vkAllocateMemory failed on AMD RX6600 GPU

[ThisisBillhe]

Here are the full logs:

C:\Users\h3092\Desktop\zimage-ncnn-vulkan-20260212-windows\zimage-ncnn-vulkan-20260212-windows>zimage-ncnn-vulkan.exe -p "A half-length portrait in the warm light of a convenience store late at night. An East Asian beauty, holding milk, meets your gaze in front of the freezer." -r 2065820720
[0 AMD Radeon RX 6600]  queueC=1[4]  queueT=2[2]  rebar=0  r-score=73
[0 AMD Radeon RX 6600]  fp16-p/s/u/a=1/1/1/1  int8-p/s/u/a=1/1/1/1  bf16-p/s=1/0
[0 AMD Radeon RX 6600]  subgroup=64(32~64)  ops=1/1/1/1/1/1/1/1/1/1
[0 AMD Radeon RX 6600]  fp16-cm=0  int8-cm=0  bf16-cm=0  fp8-cm=0
prompt = A half-length portrait in the warm light of a convenience store late at night. An East Asian beauty, holding milk, meets your gaze in front of the freezer.
negative-prompt =
output-path = out.png
model = z-image-turbo
image-size = 1024 x 1024
steps = 9
seed = 2065820720
gpu-id = 0
low_vram = 1
vae_tile_size = 1024 x 1024
num_patches = 64 x 64
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -1000072003
vkAllocateMemory failed -2

C:\Users\h3092\Desktop\zimage-ncnn-vulkan-20260212-windows\zimage-ncnn-vulkan-20260212-windows>

[ThisisBillhe]

I see that the usage of shared GPU memory increases instead of the dedicated GPU memory. I think it might be related to the bug?

[nihui]

zimage-ncnn requires at least 13GB of space to store weight data. On Windows, this can be either shared or dedicated video memory. RX6600 is an 8GB graphics card, and zimage-ncnn will attempt to use shared video memory. However, since your computer has less than 26GB of RAM, shared video memory on Windows is typically half of the total system memory, insufficient to handle the full load, hence the error.

This is a known issue on Windows; this limitation does not exist on Linux. I will try a hybrid allocation strategy using shared and dedicated video memory, and I will let you know if there is any good news.

[ThisisBillhe]

zimage-ncnn requires at least 13GB of space to store weight data. On Windows, this can be either shared or dedicated video memory. RX6600 is an 8GB graphics card, and zimage-ncnn will attempt to use shared video memory. However, since your computer has less than 26GB of RAM, shared video memory on Windows is typically half of the total system memory, insufficient to handle the full load, hence the error.

This is a known issue on Windows; this limitation does not exist on Linux. I will try a hybrid allocation strategy using shared and dedicated video memory, and I will let you know if there is any good news.

Looking forward to it!

[nihui]

Tencent/ncnn#6545

[nihui]

try https://github.com/nihui/zimage-ncnn-vulkan/releases/tag/20260213

[nihui]

I have clarified the information regarding the minimum system requirements for Windows, and updated it in the readme.

https://github.com/nihui/zimage-ncnn-vulkan?tab=readme-ov-file#requirements

[ThisisBillhe]

Thanks for your effort, nihui dalao!!