PCI express bus speed only running at x8 v3.0 instead of x16 v3.0

[GabrielOvejero]

My cpu is Ryzen 5 3400g, Mother a320m-s2h

 

[3x0]

Make sure there is no dust in the PCIe slot. Does it show x8 when running a 3D load?

 

[GerKNG]

normal at idle.

 

[GabrielOvejero]

normal at idle.

at idle it drops to x8 1.1.

 

[dj-electric]

My cpu is Ryzen 5 3400g

This is why. APUs budget X8 for their PCIe external interface

 

[GabrielOvejero]

Make sure there is no dust in the PCIe slot. Does it show x8 when running a 3D load?

at maximum use it remains at x8 3.0, when I wake up I'll try to reinstall it

 

[GerKNG]

This is why. APUs budget X8 for their PCIe external interface

"The 3400G includes 20 PCIe lanes - 16 for a discrete graphics processor and 4 for storage (NVMe or 2 ports SATA Express)."

 

[GabrielOvejero]

This is why. APUs budget X8 for their PCIe external interface

even if I have the integrated disabled?

 

[agent00skid]

Ryzen 2000 and 3000 series APU's only have 8 lanes for GPU.

 

[dj-electric]

"The 3400G includes 20 PCIe lanes - 16 for a discrete graphics processor and 4 for storage (NVMe or 2 ports SATA Express)."

idk what this quotes, but it is definitely not AMD's own source. Any APUs for AM4 have 8 lanes internally fused to the iGPU, and that takes the real estate of the main PCIe X16 dGPU connectivity.
You can even browse motherboard spec lists to see this mentioned

To the question if you can disable the iGPU, no. The 8 lanes are physically fused to the iGPU. They are lost to that even when the iGPU is disabled

 

[GabrielOvejero]

idk what this quotes, but it is definitely not AMD's own source. Any APUs for AM4 have 8 lanes internally fused to the iGPU, and that takes the real estate of the main PCIe X16 dGPU connectivity.
You can even browse motherboard spec lists to see this mentioned

To the question if you can disable the iGPU, no. The 8 lanes are physically fused to the iGPU. They are lost to that even when the iGPU is disabled

would a processor without integrated graphics solve the problem? Sorry for my english, I thought that disabling the IGPU from the bios would fix it, but apparently not.

 

[dj-electric]

Having only 8 lanes for a GPU is not a serious problem. I don't see much point in solving it. The only problem might be CPU bottlenecks in some scenarios, but besides that, all GPUs can live off 8 lanes quite normally

 

[Kapone33]

would a processor without integrated graphics solve the problem? Sorry for my english, I thought that disabling the IGPU from the bios would fix it, but apparently not.

yes

 

[GerKNG]

idk what this quotes, but it is definitely not AMD's own source.

it's from wikichip.

 

[dj-electric]

it's from wikichip.

Than it might cause misinformation. It is correct that at the very core these APUs contain 16 lanes for graphics, but what they don't mention is the fact that half of it is fused for the Radeon iGPU unit.
This has been AMD's method for PCIe lane budgeting throughout the entire AM4 platform, regardless if 2200G, 3400G, 4650G or 5600G.

 

[agent00skid]

Than it might cause misinformation. It is correct that at the very core these APUs contain 16 lanes for graphics, but what they don't mention is the fact that half of it is fused for the Radeon iGPU unit.
This has been AMD's method for PCIe lane budgeting throughout the entire AM4 platform, regardless if 2200G, 3400G, 4650G or 5600G.

That is NOT correct. 4000G and 5000G series chips have 16 lanes of PCIe for GPU. AMD just skimped on lanes for 2000G and 3000G chips.

 

[dj-electric]

That is NOT correct. 4000G and 5000G series chips have 16 lanes of PCIe for GPU. AMD just skimped on lanes for 2000G and 3000G chips.

oh yeah, my bad. forgot that part. I stand corrected. I even own a 5600G somewhere and forgot.
The only sin there is due to architechture it uses PCIe Gen3

 

[eidairaman1]

would a processor without integrated graphics solve the problem? Sorry for my english, I thought that disabling the IGPU from the bios would fix it, but apparently not.

Yes

That is NOT correct. 4000G and 5000G series chips have 16 lanes of PCIe for GPU. AMD just skimped on lanes for 2000G and 3000G chips.

Go with the 5000g line if there is a bios update for the motherboard