Even if you don't have a GPU installed, maybe you have a built in one (some laptops have this)
Check what GPU that is recognized by DAZ like this:
1. Go to Menu item: "Help" -> "Troubleshooting" -> "About your Video Card"
2. Look at the popup box.
This is what mine says:
Trying to use Daz without any Nvidia GPU is going to be very frustrating as you can only use CPU render and it will take 20-50x longer. Daz uses a render library from Nvidia called Iray to implement the raytracing, and it does not support AMD or Intel GPU. Iray can work on CPU but as mentioned it is much much slower.
The only fallback is to try "Filament" which is a "biased" render engine. Filament is faster on CPU only than Iray, but gives results which are not as perfect as true raytracing.
However most products do not have build in Filament support so you will need to modify the lighting and materials for each one.
Also, note that even if you DO have a Nvidia GPU, it is common to have some amount of "grain" in images if you have poor lighting or problematic texture materials. These days most users just try a AI image denoiser to fix the grain, but of course this process loses much of the fine detail in the image.
There are also some denoisers for AMD card or even CPU, so look around beyond the one that was linked above if you have that situation.
