The Sun 370-6203 memory kit is designed for use in Sun servers and contains two 1GB DDR1 SDRAM modules, totaling 2GB of memory capacity. Each module is 1024MB and has a bus speed of PC2100R-20331. The memory features ECC memory and registered capabilities. This kit is perfect for upgrading your server's memory and improving its performance. It is compatible with Sun servers and can be used in various applications. Whether you need to boost your server's performance or increase its capacity, this memory kit is an excellent choice.