Hey @han_taku
I’ve seen several issues in Unreal with less than 16GB RAM and 8VRAM, maybe that’s your problem?
Here an example from Unreal (too much for me, but seems that’s the optimum)
Reference: Hardware and Software Specifications for Unreal Engine | Unreal Engine 5.2 Documentation
Performance Notes
The spec below represents a typical system used at Epic (a Lenovo P620 Content Creation Workstation, standard version). This provides a reasonable guideline for developing games with Unreal Engine 5:
• Operating System: (2h22) • Power Supply: 1000W power supply unit • RAM: 128GB DDR4-3200 • Processor: AMD Ryzen Threadripper Pro 3975WX Processor - 128MB Cache, 3.5 GHz base / 4.2 GHz turbo, 32 Cores / 64 Threads, 280w TDP • OS Drive 1 TB M.2 NVMe3 x4 PCI-e SSD • DATA Drive 4 TB Raid Array - 2 x 2TB NVMe3 x4 PCI-e SSD in Raid 0 • GPU: Nvidia RTX 3080 - 10GB • NIC 1GBPS on-board + Intel X550-T1 10G PCI-e Ethernet adapter • TPM Compliant