Aorus X470 build - no boot after a week

kelainefes

kelainefes

kelainefes

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Joined
11 Aug 2018
Posts
8
Location
London
Hi all, I'm here looking for help.
As title says, I built a new pc a week ago, now it is failing to boot, the led alternates between CPU (like 3-4 seconds) and DRAM (just a short flash).
It happened after I restarted from Windows, bios/oc settings had not been changed in that session.
I had installed a big CPU cooler like 30 minutes before but the PC behaved just fine up until that moment, and the idle CPU temp was about 10c lower compared to stock.

I tried putting the stock cooling back, booting with only one stick of memory in all of the slots, reseated the CPU, cleared the CMOS with a jumper as well, even bought another DDR4 stick just to see if the memory was damaged, all to no effect.

Here's the specs:

Mobo: Gigabyte Aorus Gaming Ultra X470
CPU: AMD Ryzen 5 2600
Memory: Corsair Vengeance LPX 3000 2x4GB (CMK8GX4M2B3000C15)
Storage: WD Black NVMe 250GB (WDS250G2X0C)
GPU: EVGA GeForce GTX 1050 Ti SC GAMING
PSU: OCZ ModXstream-Pro 600w
OS: Windows 10 Home x64

The cpu was running at 3.85GHz (100*38.5) and the mem was going at 3200 using XMP timings.
System had been stable so far, I had only gamed a bit and used prime95 for a few minutes with it so far though.
Stock cooling was good while gaming (about 50-55c max) but not for stress testing, I was manually canceling when the temp went over 70c, which it did every time within a few minutes.

Please advise on what can be attempted to get this system to boot before I have to get another motherboard.
 
Hi there, thx for the reply, EsaT, so what you mean is that my PSU crapped his pants and died, that it killed some other component, or maybe both?
I did test it (voltmeter only) before the build and voltages were spot on, although I know this does not mean much without an oscilloscope test.
Is that diagnostic LED pattern typical of something?
 
The cooler used was a Silenx iXtrema PRO IXC120HA2, a 4*8mm heatpipes tower, direct contact, aluminium fins, tower style.
I used the cooler master AM4 retention kit to install it on the board, as it bolts on the board's backplate. Mobo was horizontal.
Thermal paste used was Thermal Grizzly Kryonaut as it's easy to spread, offers good performance and it's non conducting.
 
Update: I purchased a new PSU, the Corsair SF450, based on the review by Jonnyguru.
It is powerful enough for my system and cheap aswell.
Installed it, issue presents itself in the same way.
I will swap the mobo next, at least I will be sure that any future issue will not be caused by an ageing, defective PSU.
 
New update: mobo arrived yesterday, installed it and boot at first try.
Passed 1 hour prime95 blend test, so the first impression is that issues where limited to the motherboard.
 
Much to my dismay, the same issue came back today.
I'm at a loss as to what it could have been as last time I used my pc everything was fine, then today it is refusing to boot.
Any ideas?
 
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