012764-003 is an HP 512MB Battery-Backed Write Cache (BBWC) module for the Smart Array P400 RAID controller. It is a 72-bit DDR cache memory board used to improve RAID write performance and protect cached data when paired with the required BBWC battery and cable. HP service documentation identifies 012764-003 as the 512MB Smart Array cache module, with 405835-001 as the corresponding spare part.
- Part Number: 012764-003
- Manufacturer: HP / HPE
- Product: Smart Array P-Series 512MB Cache Module
- Cache Capacity: 512MB
- Cache Type: Battery-Backed Write Cache (BBWC)
- Memory Type: 72-bit DDR DRAM
- Controller Compatibility: HP Smart Array P400 / P400i family
- Application: RAID write caching, performance optimization and cached-data protection
- Related Spare: 405835-001
- Related Option: 405148-B21 — 512MB BBWC cache upgrade
- Related Assembly: 013126-000
- Battery: 381573-001 / 398648-001 BBWC battery pack
- Battery Cable: 408658-002 / 409125-001, depending on system configuration
- Compatible Systems: HP ProLiant DL120 G5, DL160 G5, DL165 G5, DL180 G5, DL320 G4/G5, DL360 G5, DL365 G1/G5, DL380 G5, DL385 G2/G5, DL580 G4/G5, DL585 G2/G5, DL785 G5/G6/G7, ML350 G5, ML370 G5, ML570 G4 and other supported P400 platforms.
- Included: 1 × 512MB cache module only
- Cache-Only Note: The module does not include the P400 controller or BBWC battery; the battery and cable are separate components.
- Compatibility Note: 012764-003 is the 512MB version; 012764-004 is the corresponding 256MB P400 cache module.
