Hello! I have a newly built desktop (PC's specs are listed below) for around 1 month but it has been frozen randomly, like when idling, google chrome, it happens around every 5 to 12 hours (normally), sometimes it won't freeze even I leave it idle overnight for 12 hours but sometimes just few mins after reboot, nothing is working when the problem occurs, not the keyboard, mouse and just a freezing screen (no bluescreen or error window) I have to do a hard shut down everytime. However, when I plug my monitor HDMI cable from my graphic card (RTX2080) port to my motherboard HDMI port (and my device manager will show a new display adaptor: Intel(R) UHD Graphics 630), my PC won't freeze anymore (at least 24hrs so far). I am really noob about PC stuff so I wonder if it really my RTX2080 graphic card problem? I saw some people have the similar problem but not exactly same as me said SSD, PSU or motherboard is the main problem actually. So I hope if anyone can tell me how to find out the possible cause(s) in case I spending more money on a normal hardware. The methods I have tried are list below too. Thanks so much
new update:
Windows 10 Home 64-bit Full Version Box USB
My PC's specs:
- CPU: Intel i7-8700K (3.7GHz)
- Graphic Card: MSI RTX2080 GAMING X TRIO OC Edition 8GB GDDR6 3 Fans
- MB: ASUS ROG Strix Z390F Gaming
- RAM: G.SKILL Trident Z RGB DDR4 3600MHz (2x8GB)
- SSD: Samsung 500GB 970 EVO M.2 NVMe
- HDD: WD Blue WD10SPZX 2.5" 1TB 5400rpm 128MB Cache SATA3
- Cooling: NZXT Kraken X62 Water Cooling
- PSU: Corsair RM750X 750W 80Plus Gold
- Network Adapter: ASUS PCE-AC88 AC3100 Dual-band 4x4 PCIE Wireless Adapter
Methods I have tried but all failed:

new update:
- I just found out if I leave my PC idling and not using any other program intentionally (I.e. just idling on desktop and leaving some basic softwares, programs on e.g., anti-virus software, network), my PC wont freeze even I am using the RTX 2080 graphic card
- using FurMark for testing my RTX2080 graphic card for around 15 mins and no freezing or crashing
- Joulemeter Taskbar shows my PC power consumption is under 200W even under the FurMark test
Windows 10 Home 64-bit Full Version Box USB
My PC's specs:
- CPU: Intel i7-8700K (3.7GHz)
- Graphic Card: MSI RTX2080 GAMING X TRIO OC Edition 8GB GDDR6 3 Fans
- MB: ASUS ROG Strix Z390F Gaming
- RAM: G.SKILL Trident Z RGB DDR4 3600MHz (2x8GB)
- SSD: Samsung 500GB 970 EVO M.2 NVMe
- HDD: WD Blue WD10SPZX 2.5" 1TB 5400rpm 128MB Cache SATA3
- Cooling: NZXT Kraken X62 Water Cooling
- PSU: Corsair RM750X 750W 80Plus Gold
- Network Adapter: ASUS PCE-AC88 AC3100 Dual-band 4x4 PCIE Wireless Adapter
Methods I have tried but all failed:
- Memtest86 (free version) and no error founds
- Windows Clean Boot (but some programs can't be disabled in System Configuration like "AsusUpdateCheck")
- Reinstall Windows (clean install) (by my Windows 10 Home 64-bit Full Version Box USB)
- Update all drivers in the Device Manager (I manually select all drivers and search updated driver software automatically)
- Download and update my graphic card, SSD, Motherboard, Network adaptor drivers from its official website
- Windows Update check is latest
- Look at the Event viewer (administrative events) and no possible error/warning founds
- Look at the Task scheduler
- Update BIOS
- BIOS set to default
- In my BIOS changing "primary display" from "AUTO" to "PCIE"
- In my BIOS changing "Above 4G Decoding" from "Disabled" to "Enabled"
- Change my HDD SATA power Cable
- Use avast Cleanup
- Uninstall all third-party Anti-virus software (just leaving the Windows defender on)
- Use 2 RAMs together OR try each RAM individually on my motherboard A2 RAM port
- Turn on my GPU's fans by MSIAfterBurner all the time (my GPU's fans won't run if temperature is below 60°C by default)
- Observe my CPU, graphic card & RAM's condition, the temperature, loading were normal right before freeze
- Clean PC's temp file
- Adjust virtual memory
- Run windows disk check
- Run a windows system file check
- Turn off Link state power management
- Set my PC power plan to highest performance or balanced
- Set my Hard Disk "turn off hard disk after __" to never
- Turn off all windows background apps