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Faulty PSU or incompatibility?

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From the beginning.

With the Corsair RM850x shift installed

At first – I was stuck between Q code 19 and 78 and no boot possible.

Then I tried switching around ram sticks (g.skill tridents) never had issues with them but doing this gave B5s and other RAM related Q codes.

When placing the Ram back in the usual 4 dimm configuration – still, the mobo won’t boot and again, it alters between getting stuck at Q code 19 and 78

Q 78 is ‘ACPI module initialization’

Q 19 seems to be CPU abnormality of some sort – but I’m not sure exactly what that tells me.

Let’s jump back a few months.

When the initial PSU died (the fractal design) I swapped it with an old PSU from another system – along with an old NVIDIA GPU 400something, for testing.

That PSU, some budget no-name unit:

Specs are listed here if matters.

[URL unfurl=”true”]https://www.inter-tech.de/3444/EPS-750W_EN.html[/URL]

Now with that PSU I could get it to boot normally to windows (7 64) and run some old games n whatever testing.

So this PSU worked but it obviously couldn’t run the RTX3070 ti – not modular and lacks the cables.

Anyways, now jumping back to present time. With the RM850x PSU like I said it gets stuck at either code 19 or 78 and no boot.

And here’s the weird thing.

when I switch the RM850x out and try the old EPS-750W PSU – the system boots up fine on first attempt.

Does this mean the RM850x unit is faulty? Or somehow not compatible with this Mobo or Ram or something?

With the RM850x all case fans work and ditto the old nvidia 400series GPU’s fan – all except the CPU fans.

I’m using the same cables on both units – only difference is the ATX 24 pin cable on the RM850x is split with a 20 pin and a 4 pin – two different outputs – ending up in one 24 pin ATX.

Am I missing something obvious here?

Thanks for your time btw.

~
Specs:
CPU
I7-4930K

MOBO
Asus Rampage IV Black Edition

GPU
ASUS TUF-RTX3070TI-8G-GAMING

RAM
G.Skill TridentX Series / F3-2400C10Q-32GTX
Size: 32 GBytes
Count: 4 x 8 GB

SSD/Hard Drives
Samsung 840 Pro Series 512 GB

WD Black Series WD1003FZEX 1TB

Optical Drive
Asus DRW-24F1ST DVD Writer

Operating System
Win 7 Pro x64

Monitor
27″ Eizo FlexScan EV2736W
24″ Eizo FlexScan S2431W

Case
Phanteks Enthoo Primo

Cooling
Noctua NH-D14 SE2011

Power Supply
Fractal Design Newton R3 800W

Topic

Looks like a very old PC.

In reply to Faulty PSU or incompatibility?

The problem I find with such old PCs is you have to start as if no part is any good. Then work up from that premise.
Also, no, the story does not tell you what failed.

Reply To: Faulty PSU or incompatibility?

In reply to Faulty PSU or incompatibility?

Hmm, how on earth do I reply to a post on this thread 0.o

Anyways yep I built it back in 2014. Upgraded the GPU a few times and it’s been running like a trooper.

Since the system boots up perfectly when using an old spare PSU – and only fails with this new rm850x – I don’t see how it could not be the rm850x being cause?

I can’t use the old PSU though since it can’t handle the 3070 ti

Either I’m connecting something in a wrong way (if that’s even possible) or something is wrong with the rm850x – but since it lights up the mobo and all fans are spinning except the CPU fans – I just find it odd – afaik usually when a PSU is dead – it’s, well completely dead.

I can be wrong though

Only way to tell.

In reply to Reply To: Faulty PSU or incompatibility?

Try other power supplies.

I dismissed any error on your part such as not plugging in some connection or trying to use the power cables from the old PSU.

Not one PC owner in 4 decades has had the gear to diagnose why this doesn’t work. They can only swap parts till they figure it out.

Reply To: Faulty PSU or incompatibility?

In reply to Faulty PSU or incompatibility?

Thanks for the enthusiasm.
Well, I don’t see any use for a membership here.
Case closed and adios :^) 🖖🏻

[Author]

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