New build - No GPU output until I restart PC

Gopher_By_Fende

Gopher_By_Fende

Gopher_By_Fende

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6 Sep 2005
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244
Hi all

I built a new system yesterday, which includes an ASRock B850M-Pro A WiFi mobo, Ryzen 7 7700 and Gigabyte Radeon RX 7700XT.

When turning on the PC, I get no output from the GPU (onboard video works). If I hit the reset button, GPU now outputs fine. If I turn off the PC, the same issue happens again next time I turn on, I have to hit reset after powering up before the GPU outputs.

I’ve checked everything looks to be seated correctly, all plugs firm, bios flashed, and latest drivers installed.

Has this happened to anyone else, and any suggestions on what else to try before I start assuming the GPU or mobo is faulty?

Thanks
 
tamzzy said:
check the bios to see whether it uses the igpu or the 7700xt to display
Click to expand...
Thanks I’ll check that when I’m home, but the onboard gpu seems to work from cold, and the 7700 only on a reset.
Tetras said:
What order do you turn the monitor on versus the PC?
Click to expand...
The monitor has been left on currently, it will usually come off standby when I turn the pc on, then announce there’s no signal coming from whichever port I’ve connected to (hdmi/display port) then go back to standby. Then when I reset it wakes up and displays fine
 
Checked bios and the only option I can see is for display priority which is set to external GPU. I did just update the bios again as I realised I hadn’t downloaded the latest, and the first boot after flashing it did work without resetting, however after powering down again it’s back to the same
 
Gopher_By_Fende said:
Checked bios and the only option I can see is for display priority which is set to external GPU. I did just update the bios again as I realised I hadn’t downloaded the latest, and the first boot after flashing it did work without resetting, however after powering down again it’s back to the same
Click to expand...

gonna need to do a bit more troubleshooting unfortunately, and i've never seen this happening before :/
first thing is, to try your old gpu in the new build and see if the same thing happens too

if the issue doesn't occur with the old gpu then it's the new gpu
if the issue still occurs with the old gpu then the next thing i would do is to disable the igpu in bios and then retest with the new gpu reinstalled
 
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So I managed to find a setting for disabling the iGPU buried in the BIOS, it was set to auto which means it should disable the iGPU if an external output is detected. Now when I start up from cold or restart the card is outputting fine so I think its solved.
Only thing I've noticed is it takes longer to start up from cold with the card than the iGPU on first boot (not much maybe 30 seconds more), so thinking maybe it was the card taking a while to start up from cold, by which time the mobo had decided there was external graphics and kicked in the iGPU, but that may be well off.

Either way, it *seems* to be resolved so thanks for the help and the suggestion to disable the internal graphics :)
 
Gopher_By_Fende said:
Only thing I've noticed is it takes longer to start up from cold with the card than the iGPU on first boot (not much maybe 30 seconds more), so thinking maybe it was the card taking a while to start up from cold, by which time the mobo had decided there was external graphics and kicked in the iGPU, but that may be well off.
Click to expand...
enable the setting called memory context restore
 
I've done both and I think its a bit quicker now thanks :)

I don't think the initial issue is totall resolved yet, as I went for dinner and when I came back the PC had gone to sleep, and while it seemed to wake up when I moved the mouse (fans/RGBs turned back on) I got no video again until I restarted. I could work around this by just disabling hibernate, but would be good to determine if anything is faulty, so I'll have to keep investigating I think
 
Gopher_By_Fende said:
I don't think the initial issue is totall resolved yet, as I went for dinner and when I came back the PC had gone to sleep, and while it seemed to wake up when I moved the mouse (fans/RGBs turned back on) I got no video again until I restarted. I could work around this by just disabling hibernate, but would be good to determine if anything is faulty, so I'll have to keep investigating I think
Click to expand...
that's very odd...just humour me
1) use another port that you connect the pcie cable on the psu (i assume you bought the nzxt amp 650 yea?)
2) reseat your ram
3) reseat your gpu
4) in bios, make sure that fast boot is disabled

let me know what happens after
 
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Cheers I'll give it a try.
I'll reseat the RAM again, I did move it from slots A1/A2 to A2/B2 when I first booted after building, as it looked like I was getting a CPU/RAM error (However this may have been the GPU issue all along)
I did get the 650. It has 4 pcie/cpu ports, so theres currently 1 free, and the GPU uses 2 of them already. I'll move one across, if no change, ill move the other across and let you know
 
Gopher_By_Fende said:
I did move it from slots A1/A2 to A2/B2 when I first booted after building, as it looked like I was getting a CPU/RAM error (However this may have been the GPU issue all along)
Click to expand...
A2B2 are the correct slots to use

(not to teach you how to suck eggs)
cpu -> blank -> ram -> blank -> ram

Gopher_By_Fende said:
I did get the 650. It has 4 pcie/cpu ports, so theres currently 1 free, and the GPU uses 2 of them already.
Click to expand...
i assume you're using 2 separate cables individually and not daisy chaining the connectors, which is the correct way to do it

PS I did a ninja edit to add (3) and (4) in the post above too
re: gpu seating, make sure it clicks down and the pcie latch is engaged
 
So this is what I've tried so far -

Reseated RAM into A1/A2 (Before I saw your above post, I was not aware of this so no eggs being sucked here, a lot has changed since my last PC build it seems lol, no more pairing up sticks it appears)
When I did that, the PC started power cycling when I tried to turn it on, and after moving the RAM back to A2/B2, it would not boot until I cleared CMOS.
Changed port on PSU, no change (I am using 2 cables, one to power each of the 8 pin sockets on the GPU)
Removed and reseated GPU again, no change.

