this is from crucial web site
A: how much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. More information about OS memory maximums can be found at http://www.crucial.com/kb/answer.aspx?qid=4251.
this upgrade is for my kids computer my computer is pentium 4 3.4 3 gigs memory, HIS ICE 512mb radeon 4850 video card works like a charm .I need the upgrade for a little while for them.
Supported DRAM Types: SDR SDRAM only
SDR SDRAM Frequencies: PC100 and PC133
168-pin DIMM Banking: 3 (3 banks of 1)
Module Types Supported: Unbuffered only
Max Unbuffered SDR SDRAM: 3072MB
Error Detection Support: Non-ECC only
Graphics Support: AGP 4X
Max Component Density: 512Mb
USB Support: 1.x Compliant
Chipset: SiS 645 (XP4)