XGen of Maya can not use full VRAM of AMD GPU

[cailiao1987LLKWA]

Hi, guys.

    My GPU is AMD RX5700XT(8GB VRAM),recently i want to see hou many VRAMs my Xgen file used.

    So i open the "Display-Heads up Display-XGen info", then maya display 4096MB in the top left corner.

   

    It's strange that I saw Maya recognize my graphics card and memory information correctly in xgen cache.

    At first, I thought it was just a display error. But it is true that maya became very low FPS after opened a XGen file over 4096MB VRAM,

    So far, I'm lucky to think that all GPUs should encounter this problem....but... 

    I asked a colleague who used the NVIDIA GTX1080TI card，gave me his photo that display the correct 11GB VRAM...

    I searched  another user who use NVIDIA Titan V (12GB VRAM), the result is 12GB full was displayed...

    3 images uploaded

    I had tried a lot settings in preferences... but nothing changed... still 4096MB...

    The same thing happened to my other rx580(8GB VRAM)...  all drivers were the latest version.

    Really don't know what to do next, so I have to come here for help.... 

    Maybe.... Maya treats NVIDIA and AMD's graphics card differently？？？

[Christoph_Schaedl]

Most of those GPU features are based on CUDA and Optix. And both are Nvidia only.

[cailiao1987LLKWA]

i think this is hard to accept..... XGen just a plugin for hair/fur,

maya just run with DX11 and openGL...

if maya/XGen are based on CUDA and Optix, AMD GPU should fail to run them directly (just like raytrace realtime) 

not that just use half VRAM.....