There isn't any difference in specifications between the "GX" and "GA" model numbers. DDR5 R-DIMM memory package fashions with "GE" are designed for Memory Wave App 8-channel platforms, and will not be appropriate with 4-channel platforms. DDR5 R-DIMM memory equipment fashions with "GQ" are designed for 4-channel platforms, and will not be suitable with 8-channel platforms. DDR5 U-DIMM memory kit fashions shouldn't include "GE" or "GQ" within the model numbers. The first two digits correspond to tCL