well if going with EK, its not difficult to look up the compatibility chart. Its clear enough which cards work with which block. You just look for SKU number on the gpu.
Bitspower do it also.
take the first block I found for example. Top of the list
ASUS Dual GeForce RTX 2070 Advanced, DUAL-RTX2070-A8G, 8GB GDDR6, (
90YV0C85-M0NA00)
ASUS Dual GeForce RTX 2070 OC, DUAL-RTX2070-O8G, 8GB GDDR6, (
90YV0C82-M0NA00)
ASUS Dual GeForce RTX 2080 Advanced, DUAL-RTX2080-A8G, 8GB GDDR6, (
90YV0C32-M0NM00)
ASUS Dual GeForce RTX 2080 OC, DUAL-RTX2080-O8G, 8GB GDDR6 (
90YV0C30-M0NA00)
ASUS Dual GeForce RTX 2080 SUPER Evo, DUAL-RTX2080S-8G-EVO, 8GB GDDR6, (
90YV0DJ2-M0NM00)
ASUS Dual GeForce RTX 2080 SUPER OC Evo, DUAL-RTX2080S-O8G-EVO, 8GB GDDR6, (
90YV0DJ0-M0NM00)
ASUS Dual GeForce RTX 2080, DUAL-RTX2080-8G, 8GB GDDR6, (
90YV0C33-M0NM00)
And these SKU numbers should be visible when you order the GPU.