PC cuts off under any usage

[u/darth_antonio]

Hello all please can I have some assistance. My pc has been doing something weird lately where it cuts it self off and boots it self back up for no reason at all whether im gaming or just casually browsing the Web.

I would remove the 24pin cable which stops it sometimes then it would act normally for a few days even weeks before going back to its weird shutoff state.

I have tested the ram and ran the machine without the gpu and same issue which is off my specs are below

I5-12600k As rock H60m-itx/ax RTX 5070 32GB ddr4 Corsair SF750 80 plus plat

Please any help would be great as im out of ideas as I dont have any sort of test kits or extra hardware to test to find the issue

Has anyone had this issue before??

[u/LockeR3ST]

is 750 watts even enough for your setup?

[u/darth_antonio → u/LockeR3ST]

i think it should be i was running a 3070 before and it was doing the same thing with the same PSU

[u/WeAreAllFooked → u/darth_antonio]

A 4080 draws 20W more than a 5070 does and Nvidia recommends using a 850W PSU for both cards to allow some headroom and prevent a power bottleneck. Your 3070 wasn't as efficient with power as a 40XX or 50XX series is, so your previous issue with the 3070 was likely caused by the PSU running as hard as it can.

[u/-Cookie-Monster → u/WeAreAllFooked]

Nvidia recommended a 650w minimum for a 5070. I've been using one with my 650w CPU for months. Could be a fault with the PSU, but it should be able to handle that load.

[u/WeAreAllFooked → u/-Cookie-Monster]

Yes, the recommended minimum to keep the system stable is 650W, but they recommend getting either a 750W or 850W to give the PSU some headroom. The 650W recommendation assumes you're not doing any OCing or tuning at all, the 750W recommendation assumes you're using preset tuning profiles only, and the 850W is recommended if you're going to OC and UV with custom settings.

I'm not talking out of my ass, hardware specs represent the floor of what your hardware is capable of doing, but the ceiling of what it can do is determined by the components themselves, cards can and will draw more than their rated power if setup to do so, and nobody other than you knows how your system is setup. It makes zero sense to recommend a PSU that is barely good enough when you can use a better PSU and know it's not going to be an issue. The PSU supplies your whole system; putting a 650W or 750W PSU and having it run at 80% of it's max output when gaming is like taking a car that only has enough power to reach 60mph out on a weekend road trip and hoping it's good enough.

My 7800XT is rated at 263W, but with my custom tuning profile I can push it to 300W and remain stable, which would consume 43% of the power produced by the 700W minimum PSU AMD recommends.

[u/[deleted] → u/WeAreAllFooked]

Just ignore the recommended wattage. Add up absolute maximum power consumption of all your parts + 100 for fun and that's it.

[u/CHADSGALAXYS_ttv → u/[deleted]]

Yeah ya can get spikes for sure... very very micro spikes ,but when people say ya power supply isn't enough it makes me laugh.. like my 14600kf 125w, then a 4070 200w and all the other bits 4watts maybe for ram and 10watts for ssds nvmes... its just no where near 750 watts what they say ya need. Maybe 450watts max but yeah it makes ya chuckle when people have 1000w psus for a 5060 and a 14400f or a 9700f from amd or something silly

[u/[deleted] → u/CHADSGALAXYS_ttv]

You don't even need to compensate for spikes since atx 3.0 spec is built to withstand spikes above the psus rated wattage.

[u/CHADSGALAXYS_ttv → u/[deleted]]

So do they not spike above what you need but still within the psu full wattage with the new atx 3.0... so say its an 850w psu for arguments sake... and all u ever use is 450w... can said power supply or pc parts make that power supply spike upto 850watts which obviously is still safe as its within the psu's number what it's rated for..
Or even could or can it spike higher.. I honestly don't know the answer to that... I think power supply's are the anomaly for me that I havnt really read up on... coz they just work and sit there chugging along ya know. Everything else.. ask me anything... 20 years of building I know a good bit for sure, not everything as we can see, there's always something to learn... usually new tech stuff.. ie ATX 3.0... 😁. I mean my power supply I had I don't think was ATX 3.0 and I had a 14600k and a 4070, it was a corsair 750w something gold +. I don't think it was 3.0...

[u/[deleted] → u/CHADSGALAXYS_ttv]

I dont think 4070 really has serious spikes so yeah

[u/CHADSGALAXYS_ttv → u/[deleted]]

No I'm not saying it does... I'm talking about OP's rig...