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3750k Overclocking Troubles

post #1 of 4
Thread Starter 
Hi Guys,

First off here is a link to My PC

I have been following Swag's guide to overclocking and am getting close to stable at 4600 MHz.
I have been testing using a fixed VCORE but I will switch to OffSet mode once I get a stable stress test.

Prior to overclocking I ran a bunch of stress tests to ensure that I had no faulty components.

@100 MHz BCLK with 46 multiplier

My VCORE is at 1.295V
My DRAM is at 1.58125V

I am stress testing with P95, running blend test using 80 - 90% of my RAM. My Temps float around 70°C to 75°C. The highest RealTemp has ever shown me for CPU temps is 85°C, TJMax set to 105°C.

I can run tests for a few hours at a time, but eventually what happens is my computer just completely shuts down and restart. Numerous times I have tried to run a stress test overnight only to come in the morning and see my PC has restarted, and no programs are open.

Leaving my settings set as above I ran a memtest for 9 hours, with no errors.

At this point I am guessing that either my CPU is shutting off an Temperature (Even though Real Temp tells me I am far from TJMax) or my Power supply is faulty?

According to the screen on my UPS, my PC is pulling ~300Watts when stress testing (including the monitor) so I have a hard time believing that my 750 Watt Power Supply is the problem.

I have not de-lidded my CPU or anything, only installed the Hyper-212 air cooler on my PU.

Is it possible that my VCORE is just not set high enough? Any other suggestions on what I should test next to troubleshoot? Anyone had a similar situation while testing?

Thanks...
-Apex
post #2 of 4
Quote:
Originally Posted by Apex22 View Post

Hi Guys,

First off here is a link to My PC

I have been following Swag's guide to overclocking and am getting close to stable at 4600 MHz.
I have been testing using a fixed VCORE but I will switch to OffSet mode once I get a stable stress test.

Prior to overclocking I ran a bunch of stress tests to ensure that I had no faulty components.

@100 MHz BCLK with 46 multiplier

My VCORE is at 1.295V
My DRAM is at 1.58125V

I am stress testing with P95, running blend test using 80 - 90% of my RAM. My Temps float around 70°C to 75°C. The highest RealTemp has ever shown me for CPU temps is 85°C, TJMax set to 105°C.

I can run tests for a few hours at a time, but eventually what happens is my computer just completely shuts down and restart. Numerous times I have tried to run a stress test overnight only to come in the morning and see my PC has restarted, and no programs are open.

Leaving my settings set as above I ran a memtest for 9 hours, with no errors.

At this point I am guessing that either my CPU is shutting off an Temperature (Even though Real Temp tells me I am far from TJMax) or my Power supply is faulty?

According to the screen on my UPS, my PC is pulling ~300Watts when stress testing (including the monitor) so I have a hard time believing that my 750 Watt Power Supply is the problem.

I have not de-lidded my CPU or anything, only installed the Hyper-212 air cooler on my PU.

Is it possible that my VCORE is just not set high enough? Any other suggestions on what I should test next to troubleshoot? Anyone had a similar situation while testing?

Thanks...
-Apex

Believe you will find the VCORE needs to be upped, to verify this, run the Linx Test OR run Prime 95 Small FFTs. Blend really stresses IMC more than individual core integrity.

It can be a PSU still so you aren't out of the woods yet.
Snowdevil
(16 items)
 
ASUS G750JM
(9 items)
 
 
CPUMotherboardGraphicsGraphics
[i7 4790K @ 4.4 GHz (1.186v)] [Asus Sabertooth Z97 Mark S] [nVidia Geforce GTX 1080] [nVidia Geforce GTX 1080] 
RAMHard DriveCoolingOS
[G.Skill 32GB DDR3 2133 MHz] [Crucial MX100 256GB] [Phanteks PH-TC12DX] [Win 10.1 Pro] 
MonitorMonitorKeyboardPower
[LG 29UM65 (2560x1080)] [QNIX Evo II LED (2560x1440)] [WASD v2 Tenkeyless] [NZXT Hale90 v2 ] 
CaseMouseMouse PadAudio
[ThermalTake GT10 Snow Edition] [Razer Mamba - Chroma] [Razer Kabuto] [Razer Man O' War] 
CPUMotherboardGraphicsRAM
i7 4770HQ Intel HM87 Express Chipset Geforce GTX 860M 8GB DDR3L 1600 MHz 
Hard DriveOptical DriveCoolingOS
Samsung SSD EVO DVD-RW Stock Windows 8.1 
Monitor
1920x1080 TN 
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Snowdevil
(16 items)
 
ASUS G750JM
(9 items)
 
