Question Started with overheating CPU

[PiratePete]

ok, this one is weird as .
17 14700k Raptorlake
32Gb DDR5 cl30
2 x 2Gb M.2 ( 1 for steam and 1 for EA games)
1 GB M.2 as operating system and core security apps,
Platinum 1000W PS
Zotac 4070 ti 16Gb
Gigabyte Z790 Eagle
Win 11 pro

Started to overheat, CPU only.
MB installed Nov last year and BIOS updated to then current.
CPU on start up started to go straight to 60c (140F) then over 3 to 4 seconds, straight to 90, then 97C(206F). Always shutoff as it approached 97c.
Pulled the CPU and had it checked, Supplier ran it on their test bench for 30 minutes and all within parameters.
Re installed CPU and installed new water block self contained cooling.
Computer would not post. Came with Gigabyte ( AMI Bios) 5 beeps. mm CPU RAM or GPU.
Now for the weird stuff.
Dropped out 1 stick of ram and still no post. Then tried each combo of ram and different slots. Same result.
Changed MB to a B750M. Still the same.
Tried removing the 4070 and she posted to bios.
Replaced the 4070 and did not connect the power cable to the 4070 and she posted.
Thoughts starting to go down the Power Supply line as not much else was making any sense.
Got a new Platinum PS and low and behold, it would not even power up.
Put the original 1000w PS back in and back to no posting unless GPU is not powered up by cable.
Will be getting another PS tomorrow as everything is shut now.

Any thoughts apart from a sledgehammer?

 

[Gururu]

For clarification, by posting you mean you can get to BIOS only but Win is not loading? Or it gets to Win but the CPU is still running hot?

 

[Lutfij]

Welcome to the forums, newcomer!

17 14700k Raptorlake
How are you cooling the processor? You forgot to mention the make and model of your case.

32Gb DDR5 cl30
Got a link to the ram kit you're working with?

Platinum 1000W PS
1000W is the advertised wattage of the unit, what is the make, model and age of the unit?
+
Got a new Platinum PS and low and behold, it would not even power up.
Put the original 1000w PS back in and back to no posting unless GPU is not powered up by cable.
Would be a good idea to mention both unit's makes and models.

MB installed Nov last year and BIOS updated to then current.
For the sake of relevance, please mention the BIOS version for your motherboard at this moment of time.

CPU on start up started to go straight to 60c (140F) then over 3 to 4 seconds, straight to 90, then 97C(206F). Always shutoff as it approached 97c.
If you're working with an AIO, it's possible you're AIO has developed cavitation in the pump block, hence the heat isn't being dissipated.

Re installed CPU and installed new water block self contained cooling.
So you're working with an AIO.

Inspect the CPU's socket for any bent or broken pins.

Will be getting another PS tomorrow as everything is shut now.
Might want to source(borrow, not buy) a reliably built 850W unit from a friend or neighbor and see if the issue is averted.