diff --git a/ggml/src/ggml-cuda/read.cuh b/ggml/src/ggml-cuda/read.cuh
index 0cd27d90..273e9911 100644
--- a/ggml/src/ggml-cuda/read.cuh
+++ b/ggml/src/ggml-cuda/read.cuh
@@ -1,5 +1,5 @@
 #include "common.cuh"
 
-#define CUDA_READ_BLOCK_SIZE 32
+#define CUDA_READ_BLOCK_SIZE 512
 
 void ggml_cuda_read(ggml_tensor * dst);