Question Rx 6600 xt using pcie 3.0 with pcie 4.0 compatible motherboard

BoomBoomBot

Prominent
Jan 19, 2021
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Just as the title says. Need help figuring out how to change to pcie 4.0. Bios has no setting to change it after looking.
Specs:
Cpu: ryzen 5 5600
Gpu: rx 6600 xt
Motherboard asus prime b450m k
Cpu z says the motherboard suppots pcie 4.0 but the gpu runs at 8 gb/s with a maximum of 16 gb/s
 
Just as the title says. Need help figuring out how to change to pcie 4.0. Bios has no setting to change it after looking.
Specs:
Cpu: ryzen 5 5600
Gpu: rx 6600 xt
Motherboard asus prime b450m k
Cpu z says the motherboard suppots pcie 4.0 but the gpu runs at 8 gb/s with a maximum of 16 gb/s
The GPU and motherboard will automatically be running PCIe 3.0 since your motherboard is limited to PCIe 3.0. The GPU itself is designed to only use PCIe 4.0 with up to x8 PCIe lanes on a PCIe 4.0 compatible motherboard and with a PCIe 4.0 compatible CPU. So with the motherboard you have, you will only ever see it running PCIe x8 3.0. You would need a B550/X570 to get PCIe 4.0 with your Ryzen 5 5600.
 

DSzymborski

Titan
Moderator
Expansion Slots
3rd/2nd/1st Gen AMD Ryzen™ Processors
1 x PCIe 3.0/2.0 x16 (x16 mode)
2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics Processors
1 x PCIe 3.0/2.0 x16 (x8 mode) *1
AMD Athlon™ with Radeon™ Vega Graphics Processors
1 x PCIe 3.0/2.0 x16 (max at x4 mode)
AMD B450 chipset
2 x PCIe 2.0 x1
 
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