Both have 128m and 256m. If your Elsa X700 is 256mb, but the BIOS doesn't recognize it or it won't recognize it, you can boot into the BIOS to find the graphics card and manually turn it up [256 m]. Here are two kinds of graphics cards: Elsa X700 flagship.
Graphics chip manufacturer: ATI graphics chip: Radium X700 memory type: DDRIII memory capacity (MB):256 memory bit width: 128bit bus interface: PCI-E 16X memory speed (NS): 2.8ns
Elsa X700 Ultimate Edition
Graphics Chip Manufacturer: ATI Graphics Chip: Radium Dragon X700 Memory Type: DDRIII Memory Capacity (MB): 128 Memory Bit Width: 128bit Bus Interface: PCI-E 16X Memory Speed (ns):2ns.
Elsa X 1300 HM version
Graphics chip manufacturer: ATI graphics chip: radium X 1300 memory type: DDR memory capacity (MB): 128 memory bit width: 128bit bus interface: PCI-E 16X memory speed (ns): 5.0ns
Elsa X 1300 ultimate edition
Graphics chip manufacturer: ATI graphics chip: radium X 1300 Memory type: DDRII memory capacity (MB):256 memory bit width: 128bit bus interface: PCI-E 16X memory speed (ns):2.8.