is this normal ?

If i start PhoenixMiner 5.5c on a RX 6900xt it only detects 40 CU.
I though the 6900xt has 80 CU ? Or did the miner count them different and its normal ?

<<<<main GPU1: AMD Radeon RX 6900 XT (pcie 10), OpenCL 2.0, 16 GB VRAM, 40 CUs ??>>>>