svmlegacy

Shouldn't the bus speed be at 266.7 MHz for these chips? Seems like the BIOS is throttling or is in some form of energy saving mode... 105 x 6 is stange behaviour otherwise. T9900 should be 266.7 * 11.5 P8400 should be 266.7 * 8.5

Any specific reason you are going for Z790? I'm sure there's good ITX B760 / H770 boards out there.

Is there any specific features you need? Otherwise just go with what's cheap and available. The 12400 is not difficult to power.

In this case you've likely bent pins in the CPU socket or the CPU isn't seated correctly.

This is not true. Intel Core i7-2600 is for LGA1155. It's much more likely that the CPU is not allowed due to the higher TDP. I would reccomend trying a Core i7-2600S, as it has the matching 65 W TDP.

Any OC on the CPU? (Inc. PBO)

The laptop is performing better than designed with the TIM change. Laptops are designed to have the smallest viable cooler, keeping them as slim and lightweight as possible. Rest assured that in stock configuration (No OC) an Intel chip will live out its useful life, either through thermal throttling or naturally.

Why bother with a 4U? I just used a normal case for mine.

This is normal for for Comet Lake laptop chips

The Deep Cool Ice Edge Mini does not support LGA2011.

You should always be prepared for a system failure - reinstalling an OS during a hardware upgrade is always a great chance to practice it.

https://www.amazon.com/dp/B0B7NVXLLM/

Check the Chipset. If it's a 6x, no chance of Ivy. 7x should support Ivy, provided HP hasn't done any schenanigans in the BIOS. Do not attempt to upgrade to a 45 W TDP chip, most motherboards will reject them (even if the chip has a cTDP of 35 W available) HD4000 is not much better than HD3000. It will not run 3D games well (Even older titles) The i7-3632QM processor may also be a quad core option (albiet with slightly slower graphics than the 3540M). I have installed this in my own Toshiba laptop (Originally a i3-3120M) with success. Overall, I do not reccomend this upgrade unless the chip is literally free, in which case just try it.

Which Steel Legend board do you have (And what BIOS version, if possible)? It may be an older stock 600 series board which does not support Raptor Lake (13th gen) without a BIOS update.

Try removing the OC and seeing if the FPS changes. If it has no effect, then you can be certain that CPU performance is not the issue (a 3800X should be plenty for pushing WOW above 55 Hz.) What resolution are you playing at, and per the other posts, what are the settings you're using?

The CPU will protect itself from damage. That being said, that is rather hot for the configuration. I'd reccomend cleaning and redoing the thermal past application, and ensuring that the fans are ramping up to speed properly.

This depends a lot on Intel's future CPU releases for the platform, certainly the CPU can be upgraded later, and DDR4 will remain cheaper than DDR5 for the forseeable future.

You should be using the upper x16 PCIe slot.

The 5800X3D is especially prone to running hot due to the extra thermal interface used (essentially a silicon shim between the cores and IHS). It's one of the presumed reasons AMD disabled overclocking on the chip. That being said, it's not thermal throttling, so just leave it be.

If you indeed need 100% stability, just run it the way Intel intended. Check your turbo parameters to see if you indeed are power limited; I doubt you are while gaming, so increasing power limits won't help for that.

It's likely in setup mode still. Go into BIOS again and install default keys.

Yes.

Have you updated BIOS? X3D came a long time after the 5950.

Check for BIOS options, or if the manufacturer has any utilities for adjusting it. Many laptops change fan profiles based on the windows power mode, as well. (Lower power modes having a "quieter" profile)

A fresh install implies losing everything on that computer... OneDrive is a good backup if you don't have a lot of stuff to keep. Otherwise, many people use an external HDD. I use a NAS with a redundant RAID array.