 
CPUMotherboardGraphicsGraphics
[i7 4790K @ 4.4 GHz (1.186v)] [Asus Sabertooth Z97 Mark S] [nVidia Geforce GTX 1080] [nVidia Geforce GTX 1080] 
RAMHard DriveCoolingOS
[G.Skill 32GB DDR3 2133 MHz] [Crucial MX100 256GB] [Phanteks PH-TC12DX] [Win 10.1 Pro] 
MonitorMonitorKeyboardPower
[LG 29UM65 (2560x1080)] [QNIX Evo II LED (2560x1440)] [WASD v2 Tenkeyless] [NZXT Hale90 v2 ] 
CaseMouseMouse PadAudio
[ThermalTake GT10 Snow Edition] [Razer Mamba - Chroma] [Razer Kabuto] [Razer Man O' War] 
CPUMotherboardGraphicsRAM
i7 4770HQ Intel HM87 Express Chipset Geforce GTX 860M 8GB DDR3L 1600 MHz 
Hard DriveOptical DriveCoolingOS
Samsung SSD EVO DVD-RW Stock Windows 8.1 
Monitor
1920x1080 TN 
  hide details  
Reply
post #3 of 4
Thread Starter 
I think you are right on both ends.... I ran some more tests - I did need to up my VCORE. Also I have a feeling part of my issues is to do with my PSU. Seems like under heavy load, especially when my video card is working away too, my VCORE sometimes will spike down, and will set lower than I have set it in BIOS. I have my LLC set to Ultra High, under load the CPU voltage shows about 0.01V less than what I have it set to in BIOS. I tried LLC at extreme, but this was too much, causing my VCORE to be higher than I wanted.

Sometimes my VCORE will drop down 0.020V less than set point for a few seconds than come back up. Is this normal? Anyone else experience this?
post #4 of 4
Quote:
Originally Posted by Apex22 View Post

I think you are right on both ends.... I ran some more tests - I did need to up my VCORE. Also I have a feeling part of my issues is to do with my PSU. Seems like under heavy load, especially when my video card is working away too, my VCORE sometimes will spike down, and will set lower than I have set it in BIOS. I have my LLC set to Ultra High, under load the CPU voltage shows about 0.01V less than what I have it set to in BIOS. I tried LLC at extreme, but this was too much, causing my VCORE to be higher than I wanted.

Sometimes my VCORE will drop down 0.020V less than set point for a few seconds than come back up. Is this normal? Anyone else experience this?
Perfectly normal behavior under load. It's called Vdroop and LLC compensates for it. In addition, some people disable the power saving modes when overclocking to prevent any instability from lowered voltage appearing.
Snowdevil
(16 items)
 
ASUS G750JM
(9 items)
 
 
CPUMotherboardGraphicsGraphics
[i7 4790K @ 4.4 GHz (1.186v)] [Asus Sabertooth Z97 Mark S] [nVidia Geforce GTX 1080] [nVidia Geforce GTX 1080] 
RAMHard DriveCoolingOS
[G.Skill 32GB DDR3 2133 MHz] [Crucial MX100 256GB] [Phanteks PH-TC12DX] [Win 10.1 Pro] 
MonitorMonitorKeyboardPower
[LG 29UM65 (2560x1080)] [QNIX Evo II LED (2560x1440)] [WASD v2 Tenkeyless] [NZXT Hale90 v2 ] 
CaseMouseMouse PadAudio
[ThermalTake GT10 Snow Edition] [Razer Mamba - Chroma] [Razer Kabuto] [Razer Man O' War] 
CPUMotherboardGraphicsRAM
i7 4770HQ Intel HM87 Express Chipset Geforce GTX 860M 8GB DDR3L 1600 MHz 
Hard DriveOptical DriveCoolingOS
Samsung SSD EVO DVD-RW Stock Windows 8.1 
Monitor
1920x1080 TN 
  hide details  
Reply
Snowdevil
(16 items)
 
ASUS G750JM
(9 items)
 
 
CPUMotherboardGraphicsGraphics
[i7 4790K @ 4.4 GHz (1.186v)] [Asus Sabertooth Z97 Mark S] [nVidia Geforce GTX 1080] [nVidia Geforce GTX 1080] 
RAMHard DriveCoolingOS
[G.Skill 32GB DDR3 2133 MHz] [Crucial MX100 256GB] [Phanteks PH-TC12DX] [Win 10.1 Pro] 
MonitorMonitorKeyboardPower
[LG 29UM65 (2560x1080)] [QNIX Evo II LED (2560x1440)] [WASD v2 Tenkeyless] [NZXT Hale90 v2 ] 
CaseMouseMouse PadAudio
[ThermalTake GT10 Snow Edition] [Razer Mamba - Chroma] [Razer Kabuto] [Razer Man O' War] 
CPUMotherboardGraphicsRAM
i7 4770HQ Intel HM87 Express Chipset Geforce GTX 860M 8GB DDR3L 1600 MHz 
Hard DriveOptical DriveCoolingOS
Samsung SSD EVO DVD-RW Stock Windows 8.1 
Monitor
1920x1080 TN 
  hide details  
Reply
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