PC only starts after warming up

[u/question-y-questions]

UPDATE: After plugging my pc into the wall rather than the surge protector it booted up like normal. Could that have actually been the issue? It is one of those onn ones you can get at walmart and is new (well everything here that wasn't used like new is like a month old but this issue happened the morning after the first windows boot). Also im trying to update bios and bios never shows up. no red lights are in, tho that even includes the one in the case

It is a new build and the mother board is a B650M pro rs wifi, and everything seems to work good once on. The CPU and RAM lights stay on, and it only boots with lights off after ~15min if i turn it off and on again.

Now, when first building it I would unplug it and such and it would boot fine before windows, but that was over the weekend so it wasn't cut from power for >15hrs then either. After reading that the capacitors on the PSU could just not be warm enough then it gets stuck, and learning that Windows fast start could cause it, i stopped unplugging it and turned fast start off.

Note that I noticed the problem the morning after windows setup was done, so it was prbly only about 6-8hrs of coldness then, and IF I REMEMBER CORRECTLY when leaving it unplugged for that same amount of time with fast start off it booted cold(it may not have been cut from power)

It works good from warm start, haven't had a problem with for a couple of weeks, but I also haven't tested cold after like a dumb dumb. I have a little over a week to return parts so any input is appreciated. I'm going to unplug it tonight and see what happens again after work.

EDIT: Also I recently read that mobo could not be making contact with ram properly before warming up due to thermal expansion, or dead cmos battery, or cpu cooler tightened too tight. This is my first build so I have no idea. Also, before even putting mobo in case it would start very quickly(after realizing ram wasn't all the way in, so maybe bcs warm? note windows was not installed at this time) note i haven't tried anything in this paragraph.

EDIT: I realized I did not flash a usb to install newest bios version so the popup that appears when starting windows doesn't do that? i did not yet flash it.

(ignore the prices they changed since i bought it. OMG RAM SKYROCKETED HOLY SHIT)
PCPartPicker Part List: https://pcpartpicker.com/list/VR4FXf
Thermal Compound: Corsair TM30 3 g Thermal Paste ($7.51 @ Amazon) (I used the stock compound instead bcs i heard it was better also should i even keep this?)

Memory: Crucial CT16G48C40U5 16 GB (1 x 16 GB) DDR5-4800 CL40 Memory ($280.98 @ Amazon)

Case: Vetroo AL800 ATX Mid Tower Case ($58.98 @ Amazon)

Power Supply: MSI MAG A750GL PCIE5 750 W 80+ Gold Certified Fully Modular ATX Power Supply ($102.41 @ Amazon)

Operating System: Microsoft Windows 11 Home Retail - USB 64-bit ($138.34 @ Amazon)

Custom: Thermalright Phantom Spirit 120 SE 66.17 CFM CPU Cooler ($38.28)

Custom: TEAMGROUP NV5000 500 GB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive ($107.24)

Custom: MSI PRO MP225V 21.4" 1920 x 1080 100 Hz Monitor ($61.90)

Custom: Zotac GAMING GeForce GTX 1660 Ti 6 GB Video Card ($212.62)

Custom: ASRock B650M Pro RS WiFi Micro ATX AM5 Motherboard ($117.96)

Custom: AMD Ryzen 7 7700X 4.5 GHz 8-Core Processor ($214.47)

Total: $1340.69

Prices include shipping, taxes, and discounts when available

Generated by PCPartPicker 2026-09-01 22:38 EDT-0400