Improve performance on some lowend GPUs.

comfy/model_management.py

@@ -528,7 +528,7 @@ def unet_inital_load_device(parameters, dtype):
         return cpu_dev
 
 def maximum_vram_for_weights(device=None):
-    return (get_total_memory(device) * 0.8 - minimum_inference_memory())
+    return (get_total_memory(device) * 0.88 - minimum_inference_memory())
 
 def unet_dtype(device=None, model_params=0, supported_dtypes=[torch.float16, torch.bfloat16, torch.float32]):
     if args.bf16_unet: