise a little at the same clocks/voltage.  This is due to the fact that your CPU is actually hitting full load now.  

 

If you need any further help with this or help with anything else x299 related, just ask.  I have a 7900x / x299 Rampage Apex myself.  

[Shadowman]

11 minutes ago, done12many2 said:

 

You're more than likely hitting the default power limits of the motherboard.  Simply increase them and the reboots should stop happening.  Bare in mind that it also means that the limits were preventing your CPU from hitting max performance at the given clock/voltage so expect temps to rise a little at the same clocks/voltage.  This is due to the fact that your CPU is actually hitting full load now.  

 

If you need any further help with this or help with anything else x299 related, just ask.  I have a 7900x / x299 Rampage Apex myself.  

Thanks, really appreciate it. Wow see you have 5 x EK 360mm rads just out of interest what temps are you getting with your i9 7900x at full load and is it delidded? Also if you don't mind what settings do you have on your motherboard am still a novice when it comes to overclocking the only things I changed are:

CPU ratio 4.6GHz,

CPU Override Voltage 1.13v,

CPU Input Voltage 1.90v

CPU Current Capability which is at 240%

CPU Load-Line Calibration at level 4

 

that's about it 

[done12many2]

19 minutes ago, Shadowman said:

Thanks, really appreciate it. Wow see you have 5 x EK 360mm rads just out of interest what temps are you getting with your i9 7900x at full load and is it delidded? Also if you don't mind what settings do you have on your motherboard am still a novice when it comes to overclocking the only things I changed are:

CPU ratio 4.6GHz,

CPU Override Voltage 1.13,

CPU Input Voltage 1.90

 CPU Current Capability which is at 240%

CPU Load-Line Calibration at level 4

 

that's about it 

 

You're welcome man.  

 

As for mine, temps are great for a 10 core running at 4.9 GHz with 4 cores boosting to 5 GHz.  My chip is delidded and like you've said, I have a pretty big loop.  I'll attached a RealBench stress test run for temps.

 

I can send you the BIOS text file.  It covers every single setting in my BIOS, but is a lot to chew on if you haven't been through one before.  

 

Couple of things.  VCCIN otherwise known as CPU Input voltage on Asus boards runs higher on the Apex than what is reported.  Get yourself a DMM and measure voltage at the ProBelt on the board.  ~1.81v to 1.85v should be more than you'll ever need.

 

Current capability looks perfect.  I also increase temp limit to 136 to get that out of the way as well.

 

I run LLC on AUTO (see previous comment about VCCIN/CPU Input Voltage).

 

Mesh OC and memory are a pretty huge area for improvement with x299.  I run mesh at 3.1 GHz and memory at 4000 MHz c16-18-16-36 1T with pretty tight secondaries. Mesh and memory are perfectly stable at these speeds and confirmed with HCI memtest to 1500% +.

 

Keep pushing it man.  It's a great platform.  

 

 

 

 

[Shadowman]

14 minutes ago, done12many2 said:

 

You're welcome man.  

 

As for mine, temps are great for a 10 core running at 4.9 GHz with 4 cores boosting to 5 GHz.  My chip is delidded and like you've said, I have a pretty big loop.  I'll attached a RealBench stress test run for temps.

 

I can send you the BIOS text file.  It covers every single setting in my BIOS, but is a lot to chew on if you haven't been through one before.  

 

Couple of things.  VCCIN otherwise known as CPU Input voltage on Asus boards runs higher on the Apex than what is reported.  Get yourself a DMM and measure voltage at the ProBelt on the board.  ~1.81v to 1.85v should be more than you'll ever need.

 

Current capability looks perfect.  I also increase temp limit to 136 to get that out of the way as well.

 

I run LLC on AUTO (see previous comment about VCCIN/CPU Input Voltage).

 

Mesh OC and memory are a pretty huge area for improvement with x299.  I run mesh at 3.1 GHz and memory at 4000 MHz c16-18-16-36 1T with pretty tight secondaries. Mesh and memory are perfectly stable at these speeds and confirmed with HCI memtest to 1000% +.

 

Keep pushing it man.  It's a great platform.  

 

 

 

 

 

Really appreciate this man, taking the time out to do this. I will send you private message with my email to send the BIOS text file thanks. 

[xg32]

3 hours ago, done12many2 said:

 

.

thats really one of the more impressive OCs i've seen this gen, 10 cores at 5ghz, what a work of art.