fp16 error on GeForce RTX 2080 Ti

Hi, I'm trying to run BlocksparseMatMul with feature_axis=1 on GeForce RTX 2080 Ti that supports fp16, but I get:

`Gated blocksparse matmul currently only supported on fp16 tensorcores.
	 [[node BlocksparseMatMul_000000 (defined at <string>:2247)`

I installed the package using pip. 
I use CUDA 10 and tensorflow 1.13.

Could you help?