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No boot with all cores enabled?

Associate
Joined
23 Jun 2016
Posts
155
Hi guys,

So I'm a bit demoralised at the moment... after a three week long project, I finally finished my watercooling loop with hardline tubing. I leak tested the PC for over a day, in addition to a few hours of testing with the PC on and stressed to ensure no leaks would emerge when the coolant heated up. No leaks so that was all good.

PC was running amazingly, hitting mid 40s (GPU+CPU) under load. While testing BF1, windows decides to reset and install some updates. While updating I walk away from the PC to make dinner, I come back and now the PC won't boot...

Basically it gets stuck when trying to load windows. After the option the boot to BIOS, the screen displays he ASUS logo but hangs, and I get either code Ad or F6. I swap out the RAM, turn off XMP, CMOS reset, qcode Ad. I tried booting from a windows boot disk, even when removing my m.2 so only left with my SATA, same error. Linux boot disk - qcode Ad. Then I try memtest, and the boot failed when testing multiprocessing, so I go back to BIOS and disable HT, and all but one CPU core, and BAM, memtest boots, and windows boots...

Right now I am tearing my hair out trying to figure out why nothing will boot when any more than one core is active. Thing is, it doesn't matter which core is active, as long as it is only one, which leads me to think it may not be the CPU...

I am going to try completely wiping BIOS, updating BIOS, and then reseating the CPU. Does anyone have any advice on what could be causing this?

I just don't understand how this has happened when none of the cores on the CPU were going above 45, the mosfets are cooled by the same block and they looked good too... how can a windows update cause such a ridiculous boot issue?

P.S system specs:

Asus deluxe II
i7 6850k running STOCK
64GB Trident Z 3200MhZ 14-14-14-16
Samsung 950 pro 512GB
Titan X Pascal

Water cooling:
EK Asus x99 monoblock
EK Titan XP full block + backplate
EK XE 360 + 3 x 3000RPM EK vardar push intake
Black ice nemesis 240 GTS + 2 x 3000 RPM EK Caesar pull exhaust
EK XRES 140 PWM D5
 
Last edited:
If the BIOS upodate doesn't work, try reseating the CPU, you might have the CPU block on too tight which can sometimes cause issues.
 
Do you think bent pins could be an issue? Thing is, if it was bent pins, I'm thinking it should've been an issue from the beginning, and not have emerged later right?
 
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