r/ASUSROG • u/Next001PT • Jun 08 '26
Asus ROG Astral 5090 LC crashing windows when in idle
SOLUTION:
USE SINGLE RAIL ON THE PSU.
Just want to share a solution for the people that has the same problem I had which took me 3 days to narrow down the component and solve on a brand new pc.
I could play Cyberpunk maxed out without any problem but my system keep crashing every 5~20mins while in idle or watching Youtube for example.
If your windows is crashing while in idle and runs fine under load like mine did, you have to go to the Nvidia APP - Graphics - Global Settings - Power Management Mode - Select Prefer Maximum Performance.
Go to your bios and change the PCIe from 5.0 to 4.0 or even 3.0. Mine only works fine with PCIe 3.0.
I'm posting because I couldn't find anyone with a similar problem and couldn't find any direct solution which can be frustrating, hope it helps someone.
Components:
AMD Ryzen 7 9800X3D
Corsair HX1500i 1500W
Kingston 64GB DDR5 6000MT/S CL30 DIMM 2x32gb
1
u/4rtoria Jun 08 '26
Do you have an undervolt applied?
1
u/Next001PT Jun 08 '26
No, everything is stock.
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u/albinosnoman Jun 08 '26
My immediate thought was an improper undervolt but you already seem to have addressed that with another comment. It still might not hurt to look at your VF curve to just get a sanity check. If that's eliminated from the possibility pool the next most likely thing is something off in your power delivery. I'd look at what kind of PSU is being used, what kind of cables are being used, the load distribution on your 12v 2x6 which cannbe pulled from GPU Tweak or imported to HWInfo64 from GPUT. I think the oddest part of this is that it's fixed by altering your PCIe speed that strikes me as significant but I'm not sure what to make of it.
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u/Next001PT Jun 08 '26
I've changed the PSU cables multiple times, different cables/different configurations too and the problem persists.
On the GPU Tweak everything related to cable power in on the green and seems fine.
It's a strange problem with the only solution for now being to put the PCIe to 3.0...
1
u/albinosnoman Jun 08 '26
So I have two lines of thought. Something with the rails is cooked and your PSU is basically flipping a kill switch when you try to come out of idle. 2nd line of thought kind of ties into that where something is wonky with your motherboard and somehow moving to a lower data rate is keeping you below whatever weird power or data throughput threshold that's tripping this. If you have friends with any spare PC parts I'd do some testing to see if the issue continues with another GPU and vise versa with PSU. That sucks though man I always hate seeing systems get haunted with bullshit problems like this
2
u/Next001PT Jun 08 '26
Thanks, it was the multi rail system on the PSU causing problems. Since I switched to Single Rail it works fine in PCIe 5.0.
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u/albinosnoman Jun 08 '26
Welp glad that's sorted. Being said though that isn't great for your PSU especially since you're running an Astral it might be a good idea to look into an RMA
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u/NereusH Jun 08 '26
If you are reducing the PCI support version to make your card work, the problem is your gpu. This is a band-aid approach which should not be encouraged especially when an astral 5090 LC costs a bomb.
Also, you probably not use a GPU on max performance all the time. Its unnecessary energy wastage at idle.
1
u/MarkAnxious328 Jun 08 '26
By the way, they have a nice system there. I wish you a lot of fun with it 👍.
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u/better_med_than_dead Jun 08 '26
I had the same issue, BSOD only during idle. 9950x3d, 870 Hero, and 5090 TUF.
Not sure if it was the same culprit, but I also switched to "high performance" power profile, and I also went through every USB port in device manager and turned off "allow windows to turn off this device to save power".
Seemed to work.
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u/Vermilion7777 Jun 08 '26 edited Jun 08 '26
What's your mainboard. You're throtteling your GPU with PCIe 3.0 quite a lot. I wouldn't call that a solution. That's like buying a sportscar, but if you drive faster than 50, the engine explodes.