I am using the Corsair Vengeance CMR16GX4M2C3466C16

That's a B-die RAM kit, awesome for OC with Coffee Lake.
But since you're still new, I'd suggest letting it run at XMP profile with default VCCSA and VCCIO.
No tweaks is necessary.

Re-run Prime95 under custom loop just to make sure that my chip is not degraded.
This time I monitored the VRM temp through temp sensor cable plugged on the T_sensor header on the board.
FYI, the Hero X doesn't come with a built-in VRM temp sensor out of the board that's why I used the temp sensor cable that came with my Extreme IX.
The VRM temp idles at 43C while registering 66C at full load, looks fine.





As a comparison, VRM temps under...

Noctua NH-D15S: 42C idle, 59C load
CM MasterLiquid Pro 280: 42 idle. 69C load

From here you can see that the air generated by the fans mounted on the air cooler did help in chilling the VRM area.

This post has been edited by owikh84: Jan 2 2018, 07:01 AM

Not sure what really happen. I choose to run the prime95 custom and set everything according to your pic u share with 14000mb with 15min tome to run fft. Once i click start, a few worker stop immediately while others in self test mode. My cpu is not stress too coz the temp is at idle temp. Leave it for 2 hrs still not done. I try to stop the test but it wont let me do it. So i try to end task in task manager, an error pop out . I try again amd finally it close. Then i check my ram usage is now staying at 5.4gb. Really need help... Im very confuse now. One thing i notice is those worker who stop immediately are showing swap error something. ( Btw i shutdown my pc as i hv to go work)

This post has been edited by reconvision: Jan 2 2018, 09:15 AM

Errors pop up means your OC is not stable. Most likely is due to imsufficient voltage etc.
Try launching Prime95 under Administrator mode to fix the RAM usage issue.

Im still noob in prime 95. What can i do in prime95 administrator mode to fix the ram usage?

Edit : This is the error (Cannot initialize FFT code, errcode=1005 Unable to allocate memory. One possible cause is the operating system's swap area is too small)

This post has been edited by reconvision: Jan 2 2018, 09:41 AM

Right click on the Prime95 icon on your desktop , run as Administrator.

The error pops up because you're attempting to stress a lot of RAM more than the available capacity.

Don't simply enter 14000 MB in the Prime95. Check your avaiable memory through the Windows Task Manager then only assign the capacity to stress.

I mean by fixing the ram usage , do u mean i just run as administrator and stop the test that is runing in background?

I have 16gb (2 x8gb) so i thought it should be fine for 14000mb since i have nothing open at that time only core temp and hwinfo.

Not sure if it's just me but there's a bug in the Prime95 that won't stress full RAM unless I run it in admin mode.

Oh lol. I think you misunderstood. Usually my ram usage in idle will be 1.3gb but yesterday after i use task manager to end task the prime95 (since it wont allow me to stop it) n close the prime95. I found out my ram usage now idle at 5.4gb. so im worry did i do something wrong to the prime95 test that it mess up my ram usage?

Edit: in the task manager , the memory show memory composition with 2.5gb compress. Is this the result of setting too much ram in prime95 causes window to activate memory compression?

This post has been edited by reconvision: Jan 2 2018, 12:51 PM

Seems like something else is running in the background and using quite an amount of your RAM.
Usually Prime95 won't cause that. When I click stop my RAM usage will go down to a very low percentage.
Rebooting Windows will fix this or not?

Reboot seem to get back to default of 1.9 ram in used. Now I realise is my mistake for putting 14000mb as the size coz now i check the available ram is 13.8GB. Those stupid skype apps and window defender is eating up the ram to 1.9gb ram. Also forgot about the window cached that taking out 2.1gb no wonder my prime95 crash instantly...

In the task manager, I saw available ram is 13.6gb whereas inside the open resource monitor i saw free ram is 12gb. which one should I follow for prime95?

This post has been edited by reconvision: Jan 2 2018, 08:29 PM

I think better use the free RAM of 12GB as showed in the Open Resource Monitor screen, keep the balance for the rest of the system.
I'm thinking that if you set it too high the OS will start using pagefile and memory won't be tested properly.

Ok. Starting my prime test again now with 10000mb. Why after i press start already have a few workers stop working and show 0-minutes 0 error 0 warning? Is that normal? I can see my cpu is doing work becoz the temp raise to 60-70c.

Post the SS here with P95 screen, task manager etc.
Stressing 10000MB looks kinda small for a 16GB RAM.
Should take 95%+.

This post has been edited by owikh84: Jan 2 2018, 10:38 PM

Found out the problem. All along im using prime95 32bit =.=. Now running with 64bit prime. All workers is running now. I check the free ram before i start the test and it only have 11000mb so i set 10000mb.

Sorry for the trouble >.<. thanks for the help. Now i will pray to the overclock god for smooth test.

Bro Owikh84, the corsair h150i pro review is out.
(http://www.guru3d.com/articles-pages/corsair-h150i-pro-review,1.html). It seems like it is only slightly better than d15 . I guess delid would contribute more temp reduction.

Seems like the thermal results vary from one review to another so I think we will need to read more reviews to compare. Different review sites used different CPUs and software to stress the coolers.

Mainstream Intel CPUs from Ivy Bridge till the newest Coffee Lake themselves have inefficient stock thermal paste and excessive gap underneath the IHS so these factors also need to be taken into the account. The thermal results won't be as accurate as the ones tested on the enthusiast-class CPUs (ie. 3930K etc) with soldered thermal interface. Furthermore, bigger chips like the 3930K have larger contact surface than the smaller CPUs.

G3D: performs similarly compared to Kraken X62 (based on 4790K)

Vortez: beats Kraken X62 by 13C (based on 3930K)

OC3D: outperforms Kraken X62 by 14.5C (7700K @ 5.0GHz)

This post has been edited by owikh84: Jan 9 2018, 12:57 PM