Current BIOS changes are -
dGPU mode only enabled
Fast boot disabled
PCIe x16 Link Speed changed from auto to Gen4
DRAM Frequency changed from auto to 5600
Memory Context Restore enabled

This is the current behaviour -

When booting from off ->

CPU/RAM Dysfunction lights display, GPU fans and logo light come on
GPU fans go off (logo stays lit)
10-15 seconds later, CPU/RAM lights go off briefly, GPU fans come on then off again, and CPU/RAM lights come back on again
This usually happens once more with the same 10-15 delay, however I have seen at least once it cycle this behaviour 3 times
Finally CPU/RAM lights go off, the VGA light flashes briefly then it boots fine

If I then restart from this state, none of this happens. the CPU/RAM then VGA lights flash briefly, GPU kicks in, PC boots fine.

If I power down and restart from off again, the delays start again.

I did try a stress test on the GPU using Furmark and it seems to run fine, with a score above the average for a 7700

The CPU/RAM lights staying on would make me think they are the issue, however when the iGPU is enabled, then it starts straight away, but only with the iGPU outputting video

I've had some confusing PC issues over the years but this one is up there
 
Gopher_By_Fende said:
So this is what I've tried so far -

Reseated RAM into A1/A2 (Before I saw your above post, I was not aware of this so no eggs being sucked here, a lot has changed since my last PC build it seems lol, no more pairing up sticks it appears)
When I did that, the PC started power cycling when I tried to turn it on, and after moving the RAM back to A2/B2, it would not boot until I cleared CMOS.
Changed port on PSU, no change (I am using 2 cables, one to power each of the 8 pin sockets on the GPU)
Removed and reseated GPU again, no change.

Current BIOS changes are -
dGPU mode only enabled
Fast boot disabled
PCIe x16 Link Speed changed from auto to Gen4
DRAM Frequency changed from auto to 5600
Memory Context Restore enabled

This is the current behaviour -

When booting from off ->

CPU/RAM Dysfunction lights display, GPU fans and logo light come on
GPU fans go off (logo stays lit)
10-15 seconds later, CPU/RAM lights go off briefly, GPU fans come on then off again, and CPU/RAM lights come back on again
This usually happens once more with the same 10-15 delay, however I have seen at least once it cycle this behaviour 3 times
Finally CPU/RAM lights go off, the VGA light flashes briefly then it boots fine

If I then restart from this state, none of this happens. the CPU/RAM then VGA lights flash briefly, GPU kicks in, PC boots fine.

If I power down and restart from off again, the delays start again.

I did try a stress test on the GPU using Furmark and it seems to run fine, with a score above the average for a 7700

The CPU/RAM lights staying on would make me think they are the issue, however when the iGPU is enabled, then it starts straight away, but only with the iGPU outputting video

I've had some confusing PC issues over the years but this one is up there
Click to expand...

Sounds like its double post (power on self test) itself, this usually happens on my ASUS board if I change something in the bios to do with RAM, your 2nd scenario is memory context restore doing its thing where it just flashes through the lights quickly, the first scenario sounds like memory training, however MCR is meant to stop that, personally see what happens with MCR disabled, I know its going to take a little longer to post, but see if it does the double post thing again where it goes through all the lights twice, if this is the case it sounds like an incompatibility, or it doesnt like your ram, which RAM are you using ? was it on the QVL for your motherboard ?

It could also be EXPO or XMP if you have those enabled, these have been known to cause issues, you could try enabling EXPO 2 if the option is there or even manual, but then youre going to need to enter your RAM speed, timings and voltages for ram yourself especially if youre using an XMP kit on an AMD motherboard.

Also as a side note, if you are going to use MCR, then you need to also enable power down enabled on Ryzen 7000.
 
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thanks, I’ll review the BIOs settings mentioned when I’m home. I have just checked the QVL list for the mobo, and I cant see KF556C40BBK2-64 listed but KF556C40BBAK2-64 is, which to my naive eyes looks to be the same stick but just with RGB?
 
Gopher_By_Fende said:
CPU/RAM Dysfunction lights display, GPU fans and logo light come on
GPU fans go off (logo stays lit)
10-15 seconds later, CPU/RAM lights go off briefly, GPU fans come on then off again, and CPU/RAM lights come back on again
This usually happens once more with the same 10-15 delay, however I have seen at least once it cycle this behaviour 3 times
Finally CPU/RAM lights go off, the VGA light flashes briefly then it boots fine
Click to expand...
sounds like a memory training issue.
have you tried with EXPO off?
 
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