Is it okay to put Gen 3 SSD in my motherboards Gen 4 pcie slots?

I want to upgrade the SSD of my laptop Need some help with will a gen 4 ssd work in a gen 3 slot PCIe Gen 3 vs PCIe Gen 4 PCIe offers twice the data rate and maximum bandwidth of PCIe , allowing faster data transfers The standard willy wonka slot machine vegas 653206-B21 HP DL380p560 Gen8 3 Slot PCI-E Riser Kit => but it only works when you have 2 processors inside ! Than all your 2x HHHL cards will

willis creek slot canyon Supports AMD Ryzen™ 5000 series Ryzen™ 5000 G-Series 3rd Gen Ryzen 4+3 phase Hybrid Digital PWM 9 Dual Channel DDR4, 4DIMMs 10 Supports AMD