why this is for server only?

The memory RAM is compatible with Dell Precision Workstation 470 and is registered (Buffered), which is typically used in servers to ensure stability and error correction. It is not designed for regular desktop computers.

Questions & Answers: CMS 16GB (4X4GB) Memory Ram Compatible with Dell Precision Workstation 470 Dual Rank For Server Only - B48

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CMS 16GB (4X4GB) Memory Ram Compatible with Dell Precision Workstation 470 Dual Rank For Server Only - B48

Computer Memory Solutions guarantees compatibility with models provided in description.
Memory Type: Non-ECC DIMM, 240-Pin
Speed: DDR2-3200, 400 MHz
4 Piece Kit
Product appearance may vary. Picture for reference only. limited lifetime warranty when bought directly from computer memory solutions

$37^.75 –