[SOLVED] PCIEX16_1 port is stuck at x2 instead of x16 on ASUS Rog Strix Z490-E ?

[ObsNGaming]

Hi Everyone,

For whatever reason, my PCIEX16_1 port is stuck at x2 instead of x16.

https://imgur.com/a/y1h9Dd5

View: https://imgur.com/a/y1h9Dd5


Hardware :

• ASUS ROG Strix Z490-E (LGA 1200, Intel Z490, ATX)
• Intel Core i9-10900K (LGA 1200, 3.70GHz, 10-Core)
• Thermaltake Water 3.0 360 ARGB Sync (5.20cm)
• 4x Corsair Vengeance RGB Pro (16Go, DDR4-3600, DIMM 288)
• Samsung 970 EVO Plus (1000Go, M.2 2280) on M.2_1 Socket
• Gigabyte GeForce RTX 3080 GAMING OC (10Go)
• Samsung 860 QVO (2000Go, 2.5") on SATA6G_1
• Samsung 850 EVO Basic (500Go, 2.5") on SATA6G_2

I've tried pretty much everything I found on the internet and can't find a solution :

• Update BIOS
• Reset BIOS default settings (but no proper BIOS hard reset)
• Unplugged - re plugged the RTX3080
• Checked the PCIEX16_1 slot, seems to be cleaned and not damaged but it's hard to see.
• Plugged the RTX3080 in the PCIEX16_2 slot and it properly runs at x8
• Removed all SSD's including the M2
• Tried with my old GTX1080 on PCIEX16_1, also stays at x2
• Plugged the RTX3080 in my old PC, properly runs at x16.
• Unplugged and replugged the CPU on it's slot.

My SATA Mode Selection is currently set on RAID instead of AHCI, but I have to reinstall my OS to do this change, however I've tried to change to AHCI and it didn't changed anything and I don't see why it would.

I don't know what else to do, can the MB be damaged ?

I thank you in advance for your help.

 

[kanewolf]

Have you tried it with GPU-Z test? Most graphics cards shutdown many PCIe lanes to save power when they are not heavily used. With GPU-Z you can run the stress test and see the PCIe lane usage.

 

[SkyNetRising]

• Unplugged and replugged the CPU on it's slot.

Check cpu socket for bent pins.