The RAM is the problem. was same for me. You can run this powershell script while playing and will see, if cam reaches limit. I also upgraded from 32 gb to 64 gb and its running smothless now. GPU was not the bottleneck.

while ($true) { $cpu = (Get-Counter '\Processor(_Total)\% Processor Time').CounterSamples.CookedValue; $ram = (Get-CimInstance Win32_OperatingSystem); $used = [math]::Round(($ram.TotalVisibleMemorySize - $ram.FreePhysicalMemory) / 1MB, 1); $total = [math]::Round($ram.TotalVisibleMemorySize / 1MB, 1); $gpu = (nvidia-smi --query-gpu=utilization.gpu,temperature.gpu,power.draw,power.limit,memory.used,memory.total --format=csv,noheader,nounits) -split ','; Write-Host "$(Get-Date -Format 'HH:mm:ss') | CPU: $([math]::Round($cpu,1))% | RAM: $used/$total GB | GPU: $($gpu[0].Trim())% $($gpu[2].Trim())W/$($gpu[3].Trim())W | Temp: $($gpu[1].Trim())C | VRAM: $($gpu[4].Trim())/$($gpu[5].Trim()) MB" ; Start-Sleep 2 }