Z370 Taichi no post with i7-8700k

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   Hello everyone,

Brand new build with an i7-8700k, Z370 Taichi.
I left my rig yesterday on with desktop displayed so no load at all. When I came back 3 hours later the screen was black and computer was still running with all fans but it hasn't woken up since then.
I can't get to the bios. Dr Debugger at the beginning was showing codes randomly:
63 / 64 / 6A .
After few boot attempts it shows only 63 for now.
I checked the socket - no bent pins. 
Cleared cmos a few times, switched to the second bios, tried with one ram stick in different slots - no luck.

Bios P1.80 
Memory: Patriot Viper Led White 16GB 3600MHz CL16 DUA - PVLW416G360C6K (no oc)
CPU: Intel 8700K 
Cooler: Thermalright Le Grand Macho RT (with Arctic MX-2 paste)

I have overclocked the CPU to 4,8Ghz using an offset of -130 and AVX 0.
I didn't use AVX instructions while stress testing though.

Core multi = 48
Cache ratio = 44

Cpu v max = 1.288v - 1.326v (lower value for normal usage and higher for stress testing)
vccio = 1.00v
vccsa = 1.05v
dram voltage = 1,35v

Any help would be greatly appreciated!

Edited by swissarmy - 15 Jun 2018 at 10:33pm

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swissarmy Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Jun 2018 Status: Offline Points: 4	Post Options Post Reply Quote swissarmy Report Post Thanks(0) Quote Reply Topic: Z370 Taichi no post with i7-8700k Posted: 15 Jun 2018 at 6:41pm
	Hello everyone, Brand new build with an i7-8700k, Z370 Taichi. I left my rig yesterday on with desktop displayed so no load at all. When I came back 3 hours later the screen was black and computer was still running with all fans but it hasn't woken up since then. I can't get to the bios. Dr Debugger at the beginning was showing codes randomly: 63 / 64 / 6A . After few boot attempts it shows only 63 for now. I checked the socket - no bent pins. Cleared cmos a few times, switched to the second bios, tried with one ram stick in different slots - no luck. Bios P1.80 Memory: Patriot Viper Led White 16GB 3600MHz CL16 DUA - PVLW416G360C6K (no oc) CPU: Intel 8700K Cooler: Thermalright Le Grand Macho RT (with Arctic MX-2 paste) I have overclocked the CPU to 4,8Ghz using an offset of -130 and AVX 0. I didn't use AVX instructions while stress testing though. Core multi = 48 Cache ratio = 44 Cpu v max = 1.288v - 1.326v (lower value for normal usage and higher for stress testing) vccio = 1.00v vccsa = 1.05v dram voltage = 1,35v Any help would be greatly appreciated! Edited by swissarmy - 15 Jun 2018 at 10:33pm

badbri Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 20 Feb 2018 Location: USA Status: Offline Points: 415	Post Options Post Reply Quote badbri Report Post Thanks(0) Quote Reply Posted: 17 Jun 2018 at 11:56am
	Could be motherboard or cpu. Did you monitor all the temps while stress testing ? Sideways blowing cpu coolers can cause VRM overheating when overclocking if the case is not ventilating properly. Another issue is OC of the cache, not a good idea to OC cores and OC cache too even if just a little due to ripple effect which can cause problems when running OC ram (3600 is way above the Intel certed 2666) which can overheat the PHC. I suggest you follow the full CMOS reset mentioned here: http://forum.asrock.com/forum_posts.asp?TID=630&title=how-to-clear-cmos-via-battery-removal If it does boot, leave everything alone and see if it runs more than a few hours. Then you can try one OC at a time for a few hours. If it does not boot then you should contact Tech support http://forum.asrock.com/forum_posts.asp?TID=5265&title=howto-contact-tech-support edit forgot to include link ;p Edited by badbri - 17 Jun 2018 at 12:01pm
	https://www.passmark.com/baselines/V9/display.php?id=99573335296

swissarmy Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Jun 2018 Status: Offline Points: 4	Post Options Post Reply Quote swissarmy Report Post Thanks(0) Quote Reply Posted: 22 Jun 2018 at 4:34am
	So my CPU has been exchanged for a new one by a seller. I admit I'm a littlle bit scared of overclocking it now. Did I miss any crucial settings in BIOS? They all are in my last post. The temps (degree celcius) with my previous CPU were just fine I think: - PRIME95 small test - average 75, max 77-76 (3 hours) - PRIME95 blend test - average 63-75, max 80-79 (3 hours) - IET cpu test - average 63, max 67-68 (3 hours) Is it all fine? Is it possible that my mainboard gives too much power on parameters I didn't monitor and they were just too high because I left them on "AUTO" (like PLL or ST)? Maybe I should stay with fixed voltage (~1,3v) because the offset settings had too high value (-130)? Is ~1,3 voltage safe for daily use? Edited by swissarmy - 22 Jun 2018 at 4:57am