Question Updated CPU for my PC with rtx 4070 now my screen keeps going black

[inzanezain]

Original specs

Motherboard:X570 Aorus Elite wifi rev 1.0
Ram: G.SKILL Trident Z (Intel XMP) DDR4 RAM 64gb
CPU :Ryzen 5 3600
GPU: Asus dual GeForce RTX 4070 OC 12gb
PSU: Phanteks PH650g 650w PSU

PC was working fine.

I then bought Ryzen 7 5700x

Updated bios F39 version

Installed new cpu. Didn't notice the issue then. But I wanted to get Ryzen 7 5800x3d so couple days later I replaced the CPU again

That's when the noticed all the issues.

My PC will screen will go black and I will hear hardware device disconnecting noise like I unplugged a flashdrive.

My GPU would still have its fan running. Screen won't come back unless I restart the PC. Seems like the PC is still running as I still hear my music playing on Spotify.

It happens when starting the game, sometimes when desktop is loading. Sometimes PC screen doesn't even show up when I start the PC.

I tried everything

I did ddu and uninstalled the driver's for the GPU and reinstalled it. I uninstalled the chipset processors and reinstalled them.

Cleared cmos when trying both CPUs

Playing with bios with xmp enabled and disabled, I believe was enabled prior to CPU install.
Enabling and disabled 4 decoding
Enabled and disabled bars

I tried both the cpu, Ryzen 7 5700x and Ryzen 7 5800x3d with the rtx 4070 and same issue occurs. My screen will eventually randomly go black.

I plugged in my old GPU, gtx 1040ti and it runs on both CPUs without any issues and no black screen appearing.

I don't know what's going on and what to try anymore.

Besides doing a fresh window install

 

[Bob.B]

Original specs

Motherboard:X570 Aorus Elite wifi rev 1.0
Ram: G.SKILL Trident Z (Intel XMP) DDR4 RAM 64gb
CPU :Ryzen 5 3600
GPU: Asus dual GeForce RTX 4070 OC 12gb
PSU: Phanteks PH650g 650w PSU

PC was working fine.

I then bought Ryzen 7 5700x

Updated bios F39 version

Installed new cpu. Didn't notice the issue then. But I wanted to get Ryzen 7 5800x3d so couple days later I replaced the CPU again

That's when the noticed all the issues.

My PC will screen will go black and I will hear hardware device disconnecting noise like I unplugged a flashdrive.

My GPU would still have its fan running. Screen won't come back unless I restart the PC. Seems like the PC is still running as I still hear my music playing on Spotify.

It happens when starting the game, sometimes when desktop is loading. Sometimes PC screen doesn't even show up when I start the PC.

I tried everything

I did ddu and uninstalled the driver's for the GPU and reinstalled it. I uninstalled the chipset processors and reinstalled them.

Cleared cmos when trying both CPUs

Playing with bios with xmp enabled and disabled, I believe was enabled prior to CPU install.
Enabling and disabled 4 decoding
Enabled and disabled bars

I tried both the cpu, Ryzen 7 5700x and Ryzen 7 5800x3d with the rtx 4070 and same issue occurs. My screen will eventually randomly go black.

I plugged in my old GPU, gtx 1040ti and it runs on both CPUs without any issues and no black screen appearing.

I don't know what's going on and what to try anymore.

Besides doing a fresh window install

You might want to bump the psu to a quality 750w or larger unit.

 

[inzanezain]

You might want to bump the psu to a quality 750w or larger unit.

I understand but I don't see my watt meter going past 400w

 

[faalin]

The 4070 is rated at 200 watts, for very short bursts (up to 100 ms) it can pull 200% or 400 watts know as transient spikes. The spikes are fast enough that normal monitoring software cant even pick them up.

These spikes were bad back in the Nvidia 2000/3000 series cards, for the 4000 series cards they are still there but you are supposed to use an ATX 3.0 power supply as they are ratted for these power spikes now, the ATX 2.0 PSU were not rated for the spikes. Say you had a 2080 TI which is recommending a 650w PSU from nvidia, most sites were recommending a 850w minimum if not a 1000w PSU for the card. I ran a EVGA 750w G2 psu on my 2080 Ti and had issues, i ended up using a 1600W G2 that i had from an older build and never had issues again.

I was using the same 1600w G2 on my new build but did not like using the 2 8pin to 12pin dongle, ended up buying a 1200w Asus Thor PSU since my card was from asus and the plugs should match up nice and tight.

Nvidia recommends a 650w PSU for your 4070 OC, i would look at a minimum 750w ATX 3.0 power supply. Something like this would get the job done LINK