X86-Secret : ES Zone
Celeron 633 MHz ES  (Week 27, Year 2000)   
Celeron / RB80526RX633128 / Q027A549-0017 QZ46ES

An early engineering sample of the Celeron 633, one of the first Celeron with the new coppermine core after Intel switched from the Mendocino Core. Based on a 0.18 ┬Ám coppermine core, this CPU includes 128 KB of L2 cache and the SSE instructions. It was built in mid-2000 while intel announced the Celeron 633 on Jun, 26th 2000