The C5J low-power x86 processor core incorporates NX execution protection. IBM will manufacture the C5J "Esther" processor, developed by Via Technologies, using 90-nm technology. With the NX support, operating systems like Windows XP with Service Pack 2 can provide additional protection against worms and viruses. The chip also employs Via's Padlock encryption and authentication hardware. The C5J starts with 1-GHz parts using an 800-MHz front-side bus. Chips will contain enhanced SSE2/SSE3 multimedia instructions and a larger L2 cache. Its low-power design targets mobile applications.