Looks like it supports 512
Component Attributes
RAM (standard)
64 megabytes (MB) RAM PC100
Maximum
512 MB (2 x 256 MB DIMM)
Speed
100 MHz synchronous
Sockets
Two 168-pin DIMMs
Size
16, 32, 64, 128, and 256 MB DIMMs
Free DIMM sockets
1
Pairs Required
No
Type Supported
SDRAM, 100 MHz,
Intel PC SDRAM unbuffered DIMM specification,
revision 1.0 compliant
Component Attributes
RAM (standard)
64 megabytes (MB) RAM PC100
Maximum
512 MB (2 x 256 MB DIMM)
Speed
100 MHz synchronous
Sockets
Two 168-pin DIMMs
Size
16, 32, 64, 128, and 256 MB DIMMs
Free DIMM sockets
1
Pairs Required
No
Type Supported
SDRAM, 100 MHz,
Intel PC SDRAM unbuffered DIMM specification,
revision 1.0 compliant